/*-------------------------------------------------------------------- * $Id: gmt_plot.c 12937 2014-02-22 05:11:02Z pwessel $ * * Copyright (c) 1991-2014 by P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis and F. Wobbe * See LICENSE.TXT file for copying and redistribution conditions. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; version 3 or any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * Contact info: gmt.soest.hawaii.edu *--------------------------------------------------------------------*/ /* * * G M T _ P L O T . C * *- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * GMT_plot.c contains code related to plotting maps. These functions requires * we pass both the GMT and PSL control strucure pointers. * * Author: Paul Wessel * Date: 1-JAN-2010 * Version: 5 * * * PUBLIC Functions include: * * GMT_draw_map_scale : Plot map scale * GMT_draw_front : Draw a front line * gmt_echo_command : Puts the command line into the PostScript file as comments * GMT_geo_line : Plots line in lon/lat on maps, takes care of periodicity jumps * GMT_geo_ellipse : Plots ellipse in lon/lat on maps, takes care of periodicity jumps * GMT_geo_polygons : Plots polygon in lon/lat on maps, takes care of periodicity jumps * GMT_geo_rectangle : Plots rectangle in lat/lon on maps, takes care of periodicity jumps * GMT_map_basemap : Generic basemap function * GMT_map_clip_off : Deactivate map region clip path * GMT_map_clip_on : Activate map region clip path * GMT_plane_perspective : Adds PS matrix to simulate perspective plotting * GMT_plot_line : Plots path (in projected coordinates), takes care of boundary crossings * gmt_timestamp : Plot UNIX time stamp with optional string * GMT_vector : Draw 2/3-D vector * GMT_vertical_axis : Draw 3-D vertical axes * GMT_xy_axis : Draw x or y axis * * INTERNAL Functions include: * * gmt_conic_map_boundary : Plot basemap for conic projections * gmt_linear_map_boundary : Plot basemap for Linear projections * GMT_linearx_grid : Draw linear x grid lines * gmt_lineary_grid : Draw linear y grid lines * gmt_logx_grid : Draw log10 x grid lines * gmt_logy_grid : Draw log10 y grid lines * gmt_powx_grid : Draw power x grid lines * gmt_powy_grid : Draw power y grid lines * gmt_map_annotate : Annotate basemaps * gmt_map_boundary : Draw the maps boundary * gmt_map_gridcross : Draw grid crosses on maps * gmt_map_gridlines : Draw gridlines on maps * gmt_map_latline : Draw a latitude line * gmt_map_lattick : Draw a latitude tick mark * gmt_map_lonline : Draw a longitude line * gmt_map_lontick : Draw a longitude tick mark * gmt_map_symbol : Plot map annotation * gmt_map_symbol_ew : for east/west sides * gmt_map_symbol_ns : for south/north sides * gmt_map_tick : Draw the ticks * gmt_map_tickmarks : Plot tickmarks on maps * gmt_fancy_map_boundary : Plot basemap for Mercator projection * gmt_ellipse_map_boundary : Plot basemap for Mollweide and Hammer-Aitoff projections * gmt_oblmrc_map_boundary : Plot basemap for Oblique Mercator projection * gmt_polar_map_boundary : Plot basemap for Polar stereographic projection * gmt_rect_map_boundary : Plot plain basemap for projections with rectangular boundaries * gmt_basic_map_boundary : Plot plain basemap for most projections * gmt_wesn_map_boundary : Plot plain basemap for projections with geographical boundaries * gmt_theta_r_map_boundary : Plot plain basemap for polar (cylindrical) projection */ #include "gmt_dev.h" #include "gmt_internals.h" double GMT_great_circle_dist_degree (struct GMT_CTRL *GMT, double lon1, double lat1, double lon2, double lat2); int gmt_load_custom_annot (struct GMT_CTRL *GMT, struct GMT_PLOT_AXIS *A, char item, double **xx, char ***labels); #define GMT_ELLIPSE_APPROX 72 /* Local variables to this file */ size_t GMT_n_annotations[4] = {0, 0, 0, 0}; size_t GMT_alloc_annotations[4] = {0, 0, 0, 0}; double *GMT_x_annotation[4] = {NULL, NULL, NULL, NULL}, *GMT_y_annotation[4] = {NULL, NULL, NULL, NULL}; /* Get bitmapped 600 dpi GMT glyph for timestamp. 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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, }; struct GMT_CIRCLE { /* Helper variables needed to draw great or small circle heads */ double lon[2], lat[2]; /* Coordinates of arc end points */ double A[3], B[3]; /* Cartesian vector of arc end points */ double P[3]; /* Cartesian vector of the pole */ bool longway; /* True if the arc > 180 degres */ double r0; /* Arc length in degrees */ double r; /* Will be 180 less if longway is true, otherwise r == r0 */ double colat; /* Colatitude of circle relative to pole */ double rot; /* Full opening angle of vector arc */ }; /* GMT_LINEAR PROJECTION MAP BOUNDARY */ void gmt_linear_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { unsigned int form, cap = PSL->internal.line_cap; double x_length, y_length; x_length = GMT->current.proj.rect[XHI] - GMT->current.proj.rect[XLO]; y_length = GMT->current.proj.rect[YHI] - GMT->current.proj.rect[YLO]; if (GMT->current.map.frame.draw) { /* Temporarily change to square cap so rectangular frames have neat corners */ PSL_setlinecap (PSL, PSL_SQUARE_CAP); if (GMT->current.map.frame.side[W_SIDE]) GMT_xy_axis (GMT, GMT->current.proj.rect[XLO], GMT->current.proj.rect[YLO], y_length, s, n, &GMT->current.map.frame.axis[GMT_Y], true, GMT->current.map.frame.side[W_SIDE] & 2); /* West or left y-axis */ if (GMT->current.map.frame.side[E_SIDE]) GMT_xy_axis (GMT, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YLO], y_length, s, n, &GMT->current.map.frame.axis[GMT_Y], false, GMT->current.map.frame.side[E_SIDE] & 2); /* East or right y-axis */ if (GMT->current.map.frame.side[S_SIDE]) GMT_xy_axis (GMT, GMT->current.proj.rect[XLO], GMT->current.proj.rect[YLO], x_length, w, e, &GMT->current.map.frame.axis[GMT_X], true, GMT->current.map.frame.side[S_SIDE] & 2); /* South or lower x-axis */ if (GMT->current.map.frame.side[N_SIDE]) GMT_xy_axis (GMT, GMT->current.proj.rect[XLO], GMT->current.proj.rect[YHI], x_length, w, e, &GMT->current.map.frame.axis[GMT_X], false, GMT->current.map.frame.side[N_SIDE] & 2); /* North or upper x-axis */ PSL_setlinecap (PSL, cap); /* Reset back to default */ } if (!GMT->current.map.frame.header[0] || GMT->current.map.frame.plotted_header || GMT->current.setting.map_frame_type & GMT_IS_INSIDE) return; /* No header today */ PSL_comment (PSL, "Placing plot title\n"); if (!GMT->current.map.frame.draw || GMT->current.map.frame.side[N_SIDE] == 0) PSL_defunits (PSL, "PSL_H_y", GMT->current.setting.map_title_offset); /* No ticks or annotations, offset by map_title_offset only */ else PSL_command (PSL, "/PSL_H_y PSL_L_y PSL_LH add %d add def\n", psl_iz (PSL, GMT->current.setting.map_title_offset)); /* For title adjustment */ PSL_command (PSL, "%d %d PSL_H_y add M\n", psl_iz (PSL, 0.5 * x_length), psl_iz (PSL, y_length)); form = GMT_setfont (GMT, &GMT->current.setting.font_title); PSL_plottext (PSL, 0.0, 0.0, -GMT->current.setting.font_title.size, GMT->current.map.frame.header, 0.0, PSL_BC, form); GMT->current.map.frame.plotted_header = true; } unsigned int gmt_get_primary_annot (struct GMT_PLOT_AXIS *A) { /* Return the primary annotation item number [== GMT_ANNOT_UPPER if there are no unit set]*/ unsigned int i, no[2] = {GMT_ANNOT_UPPER, GMT_ANNOT_LOWER}; double val[2], s; for (i = 0; i < 2; i++) { val[i] = 0.0; if (!A->item[no[i]].active || A->item[no[i]].type == 'i' || A->item[no[i]].type == 'I') continue; switch (A->item[no[i]].unit) { case 'Y': case 'y': s = GMT_DAY2SEC_F * 365.25; break; case 'O': case 'o': s = GMT_DAY2SEC_F * 30.5; break; case 'U': case 'u': s = GMT_DAY2SEC_F * 7.0; break; case 'K': case 'k': case 'D': case 'd': s = GMT_DAY2SEC_F; break; case 'H': case 'h': s = GMT_HR2SEC_F; break; case 'M': case 'm': s = GMT_MIN2SEC_F; break; case 'C': case 'c': s = 1.0; break; default: /* No unit specified - probably not a time axis */ s = 1.0; break; } val[i] = A->item[no[i]].interval * s; } return ((val[0] > val[1]) ? GMT_ANNOT_UPPER : GMT_ANNOT_LOWER); } bool gmt_skip_second_annot (unsigned int item, double x, double x2[], unsigned int n, unsigned int primary) { unsigned int i; bool found; double small; if (n < 2) return (false); /* Need at least two points so no need to skip */ if (item == primary) return (false); /* Not working on secondary annotation */ if (!x2) return (false); /* None given */ small = (x2[1] - x2[0]) * GMT_SMALL; for (i = 0, found = false; !found && i < n; i++) found = (fabs (x2[i] - x) < small); return (found); } void GMT_xy_axis (struct GMT_CTRL *GMT, double x0, double y0, double length, double val0, double val1, struct GMT_PLOT_AXIS *A, bool below, bool annotate) { unsigned int k, i, nx, nx1, np = 0;/* Misc. variables */ unsigned int annot_pos; /* Either 0 for upper annotation or 1 for lower annotation */ unsigned int primary; /* Axis item number of annotation with largest interval/unit */ unsigned int axis = A->id; /* Axis id (GMT_X, GMT_Y, GMT_Z) */ bool horizontal; /* true if axis is horizontal */ bool neg = below; /* true if annotations are to the left of or below the axis */ bool faro; /* true if the anchor point of annotations is on the far side of the axis */ bool is_interval; /* true when the annotation is interval annotation and not tick annotation */ bool do_annot; /* true unless we are dealing with Gregorian weeks */ bool do_tick; /* true unless we are dealing with bits of weeks */ bool form; /* true for outline font */ bool ortho = false; /* true if annotations are orthogonal to axes */ double *knots = NULL, *knots_p = NULL; /* Array pointers with tick/annotation knots, the latter for primary annotations */ double x, t_use; /* Misc. variables */ struct GMT_FONT font; /* Annotation font (FONT_ANNOT_PRIMARY or FONT_ANNOT_SECONDARY) */ struct GMT_PLOT_AXIS_ITEM *T = NULL; /* Pointer to the current axis item */ char string[GMT_LEN256] = {""}; /* Annotation string */ char format[GMT_LEN256] = {""}; /* format used for non-time annotations */ char *axis_chr[3] = {"ns", "ew", "zz"}; /* Characters corresponding to axes */ char **label_c = NULL; double (*xyz_fwd) (struct GMT_CTRL *, double) = NULL; struct PSL_CTRL *PSL= GMT->PSL; /* Initialize parameters for this axis */ horizontal = (axis == GMT_X); /* This is a horizontal axis */ xyz_fwd = ((axis == GMT_X) ? &GMT_x_to_xx : (axis == GMT_Y) ? &GMT_y_to_yy : &GMT_z_to_zz); primary = gmt_get_primary_annot (A); /* Find primary axis items */ np = GMT_coordinate_array (GMT, val0, val1, &A->item[primary], &knots_p, NULL); /* Get all the primary tick annotation knots */ if (strchr (GMT->current.setting.map_annot_ortho, axis_chr[axis][below])) ortho = true; /* Annotations are orthogonal */ if (GMT->current.setting.map_frame_type & GMT_IS_INSIDE) neg = !neg; /* Annotations go either below or above the axis */ faro = (neg == (horizontal && !ortho)); /* Current point is at the far side of the tickmark? */ if (A->type != GMT_TIME) GMT_get_format (GMT, GMT_get_map_interval (GMT, &A->item[GMT_ANNOT_UPPER]), A->unit, A->prefix, format); /* Set the annotation format template */ /* Ready to draw axis */ if (axis == GMT_X) PSL_comment (PSL, below ? "Start of lower x-axis\n" : "Start of upper x-axis\n"); else if (axis == GMT_Y) PSL_comment (PSL, below ? "Start of left y-axis\n" : "Start of right y-axis\n"); else PSL_comment (PSL, below ? "Start of front z-axis\n" : "Start of back z-axis\n"); PSL_setorigin (PSL, x0, y0, 0.0, PSL_FWD); /* Change up/down (neg) and/or flip coordinates (exch) */ PSL_command (PSL, "/MM {%s%sM} def\n", neg ? "neg " : "", (axis != GMT_X) ? "exch " : ""); for (k = 0; k < 2; k++) { PSL_command (PSL, "/PSL_A%d_y %d def\n", k, A->item[k].active || A->item[k+2].active ? psl_iz (PSL, GMT->current.setting.map_tick_length[k]) : 0); /* Length of primary/secondary tickmark */ } PSL_comment (PSL, "Axis tick marks and annotations\n"); GMT_setpen (GMT, &GMT->current.setting.map_frame_pen); if (horizontal) PSL_plotsegment (PSL, 0.0, 0.0, length, 0.0); else PSL_plotsegment (PSL, 0.0, length, 0.0, 0.0); if (GMT->current.setting.map_frame_type & GMT_IS_GRAPH) { /* Extend axis 7.5% with an arrow */ struct GMT_FILL arrow; double vector_width, dim[PSL_MAX_DIMS]; GMT_init_fill (GMT, &arrow, GMT->current.setting.map_frame_pen.rgb[0], GMT->current.setting.map_frame_pen.rgb[1], GMT->current.setting.map_frame_pen.rgb[2]); GMT_setfill (GMT, &arrow, false); GMT_memset (dim, PSL_MAX_DIMS, double); vector_width = rint (PSL_DOTS_PER_INCH * GMT->current.setting.map_frame_pen.width / PSL_POINTS_PER_INCH) / PSL_DOTS_PER_INCH; /* Round off vector width same way as pen width */ dim[2] = vector_width; dim[3] = 10.0 * vector_width; dim[4] = 5.0 * vector_width; dim[5] = GMT->current.setting.map_vector_shape; dim[6] = GMT_VEC_END | GMT_VEC_FILL; if (horizontal) { dim[0] = 1.075 * length; dim[1] = 0.0; PSL_plotsymbol (PSL, length, 0.0, dim, PSL_VECTOR); } else { dim[0] = 0.0; dim[1] = 1.075 * length; PSL_plotsymbol (PSL, 0.0, length, dim, PSL_VECTOR); } } GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); for (k = 0; k < GMT_GRID_UPPER; k++) { /* For each one of the 6 axis items (gridlines are done separately) */ T = &A->item[k]; /* Get pointer to this item */ if (!T->active) continue; /* Do not want this item plotted - go to next item */ is_interval = (T->type == 'i' || T->type == 'I'); /* Interval or tick mark annotation? */ nx = GMT_coordinate_array (GMT, val0, val1, &A->item[k], &knots, &label_c); /* Get all the annotation tick knots */ do_annot = (nx && k < GMT_TICK_UPPER && annotate && !GMT_axis_is_geo (GMT, axis) && T->unit != 'r'); /* Cannot annotate a Gregorian week */ do_tick = !((T->unit == 'K' || T->unit == 'k') && T->interval > 1 && fmod (T->interval, 7.0) > 0.0); /* Do we want tick marks? */ nx1 = (nx > 0 && is_interval) ? nx - 1 : nx; /* First plot all the tick marks */ if (do_tick) { for (i = 0; i < nx; i++) { if (knots[i] < (val0 - GMT_CONV_LIMIT) || knots[i] > (val1 + GMT_CONV_LIMIT)) continue; /* Outside the range */ if (GMT->current.setting.map_frame_type & GMT_IS_INSIDE && (fabs (knots[i] - val0) < GMT_CONV_LIMIT || fabs (knots[i] - val1) < GMT_CONV_LIMIT)) continue; /* Skip annotation on edges when MAP_FRAME_TYPE = inside */ if (gmt_skip_second_annot (k, knots[i], knots_p, np, primary)) continue; /* Minor tick marks skipped when coinciding with major */ x = (*xyz_fwd) (GMT, knots[i]); /* Convert to inches on the page */ if (horizontal) PSL_plotsegment (PSL, x, 0.0, x, ((neg) ? -1.0 : 1.0) * GMT->current.setting.map_tick_length[k]); else PSL_plotsegment (PSL, 0.0, x, ((neg) ? -1.0 : 1.0) * GMT->current.setting.map_tick_length[k], x); } } /* Then do annotations too - here just set text height/width parameters in PostScript */ if (do_annot) { annot_pos = (T->type == 'A' || T->type == 'I') ? 1 : 0; /* 1 means lower annotation, 0 means upper (close to axis) */ font = GMT->current.setting.font_annot[annot_pos]; /* Set the font to use */ form = GMT_setfont (GMT, &font); PSL_command (PSL, "/PSL_AH%d 0\n", annot_pos); for (i = 0; i < nx1; i++) { if (GMT_annot_pos (GMT, val0, val1, T, &knots[i], &t_use)) continue; /* Outside range */ if (axis == GMT_Z && fabs (knots[i] - GMT->current.proj.z_level) < GMT_CONV_LIMIT) continue; /* Skip z annotation coinciding with z-level plane */ if (GMT->current.setting.map_frame_type & GMT_IS_INSIDE && (fabs (knots[i] - val0) < GMT_CONV_LIMIT || fabs (knots[i] - val1) < GMT_CONV_LIMIT)) continue; /* Skip annotation on edges when MAP_FRAME_TYPE = inside */ if (!is_interval && gmt_skip_second_annot (k, knots[i], knots_p, np, primary)) continue; /* Secondary annotation skipped when coinciding with primary annotation */ if (label_c && label_c[i] && label_c[i][0]) strncpy (string, label_c[i], GMT_LEN256); else GMT_get_coordinate_label (GMT, string, &GMT->current.plot.calclock, format, T, knots[i]); /* Get annotation string */ PSL_deftextdim (PSL, ortho ? "-w" : "-h", font.size, string); PSL_command (PSL, "mx\n"); /* Update the longest annotation */ } PSL_command (PSL, "def\n"); if (annot_pos == 0) PSL_command (PSL, "/PSL_A0_y PSL_A0_y %d add ", psl_iz (PSL, GMT->current.setting.map_annot_offset[annot_pos])); else PSL_command (PSL, "/PSL_A1_y PSL_A0_y PSL_A1_y mx %d add ", psl_iz (PSL, GMT->current.setting.map_annot_offset[annot_pos])); if (faro) PSL_command (PSL, "PSL_AH%d add ", annot_pos); PSL_command (PSL, "def\n"); for (i = 0; i < nx1; i++) { if (GMT_annot_pos (GMT, val0, val1, T, &knots[i], &t_use)) continue; /* Outside range */ if (axis == GMT_Z && fabs (knots[i] - GMT->current.proj.z_level) < GMT_CONV_LIMIT) continue; /* Skip z annotation coinciding with z-level plane */ if (GMT->current.setting.map_frame_type & GMT_IS_INSIDE && (fabs (knots[i] - val0) < GMT_CONV_LIMIT || fabs (knots[i] - val1) < GMT_CONV_LIMIT)) continue; /* Skip annotation on edges when MAP_FRAME_TYPE = inside */ if (!is_interval && gmt_skip_second_annot (k, knots[i], knots_p, np, primary)) continue; /* Secondary annotation skipped when coinciding with primary annotation */ x = (*xyz_fwd) (GMT, t_use); /* Convert to inches on the page */ /* Move to new anchor point */ PSL_command (PSL, "%d PSL_A%d_y MM\n", psl_iz (PSL, x), annot_pos); if (label_c && label_c[i] && label_c[i][0]) strncpy (string, label_c[i], GMT_LEN256); else GMT_get_coordinate_label (GMT, string, &GMT->current.plot.calclock, format, T, knots[i]); /* Get annotation string */ PSL_plottext (PSL, 0.0, 0.0, -font.size, string, (ortho == horizontal) ? 90.0 : 0.0, ortho ? PSL_MR : PSL_BC, form); } if (!faro) PSL_command (PSL, "/PSL_A%d_y PSL_A%d_y PSL_AH%d add def\n", annot_pos, annot_pos, annot_pos); } if (nx) GMT_free (GMT, knots); if (label_c) { for (i = 0; i < nx; i++) if (label_c[i]) free (label_c[i]); GMT_free (GMT, label_c); } } if (np) GMT_free (GMT, knots_p); /* Finally do axis label */ if (A->label[0] && annotate && !GMT_axis_is_geo (GMT, axis)) { form = GMT_setfont (GMT, &GMT->current.setting.font_label); PSL_command (PSL, "/PSL_LH "); PSL_deftextdim (PSL, "-h", GMT->current.setting.font_label.size, "M"); PSL_command (PSL, "def\n"); PSL_command (PSL, "/PSL_L_y PSL_A0_y PSL_A1_y mx %d add %sdef\n", psl_iz (PSL, GMT->current.setting.map_label_offset), (neg == horizontal) ? "PSL_LH add " : ""); /* Move to new anchor point */ PSL_command (PSL, "%d PSL_L_y MM\n", psl_iz (PSL, 0.5 * length)); PSL_plottext (PSL, 0.0, 0.0, -GMT->current.setting.font_label.size, A->label, horizontal ? 0.0 : 90.0, PSL_BC, form); } else PSL_command (PSL, "/PSL_LH 0 def /PSL_L_y PSL_A0_y PSL_A1_y mx def\n"); if (axis == GMT_X) PSL_comment (PSL, below ? "End of lower x-axis\n" : "End of upper x-axis\n"); else if (axis == GMT_Y) PSL_comment (PSL, below ? "End of left y-axis\n" : "End of right y-axis\n"); else PSL_comment (PSL, below ? "End of front z-axis\n" : "End of back z-axis\n"); PSL_setorigin (PSL, -x0, -y0, 0.0, PSL_INV); } void gmt_map_latline (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lat, double west, double east) /* Draws a line of constant latitude */ { uint64_t nn; double *llon = NULL, *llat = NULL; nn = GMT_latpath (GMT, lat, west, east, &llon, &llat); GMT->current.plot.n = GMT_geo_to_xy_line (GMT, llon, llat, nn); if (GMT->current.plot.n > 1) { /* Need at least 2 points for a line */ PSL_comment (PSL, "Lat = %g\n", lat); if (GMT->current.map.parallel_straight) { /* Simplify to a 2-point straight line */ GMT->current.plot.x[1] = GMT->current.plot.x[GMT->current.plot.n-1]; GMT->current.plot.y[1] = GMT->current.plot.y[GMT->current.plot.n-1]; GMT->current.plot.pen[1] = GMT->current.plot.pen[GMT->current.plot.n-1]; GMT->current.plot.n = 2; } GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); } GMT_free (GMT, llon); GMT_free (GMT, llat); } void gmt_map_lonline (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lon, double south, double north) /* Draws a line of constant longitude */ { uint64_t nn; double *llon = NULL, *llat = NULL; nn = GMT_lonpath (GMT, lon, south, north, &llon, &llat); GMT->current.plot.n = GMT_geo_to_xy_line (GMT, llon, llat, nn); if (GMT->current.plot.n > 1) { /* Need at least 2 points for a line */ PSL_comment (PSL, "Lon = %g\n", lon); if (GMT->current.map.meridian_straight) { /* Simplify to a 2-point straight line */ GMT->current.plot.x[1] = GMT->current.plot.x[GMT->current.plot.n-1]; GMT->current.plot.y[1] = GMT->current.plot.y[GMT->current.plot.n-1]; GMT->current.plot.pen[1] = GMT->current.plot.pen[GMT->current.plot.n-1]; GMT->current.plot.n = 2; } GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); } GMT_free (GMT, llon); GMT_free (GMT, llat); } void GMT_linearx_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { double *x = NULL, ys, yn, p_cap = 0.0, cap_start[2] = {0.0, 0.0}, cap_stop[2] = {0.0, 0.0}; unsigned int idup = 0, i, nx; bool cap = false; /* Do we have duplicate e and w boundaries ? */ idup = (GMT_IS_AZIMUTHAL(GMT) && doubleAlmostEqual(e-w, 360.0)) ? 1 : 0; if (GMT_POLE_IS_POINT(GMT)) { /* Might have two separate domains of gridlines */ if (GMT->current.proj.projection == GMT_POLAR) { /* Different for polar graphs since "lat" = 0 is at the center */ ys = cap_stop[0] = cap_stop[1] = p_cap = 90.0 - GMT->current.setting.map_polar_cap[0]; yn = n; cap_start[0] = cap_start[1] = 0.0; } else { p_cap = GMT->current.setting.map_polar_cap[0]; ys = MAX (s, -p_cap); yn = MIN (n, p_cap); cap_start[0] = s; cap_stop[0] = -p_cap ; cap_start[1] = p_cap; cap_stop[1] = n; } cap = !doubleAlmostEqual (GMT->current.setting.map_polar_cap[0], 90.0); } else { ys = s; yn = n; } nx = GMT_linear_array (GMT, w, e, dval, GMT->current.map.frame.axis[GMT_X].phase, &x); for (i = 0; i < nx - idup; i++) gmt_map_lonline (GMT, PSL, x[i], ys, yn); if (nx) GMT_free (GMT, x); if (cap) { /* Also draw the polar cap(s) */ nx = 0; if (s < -GMT->current.setting.map_polar_cap[0]) { /* Must draw some or all of the S polar cap */ nx = GMT_linear_array (GMT, w, e, GMT->current.setting.map_polar_cap[1], GMT->current.map.frame.axis[GMT_X].phase, &x); for (i = 0; i < nx - idup; i++) gmt_map_lonline (GMT, PSL, x[i], cap_start[0], cap_stop[0]); gmt_map_latline (GMT, PSL, -p_cap, w, e); } if (n > GMT->current.setting.map_polar_cap[0]) { /* Must draw some or all of the N polar cap */ if (nx == 0) nx = GMT_linear_array (GMT, w, e, GMT->current.setting.map_polar_cap[1], GMT->current.map.frame.axis[GMT_X].phase, &x); for (i = 0; i < nx - idup; i++) gmt_map_lonline (GMT, PSL, x[i], cap_start[1], cap_stop[1]); gmt_map_latline (GMT, PSL, p_cap, w, e); } if (nx) GMT_free (GMT, x); } } void GMT_linearx_oblgrid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { /* x gridlines in oblique coordinates for all but the Oblique Mercator projection [which already is oblique] */ double *x = NULL, *lon = NULL, *lat = NULL, *lat_obl = NULL, tval, p_cap, s_cap; unsigned int idup = 0, i, j, k, nx, np, nc1 = 0, nc2, npc, np1; bool cap = false; /* Ideally we should determine the w/e/s/n of the oblique coordinates but here we will simply * create oblique coordinates for the full 0/360/-90/90, convert to regular coordinates and * then truncate points outside the actual w/e/s/n */ /* Do we have duplicate e and w boundaries ? */ p_cap = fabs (GMT->current.setting.map_polar_cap[0]); s_cap = -p_cap; idup = (GMT_IS_AZIMUTHAL(GMT)) ? 1 : 0; cap = !doubleAlmostEqual (p_cap, 90.0); /* true if we have a polar cap specified */ tval = (n - s) * GMT->current.setting.map_line_step / GMT->current.map.height; nx = GMT_linear_array (GMT, 0.0, TWO_PI, D2R * dval, D2R * GMT->current.map.frame.axis[GMT_X].phase, &x); np = GMT_linear_array (GMT, -90.0, 90.0, tval, 0.0, &lat_obl); np1 = nc2 = np - 1; /* Nominal number of points in path */ lon = GMT_memory (GMT, NULL, np+2, double); /* Allow 2 more slots for possibly inserted cap-latitudes */ lat = GMT_memory (GMT, NULL, np+2, double); for (i = 0; i < nx - idup; i++) { /* For each oblique meridian to draw */ /* Create lon,lat arrays of oblique coordinates for this meridian */ for (k = j = 0; k < np; k++, j++) { GMT_iobl (GMT, &lon[j], &lat[j], x[i], D2R * lat_obl[k]); /* Get regular coordinates of this point */ lon[j] *= R2D; lat[j] *= R2D; /* Convert back to degrees */ if (lat_obl[k] < s_cap && k < np1 && lat_obl[k+1] > s_cap) { /* Must insert S pole cap latitude point */ j++; GMT_iobl (GMT, &lon[j], &lat[j], x[i], D2R * s_cap); lon[j] *= R2D; lat[j] *= R2D; /* Back to degrees */ nc1 = j; } else if (lat_obl[k] < p_cap && k < np1 && lat_obl[k+1] > p_cap) { /* Must insert N pole cap latitude point */ j++; GMT_iobl (GMT, &lon[j], &lat[j], x[i], D2R * p_cap); lon[j] *= R2D; lat[j] *= R2D; /* Back to degrees */ nc2 = j; } } if (cap) { /* Only plot the line between the two polar caps */ npc = nc2 - nc1 + 1; /* Number of points along meridian bounded by caps */ if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, &lon[nc1], &lat[nc1], npc)) == 0) continue; } else { /* No polar cap in effect, plot entire meridian */ if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, j)) == 0) continue; } GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); } if (nx) GMT_free (GMT, x); if (cap) { /* Draw the polar cap(s) meridians with a separate lon spacing */ nx = GMT_linear_array (GMT, 0.0, TWO_PI, D2R * GMT->current.setting.map_polar_cap[1], D2R * GMT->current.map.frame.axis[GMT_X].phase, &x); for (i = 0; i < nx - idup; i++) { for (k = j = 0; k < np; k++, j++) { GMT_iobl (GMT, &lon[j], &lat[j], x[i], D2R * lat_obl[k]); /* Get regular coordinates of this point */ lon[j] *= R2D; lat[j] *= R2D; /* Back to degrees */ if (lat_obl[k] < s_cap && k < np1 && lat_obl[k+1] > s_cap) { /* Must insert S pole cap latitude point */ j++; GMT_iobl (GMT, &lon[j], &lat[j], x[i], D2R * s_cap); lon[j] *= R2D; lat[j] *= R2D; /* Back to degrees */ nc1 = j; } else if (lat_obl[k] < p_cap && k < np1 && lat_obl[k+1] > p_cap) { /* Must insert N pole cap latitude point */ j++; GMT_iobl (GMT, &lon[j], &lat[j], x[i], D2R * p_cap); lon[j] *= R2D; lat[j] *= R2D; /* Back to degrees */ nc2 = j; } } if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, nc1+1)) > 0) GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, &lon[nc2], &lat[nc2], j-nc2)) > 0) GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); } if (nx) GMT_free (GMT, x); } GMT_free (GMT, lat_obl); GMT_free (GMT, lon); GMT_free (GMT, lat); } void gmt_lineary_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { double *y = NULL; unsigned int i, ny; if (GMT->current.proj.z_down) { ny = GMT_linear_array (GMT, 0.0, n-s, dval, GMT->current.map.frame.axis[GMT_Y].phase, &y); for (i = 0; i < ny; i++) y[i] = GMT->common.R.wesn[YHI] - y[i]; /* These are the radial values needed for positioning */ } else ny = GMT_linear_array (GMT, s, n, dval, GMT->current.map.frame.axis[GMT_Y].phase, &y); for (i = 0; i < ny; i++) gmt_map_latline (GMT, PSL, y[i], w, e); if (ny) GMT_free (GMT, y); } void gmt_x_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double s, double n, double *x, unsigned int nx) { unsigned int i; double x1, y1, x2, y2; for (i = 0; i < nx; i++) { GMT_geo_to_xy (GMT, x[i], s, &x1, &y1); GMT_geo_to_xy (GMT, x[i], n, &x2, &y2); PSL_plotsegment (PSL, x1, y1, x2, y2); } } void GMT_lineary_oblgrid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { /* y gridlines in oblique coordinates for all but the Oblique Mercator projection [which already is oblique] */ double *y = NULL, *lon = NULL, *lon_obl = NULL, *lat = NULL, tval, p_cap; bool cap; unsigned int i, k, ny, np; /* Ideally we should determine the w/e/s/n of the oblique coordinates but here we will simply * create oblique coordinates for the full 0/360/-90/90, convert to regular coordinates and * then truncate points outside the actual w/e/s/n */ ny = GMT_linear_array (GMT, -M_PI_2, M_PI_2, D2R * dval, D2R * GMT->current.map.frame.axis[GMT_Y].phase, &y); tval = (e - w) * GMT->current.setting.map_line_step / GMT->current.map.width; np = GMT_linear_array (GMT, 0.0, TWO_PI, D2R * tval, 0.0, &lon_obl); lon = GMT_memory (GMT, NULL, np+2, double); /* Allow 2 more slots for possibly inserted cap-latitudes */ lat = GMT_memory (GMT, NULL, np+2, double); for (i = 0; i < ny; i++) { for (k = 0; k < np; k++) { GMT_iobl (GMT, &lon[k], &lat[k], lon_obl[k], y[i]); /* Get regular coordinates of this point */ lon[k] *= R2D; lat[k] *= R2D; /* Convert to degrees */ } if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, np)) == 0) continue; GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); } if (ny) GMT_free (GMT, y); p_cap = fabs (GMT->current.setting.map_polar_cap[0]); cap = !doubleAlmostEqual (p_cap, 90.0); /* true if we have a polar cap specified */ if (cap) { /* Draw the polar cap(s) with a separate spacing */ p_cap = D2R * GMT->current.setting.map_polar_cap[0]; for (k = 0; k < np; k++) { /* S polar cap */ GMT_iobl (GMT, &lon[k], &lat[k], lon_obl[k], -p_cap); /* Get regular coordinates of this point */ lon[k] *= R2D; lat[k] *= R2D; /* Convert to degrees */ } if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, np)) > 0) GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); for (k = 0; k < np; k++) { /* N polar cap */ GMT_iobl (GMT, &lon[k], &lat[k], lon_obl[k], p_cap); /* Get regular coordinates of this point */ lon[k] *= R2D; lat[k] *= R2D; /* Convert to degrees */ } if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, np)) > 0) GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); } GMT_free (GMT, lon_obl); GMT_free (GMT, lon); GMT_free (GMT, lat); } void gmt_y_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double *y, unsigned int ny) { unsigned int i; double x1, y1, x2, y2; for (i = 0; i < ny; i++) { GMT_geo_to_xy (GMT, w, y[i], &x1, &y1); GMT_geo_to_xy (GMT, e, y[i], &x2, &y2); PSL_plotsegment (PSL, x1, y1, x2, y2); } } void gmt_timex_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, unsigned int item) { unsigned int nx; double *x = NULL; nx = GMT_time_array (GMT, w, e, &GMT->current.map.frame.axis[GMT_X].item[item], &x); gmt_x_grid (GMT, PSL, s, n, x, nx); if (nx) GMT_free (GMT, x); } void gmt_timey_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, unsigned int item) { unsigned int ny; double *y = NULL; ny = GMT_time_array (GMT, s, n, &GMT->current.map.frame.axis[GMT_Y].item[item], &y); gmt_y_grid (GMT, PSL, w, e, y, ny); if (ny) GMT_free (GMT, y); } void gmt_logx_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { unsigned int nx; double *x = NULL; nx = GMT_log_array (GMT, w, e, dval, &x); gmt_x_grid (GMT, PSL, s, n, x, nx); if (nx) GMT_free (GMT, x); } void gmt_logy_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { unsigned int ny; double *y = NULL; ny = GMT_log_array (GMT, s, n, dval, &y); gmt_y_grid (GMT, PSL, w, e, y, ny); if (ny) GMT_free (GMT, y); } void gmt_powx_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { unsigned int nx; double *x = NULL; nx = GMT_pow_array (GMT, w, e, dval, 0, &x); gmt_x_grid (GMT, PSL, s, n, x, nx); if (nx) GMT_free (GMT, x); } void gmt_powy_grid (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, double dval) { unsigned int ny; double *y = NULL; ny = GMT_pow_array (GMT, s, n, dval, 1, &y); gmt_y_grid (GMT, PSL, w, e, y, ny); if (ny) GMT_free (GMT, y); } /* FANCY RECTANGULAR PROJECTION MAP BOUNDARY */ void gmt_fancy_frame_offset (struct GMT_CTRL *GMT, double angle, double shift[2]) { /* Given the angle of the axis, return the coordinate adjustments needed to * shift in order to plot the outer 1-2 parallel frame lines (shift[0|1] */ double s, c; sincos (angle, &s, &c); shift[0] = GMT->current.setting.map_frame_width * s; shift[1] = -GMT->current.setting.map_frame_width * c; } void gmt_fancy_frame_straightlon_checkers (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, bool secondary_too) { /* Plot checkers along straight longitude boundaries */ int i, k, nx; unsigned int shade, item[2] = {GMT_TICK_UPPER, GMT_TICK_LOWER}; double dx, w1, val, v1, v2, x1, x2, y1, y2, shift_s[2], shift_n[2], scale[2]; struct GMT_PLOT_AXIS_ITEM *T = NULL; scale[0] = (secondary_too) ? 0.5 : 1.0; scale[1] = 1.5; GMT_geo_to_xy (GMT, e, s, &x1, &y1); GMT_geo_to_xy (GMT, w, s, &x2, &y2); gmt_fancy_frame_offset (GMT, d_atan2 (y2 - y1, x2 - x1), shift_s); GMT_geo_to_xy (GMT, w, n, &x1, &y1); GMT_geo_to_xy (GMT, e, n, &x2, &y2); gmt_fancy_frame_offset (GMT, d_atan2 (y2 - y1, x2 - x1), shift_n); for (k = 0; k < 1 + secondary_too; k++) { T = &GMT->current.map.frame.axis[GMT_X].item[item[k]]; if (T->active) { dx = GMT_get_map_interval (GMT, T); shade = (urint (floor ((w - GMT->current.map.frame.axis[GMT_X].phase)/ dx))) % 2; w1 = floor ((w - GMT->current.map.frame.axis[GMT_X].phase)/ dx) * dx + GMT->current.map.frame.axis[GMT_X].phase; nx = (w1 > e) ? -1 : irint (((e - w1) / dx + GMT_SMALL)); for (i = 0; i <= nx; i++) { shade = !shade; val = w1 + i * dx; v1 = MAX (val, w); v2 = MIN (val + dx, e); if (v2 - v1 < GMT_CONV_LIMIT) continue; PSL_setcolor (PSL, shade ? GMT->current.setting.map_frame_pen.rgb : GMT->PSL->init.page_rgb, PSL_IS_STROKE); if (GMT->current.map.frame.side[S_SIDE]) { GMT_geo_to_xy (GMT, v1, s, &x1, &y1); GMT_geo_to_xy (GMT, v2, s, &x2, &y2); PSL_plotsegment (PSL, x1-0.5*scale[k]*shift_s[0], y1-0.5*scale[k]*shift_s[1], x2-0.5*scale[k]*shift_s[0], y2-0.5*scale[k]*shift_s[1]); } if (GMT->current.map.frame.side[N_SIDE]) { GMT_geo_to_xy (GMT, v1, n, &x1, &y1); GMT_geo_to_xy (GMT, v2, n, &x2, &y2); PSL_plotsegment (PSL, x1-0.5*scale[k]*shift_n[0], y1-0.5*scale[k]*shift_n[1], x2-0.5*scale[k]*shift_n[0], y2-0.5*scale[k]*shift_n[1]); } } } } } void gmt_fancy_frame_curvedlon_checkers (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, bool secondary_too) { /* Plot checkers along curved longitude boundaries */ int i, k, nx; unsigned int shade, item[2] = {GMT_TICK_UPPER, GMT_TICK_LOWER}; double dx, w1, v1, v2, val, x1, x2, y1, y2, az1, az2, dr, scale[2], radius_s, radius_n; struct GMT_PLOT_AXIS_ITEM *T; scale[0] = (secondary_too) ? 0.5 : 1.0; scale[1] = 1.5; dr = 0.5 * GMT->current.setting.map_frame_width; GMT_geo_to_xy (GMT, w, s, &x1, &y1); GMT_geo_to_xy (GMT, w, n, &x2, &y2); radius_s = hypot (x1 - GMT->current.proj.c_x0, y1 - GMT->current.proj.c_y0); radius_n = hypot (x2 - GMT->current.proj.c_x0, y2 - GMT->current.proj.c_y0); for (k = 0; k < 1 + secondary_too; k++) { T = &GMT->current.map.frame.axis[GMT_X].item[item[k]]; if (T->active) { dx = GMT_get_map_interval (GMT, T); shade = urint (floor ((w - GMT->current.map.frame.axis[GMT_X].phase) / dx)) % 2; w1 = floor ((w - GMT->current.map.frame.axis[GMT_X].phase)/dx) * dx + GMT->current.map.frame.axis[GMT_X].phase; nx = (w1 > e) ? -1 : irint ((e-w1) / dx + GMT_SMALL); for (i = 0; i <= nx; i++) { shade = !shade; val = w1 + i * dx; v1 = MAX (val, w); v2 = MIN (val + dx, e); if (v2 - v1 < GMT_CONV_LIMIT) continue; PSL_setcolor (PSL, shade ? GMT->current.setting.map_frame_pen.rgb : GMT->PSL->init.page_rgb, PSL_IS_STROKE); if (GMT->current.map.frame.side[S_SIDE]) { GMT_geo_to_xy (GMT, v2, s, &x1, &y1); GMT_geo_to_xy (GMT, v1, s, &x2, &y2); az1 = d_atan2d (y1 - GMT->current.proj.c_y0, x1 - GMT->current.proj.c_x0); az2 = d_atan2d (y2 - GMT->current.proj.c_y0, x2 - GMT->current.proj.c_x0); if (GMT->current.proj.north_pole) { if (az1 < az2) az1 += 360.0; PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius_s+scale[k]*dr, az2, az1, PSL_MOVE + PSL_STROKE); } else { if (az2 < az1) az2 += 360.0; PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius_s-scale[k]*dr, az1, az2, PSL_MOVE + PSL_STROKE); } } if (GMT->current.map.frame.side[N_SIDE]) { GMT_geo_to_xy (GMT, v2, n, &x1, &y1); GMT_geo_to_xy (GMT, v1, n, &x2, &y2); az1 = d_atan2d (y1 - GMT->current.proj.c_y0, x1 - GMT->current.proj.c_x0); az2 = d_atan2d (y2 - GMT->current.proj.c_y0, x2 - GMT->current.proj.c_x0); if (GMT->current.proj.north_pole) { if (az1 < az2) az1 += 360.0; PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius_n-scale[k]*dr, az2, az1, PSL_MOVE + PSL_STROKE); } else { if (az2 < az1) az2 += 360.0; PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius_n+scale[k]*dr, az1, az2, PSL_MOVE + PSL_STROKE); } } } } } } void gmt_fancy_frame_straightlat_checkers (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, bool secondary_too) { /* Plot checkers along straight latitude boundaries */ int i, k, ny; unsigned int shade, item[2] = {GMT_TICK_UPPER, GMT_TICK_LOWER}; double dy, s1, val, v1, v2, x1, x2, y1, y2, shift_w[2], shift_e[2], scale[2]; struct GMT_PLOT_AXIS_ITEM *T = NULL; scale[0] = (secondary_too) ? 0.5 : 1.0; scale[1] = 1.5; GMT_geo_to_xy (GMT, w, s, &x1, &y1); GMT_geo_to_xy (GMT, w, n, &x2, &y2); gmt_fancy_frame_offset (GMT, d_atan2 (y2 - y1, x2 - x1), shift_w); GMT_geo_to_xy (GMT, e, s, &x1, &y1); GMT_geo_to_xy (GMT, e, n, &x2, &y2); gmt_fancy_frame_offset (GMT, d_atan2 (y2 - y1, x2 - x1), shift_e); /* Tick S-N axes */ for (k = 0; k < 1 + secondary_too; k++) { T = &GMT->current.map.frame.axis[GMT_Y].item[item[k]]; if (T->active) { dy = GMT_get_map_interval (GMT, T); shade = urint (floor ((s - GMT->current.map.frame.axis[GMT_Y].phase) / dy)) % 2; s1 = floor((s - GMT->current.map.frame.axis[GMT_Y].phase)/dy) * dy + GMT->current.map.frame.axis[GMT_Y].phase; ny = (s1 > n) ? -1 : irint ((n-s1) / dy + GMT_SMALL); for (i = 0; i <= ny; i++) { shade = !shade; val = s1 + i * dy; v1 = MAX (val, s); v2 = MIN (val + dy, n); if (v2 - v1 < GMT_CONV_LIMIT) continue; PSL_setcolor (PSL, shade ? GMT->current.setting.map_frame_pen.rgb : GMT->PSL->init.page_rgb, PSL_IS_STROKE); if (GMT->current.map.frame.side[W_SIDE]) { GMT_geo_to_xy (GMT, w, v1, &x1, &y1); GMT_geo_to_xy (GMT, w, v2, &x2, &y2); PSL_plotsegment (PSL, x1-0.5*scale[k]*shift_w[0], y1-0.5*scale[k]*shift_w[1], x2-0.5*scale[k]*shift_w[0], y2-0.5*scale[k]*shift_w[1]); } if (GMT->current.map.frame.side[E_SIDE]) { GMT_geo_to_xy (GMT, e, v1, &x1, &y1); GMT_geo_to_xy (GMT, e, v2, &x2, &y2); PSL_plotsegment (PSL, x1+0.5*scale[k]*shift_e[0], y1+0.5*scale[k]*shift_e[1], x2+0.5*scale[k]*shift_e[0], y2+0.5*scale[k]*shift_e[1]); } } } } } void gmt_fancy_frame_straight_outline (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lonA, double latA, double lonB, double latB, unsigned int side, bool secondary_too) { unsigned int k, kn = 1; double scale = 1.0, x[2], y[2], angle, s, c, dx, dy, Ldx, Ldy; if (!GMT->current.map.frame.side[side]) return; /* Do not draw this frame side */ if (secondary_too) { scale = 0.5; ++kn; } GMT_geo_to_xy (GMT, lonA, latA, &x[0], &y[0]); GMT_geo_to_xy (GMT, lonB, latB, &x[1], &y[1]); angle = d_atan2 (y[1] - y[0], x[1] - x[0]); sincos (angle, &s, &c); Ldx = (GMT->current.setting.map_frame_type == GMT_IS_ROUNDED) ? 0.0 : GMT->current.setting.map_frame_width * c; Ldy = (GMT->current.setting.map_frame_type == GMT_IS_ROUNDED) ? 0.0 : GMT->current.setting.map_frame_width * s; dx = GMT->current.setting.map_frame_width * s; dy = -GMT->current.setting.map_frame_width * c; PSL_plotsegment (PSL, x[0]-Ldx, y[0]-Ldy, x[1]+Ldx, y[1]+Ldy); for (k = 0; k < kn; k++) { x[0] += scale*dx; y[0] += scale*dy; x[1] += scale*dx; y[1] += scale*dy; PSL_plotsegment (PSL, x[0]-Ldx, y[0]-Ldy, x[1]+Ldx, y[1]+Ldy); } } void gmt_fancy_frame_curved_outline (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lonA, double latA, double lonB, double latB, unsigned int side, bool secondary_too) { double scale[2] = {1.0, 1.0}, escl, x1, x2, y1, y2, radius, r_inc, az1, az2, da0, da, width, s; if (!GMT->current.map.frame.side[side]) return; if (secondary_too) scale[0] = scale[1] = 0.5; width = GMT->current.setting.map_frame_width; escl = (GMT->current.setting.map_frame_type == GMT_IS_ROUNDED) ? 0.0 : 1.0; /* Want rounded corners */ GMT_geo_to_xy (GMT, lonA, latA, &x1, &y1); GMT_geo_to_xy (GMT, lonB, latB, &x2, &y2); radius = hypot (x1 - GMT->current.proj.c_x0, y1 - GMT->current.proj.c_y0); s = ((GMT->current.proj.north_pole && side == 2) || (!GMT->current.proj.north_pole && side == 0)) ? -1.0 : +1.0; /* North: needs shorter radius. South: Needs longer radius (opposite in S hemi) */ r_inc = s*scale[0] * width; if (GMT_IS_AZIMUTHAL(GMT) && GMT_360_RANGE (lonA, lonB)) { /* Full 360-degree cirle */ PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius, 0.0, 360.0, PSL_MOVE + PSL_STROKE); PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius + r_inc, 0.0, 360.0, PSL_MOVE + PSL_STROKE); if (secondary_too) PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius + 2.0 * r_inc, 0.0, 360.0, PSL_MOVE + PSL_STROKE); } else { az1 = d_atan2d (y1 - GMT->current.proj.c_y0, x1 - GMT->current.proj.c_x0); az2 = d_atan2d (y2 - GMT->current.proj.c_y0, x2 - GMT->current.proj.c_x0); if (!GMT->current.proj.north_pole) double_swap (az1, az2); /* In S hemisphere, must draw in opposite direction */ while (az1 < 0.0) az1 += 360.0; /* Wind az1 to be in the 0-360 range */ while (az2 < az1) az2 += 360.0; /* Likewise ensure az1 > az1 and is now in the 0-720 range */ da0 = R2D * escl * width /radius; da = R2D * escl * width / (radius + r_inc); PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius, az1-da0, az2+da0, PSL_MOVE + PSL_STROKE); PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius + r_inc, az1-da, az2+da, PSL_MOVE + PSL_STROKE); if (secondary_too) { r_inc *= 2.0; da = R2D * escl * width / (radius + r_inc); PSL_plotarc (PSL, GMT->current.proj.c_x0, GMT->current.proj.c_y0, radius + r_inc, az1-da, az2+da, PSL_MOVE + PSL_STROKE); } } } void gmt_rounded_framecorners (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, bool secondary_too) { unsigned int k, kn; double x1, y1, x2, y2, anglew, anglee, x, y, width; if (GMT->current.setting.map_frame_type != GMT_IS_ROUNDED) return; /* Only do this if rounded corners are requested */ GMT_geo_to_xy (GMT, w, n, &x1, &y1); GMT_geo_to_xy (GMT, w, s, &x2, &y2); anglew = d_atan2d (y2 - y1, x2 - x1); GMT_geo_to_xy (GMT, e, s, &x1, &y1); GMT_geo_to_xy (GMT, e, n, &x2, &y2); anglee = d_atan2d (y2 - y1, x2 - x1); width = ((secondary_too) ? 0.5 : 1.0) * fabs (GMT->current.setting.map_frame_width); kn = (secondary_too) ? 2 : 1; for (k = 0; k < kn; k++) { if (GMT->current.map.frame.side[S_SIDE] && GMT->current.map.frame.side[E_SIDE]) { GMT_geo_to_xy (GMT, e, s, &x, &y); PSL_plotarc (PSL, x, y, (k+1)*width, 180.0+anglee, 270.0+anglee, PSL_MOVE + PSL_STROKE); } if (GMT->current.map.frame.side[E_SIDE] && GMT->current.map.frame.side[N_SIDE]) { GMT_geo_to_xy (GMT, e, n, &x, &y); PSL_plotarc (PSL, x, y, (k+1)*width, 270.0+anglee, 360.0+anglee, PSL_MOVE + PSL_STROKE); } if (GMT->current.map.frame.side[N_SIDE] && GMT->current.map.frame.side[W_SIDE]) { GMT_geo_to_xy (GMT, w, n, &x, &y); PSL_plotarc (PSL, x, y, (k+1)*width, 180.0+anglew, 270.0+anglew, PSL_MOVE + PSL_STROKE); } if (GMT->current.map.frame.side[W_SIDE] && GMT->current.map.frame.side[S_SIDE]) { GMT_geo_to_xy (GMT, w, s, &x, &y); PSL_plotarc (PSL, x, y, (k+1)*width, 270.0+anglew, 360.0+anglew, PSL_MOVE + PSL_STROKE); } if ((GMT_IS_AZIMUTHAL(GMT) || GMT_IS_CONICAL(GMT)) && GMT->current.map.frame.side[W_SIDE] && GMT->current.map.frame.side[E_SIDE]) { /* Round off the pointy head? */ if (doubleAlmostEqual (GMT->common.R.wesn[YHI], 90.0)) { GMT_geo_to_xy (GMT, w, n, &x, &y); PSL_plotarc (PSL, x, y, (k+1)*width, anglee, 180.0+anglew, PSL_MOVE + PSL_STROKE); } else if (doubleAlmostEqual (GMT->common.R.wesn[YLO], -90.0)) { GMT_geo_to_xy (GMT, w, s, &x, &y); PSL_plotarc (PSL, x, y, (k+1)*width, anglew-90.0, anglee-90.0, PSL_MOVE + PSL_STROKE); } } } } void gmt_wesn_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { uint64_t i, np = 0; double *xx = NULL, *yy = NULL; GMT_setpen (GMT, &GMT->current.setting.map_frame_pen); if (GMT->current.map.frame.side[W_SIDE]) { /* West */ np = GMT_map_path (GMT, w, s, w, n, &xx, &yy); for (i = 0; i < np; i++) GMT_geo_to_xy (GMT, xx[i], yy[i], &xx[i], &yy[i]); PSL_plotline (PSL, xx, yy, (int)np, PSL_MOVE + PSL_STROKE); GMT_free (GMT, xx); GMT_free (GMT, yy); } if (GMT->current.map.frame.side[E_SIDE]) { /* East */ np = GMT_map_path (GMT, e, s, e, n, &xx, &yy); for (i = 0; i < np; i++) GMT_geo_to_xy (GMT, xx[i], yy[i], &xx[i], &yy[i]); PSL_plotline (PSL, xx, yy, (int)np, PSL_MOVE + PSL_STROKE); GMT_free (GMT, xx); GMT_free (GMT, yy); } if (GMT->current.map.frame.side[S_SIDE]) { /* South */ np = GMT_map_path (GMT, w, s, e, s, &xx, &yy); for (i = 0; i < np; i++) GMT_geo_to_xy (GMT, xx[i], yy[i], &xx[i], &yy[i]); PSL_plotline (PSL, xx, yy, (int)np, PSL_MOVE + PSL_STROKE); GMT_free (GMT, xx); GMT_free (GMT, yy); } if (GMT->current.map.frame.side[N_SIDE]) { /* North */ np = GMT_map_path (GMT, w, n, e, n, &xx, &yy); for (i = 0; i < np; i++) GMT_geo_to_xy (GMT, xx[i], yy[i], &xx[i], &yy[i]); PSL_plotline (PSL, xx, yy, (int)np, PSL_MOVE + PSL_STROKE); GMT_free (GMT, xx); GMT_free (GMT, yy); } } void gmt_fancy_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { double fat_pen, thin_pen; bool dual = false; unsigned int cap = PSL->internal.line_cap; if (!(GMT->current.setting.map_frame_type & GMT_IS_FANCY)) { /* Draw plain boundary and return */ gmt_wesn_map_boundary (GMT, PSL, w, e, s, n); return; } PSL_setcolor (PSL, GMT->current.setting.map_frame_pen.rgb, PSL_IS_STROKE); fat_pen = fabs (GMT->current.setting.map_frame_width) * GMT->session.u2u[GMT_INCH][GMT_PT]; if (GMT->current.map.frame.axis[GMT_Y].item[GMT_TICK_LOWER].active) { /* Need two-layer frame */ fat_pen *= 0.5; dual = true; } thin_pen = 0.1 * fat_pen; /* Draw frame checkers */ /* This needs to be done with BUTT cap since checker segments are drawn as heavy lines */ PSL_setlinewidth (PSL, fat_pen); PSL_setlinecap (PSL, PSL_BUTT_CAP); gmt_fancy_frame_straightlat_checkers (GMT, PSL, w, e, s, n, dual); gmt_fancy_frame_straightlon_checkers (GMT, PSL, w, e, s, n, dual); /* Draw the outline on top of the checkers */ /* Reset line cap, etc. */ PSL_setlinecap (PSL, cap); PSL_setcolor (PSL, GMT->current.setting.map_frame_pen.rgb, PSL_IS_STROKE); PSL_setlinewidth (PSL, thin_pen); gmt_fancy_frame_straight_outline (GMT, PSL, w, s, e, s, 0, dual); gmt_fancy_frame_straight_outline (GMT, PSL, e, s, e, n, 1, dual); gmt_fancy_frame_straight_outline (GMT, PSL, e, n, w, n, 2, dual); gmt_fancy_frame_straight_outline (GMT, PSL, w, n, w, s, 3, dual); gmt_rounded_framecorners (GMT, PSL, w, e, s, n, dual); } void gmt_rect_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double x0, double y0, double x1, double y1) { unsigned int cap = PSL->internal.line_cap; GMT_setpen (GMT, &GMT->current.setting.map_frame_pen); /* Temporarily change to square cap so rectangular frames have neat corners */ PSL_setlinecap (PSL, PSL_SQUARE_CAP); if (GMT->current.map.frame.side[W_SIDE]) PSL_plotsegment (PSL, x0, y0, x0, y1); /* West */ if (GMT->current.map.frame.side[E_SIDE]) PSL_plotsegment (PSL, x1, y0, x1, y1); /* East */ if (GMT->current.map.frame.side[S_SIDE]) PSL_plotsegment (PSL, x0, y0, x1, y0); /* South */ if (GMT->current.map.frame.side[N_SIDE]) PSL_plotsegment (PSL, x0, y1, x1, y1); /* North */ PSL_setlinecap (PSL, cap); /* Reset back to default */ } /* GMT_POLAR (S or N) PROJECTION MAP BOUNDARY */ void gmt_polar_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { bool dual = false; unsigned int cap = PSL->internal.line_cap; double thin_pen, fat_pen; if (GMT->common.R.oblique) { /* Draw rectangular boundary and return */ gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); return; } if (!GMT->current.proj.north_pole && s <= -90.0) /* Cannot have southern boundary */ GMT->current.map.frame.side[S_SIDE] = 0; if (GMT->current.proj.north_pole && n >= 90.0) /* Cannot have northern boundary */ GMT->current.map.frame.side[N_SIDE] = 0; if (GMT_360_RANGE (w, e) || doubleAlmostEqualZero (e, w)) GMT->current.map.frame.side[E_SIDE] = GMT->current.map.frame.side[W_SIDE] = 0; if (!(GMT->current.setting.map_frame_type & GMT_IS_FANCY)) { /* Draw plain boundary and return */ gmt_wesn_map_boundary (GMT, PSL, w, e, s, n); return; } /* Here draw fancy map boundary */ fat_pen = fabs (GMT->current.setting.map_frame_width) * GMT->session.u2u[GMT_INCH][GMT_PT]; if (GMT->current.map.frame.axis[GMT_Y].item[GMT_TICK_LOWER].active) { /* Need two-layer frame */ fat_pen *= 0.5; dual = true; } thin_pen = 0.1 * fat_pen; /* Draw frame checkers */ /* This needs to be done with BUTT cap since checker segments are drawn as heavy lines */ PSL_setlinewidth (PSL, fat_pen); PSL_setlinecap (PSL, PSL_BUTT_CAP); gmt_fancy_frame_straightlat_checkers (GMT, PSL, w, e, s, n, dual); gmt_fancy_frame_curvedlon_checkers (GMT, PSL, w, e, s, n, dual); /* Draw the outline on top of the checkers */ /* Reset line cap, etc. */ PSL_setlinecap (PSL, cap); PSL_setcolor (PSL, GMT->current.setting.map_frame_pen.rgb, PSL_IS_STROKE); PSL_setlinewidth (PSL, thin_pen); gmt_fancy_frame_curved_outline (GMT, PSL, w, s, e, s, 0, dual); gmt_fancy_frame_straight_outline (GMT, PSL, e, s, e, n, 1, dual); gmt_fancy_frame_curved_outline (GMT, PSL, w, n, e, n, 2, dual); gmt_fancy_frame_straight_outline (GMT, PSL, w, n, w, s, 3, dual); gmt_rounded_framecorners (GMT, PSL, w, e, s, n, dual); } /* CONIC PROJECTION MAP BOUNDARY */ void gmt_conic_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { bool dual = false; unsigned int cap = PSL->internal.line_cap; double thin_pen, fat_pen; if (GMT->common.R.oblique) { /* Draw rectangular boundary and return */ gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); return; } if (!GMT->current.proj.north_pole && s <= -90.0) /* Cannot have southern boundary */ GMT->current.map.frame.side[S_SIDE] = 0; if (GMT->current.proj.north_pole && n >= 90.0) /* Cannot have northern boundary */ GMT->current.map.frame.side[N_SIDE] = 0; if (!(GMT->current.setting.map_frame_type & GMT_IS_FANCY)) { /* Draw plain boundary and return */ gmt_wesn_map_boundary (GMT, PSL, w, e, s, n); return; } /* Here draw fancy map boundary */ fat_pen = fabs (GMT->current.setting.map_frame_width) * GMT->session.u2u[GMT_INCH][GMT_PT]; if (GMT->current.map.frame.axis[GMT_Y].item[GMT_TICK_LOWER].active) { /* Need two-layer frame */ fat_pen *= 0.5; dual = true; } thin_pen = 0.1 * fat_pen; /* Draw frame checkers */ /* This needs to be done with BUTT cap since checker segments are drawn as heavy lines */ PSL_setlinewidth (PSL, fat_pen); PSL_setlinecap (PSL, PSL_BUTT_CAP); gmt_fancy_frame_straightlat_checkers (GMT, PSL, w, e, s, n, dual); gmt_fancy_frame_curvedlon_checkers (GMT, PSL, w, e, s, n, dual); /* Draw the outline on top of the checkers */ /* Reset line cap, etc. */ PSL_setlinecap (PSL, cap); PSL_setcolor (PSL, GMT->current.setting.map_frame_pen.rgb, PSL_IS_STROKE); PSL_setlinewidth (PSL, thin_pen); gmt_fancy_frame_curved_outline (GMT, PSL, w, s, e, s, 0, dual); gmt_fancy_frame_straight_outline (GMT, PSL, e, s, e, n, 1, dual); gmt_fancy_frame_curved_outline (GMT, PSL, w, n, e, n, 2, dual); gmt_fancy_frame_straight_outline (GMT, PSL, w, n, w, s, 3, dual); gmt_rounded_framecorners (GMT, PSL, w, e, s, n, dual); } /* OBLIQUE MERCATOR PROJECTION MAP FUNCTIONS */ void gmt_oblmrc_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); } /* MOLLWEIDE and HAMMER-AITOFF EQUAL AREA PROJECTION MAP FUNCTIONS */ void gmt_ellipse_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { if (GMT->common.R.oblique) { /* Draw rectangular boundary and return */ gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); return; } if (GMT->common.R.wesn[YLO] <= -90.0) /* Cannot have southern boundary */ GMT->current.map.frame.side[S_SIDE] = 0; if (GMT->common.R.wesn[YHI] >= 90.0) /* Cannot have northern boundary */ GMT->current.map.frame.side[N_SIDE] = 0; gmt_wesn_map_boundary (GMT, PSL, w, e, s, n); } void gmt_basic_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { if (GMT->common.R.oblique) { /* Draw rectangular boundary and return */ gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); return; } gmt_wesn_map_boundary (GMT, PSL, w, e, s, n); } /* * GENERIC MAP PLOTTING FUNCTIONS */ int gmt_genper_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { uint64_t nr; if (GMT->common.R.oblique) { /* Draw rectangular boundary and return */ gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); return 0; } GMT_setpen (GMT, &GMT->current.setting.map_frame_pen); nr = GMT->current.map.n_lon_nodes + GMT->current.map.n_lat_nodes; if (nr >= GMT->current.plot.n_alloc) GMT_get_plot_array (GMT); if (GMT->current.proj.g_debug > 1) GMT_Report (GMT->parent, GMT_MSG_DEBUG, "genper_map_boundary nr = %" PRIu64 "\n", nr); GMT_genper_map_clip_path (GMT, nr, GMT->current.plot.x, GMT->current.plot.y); PSL_plotline (PSL, GMT->current.plot.x, GMT->current.plot.y, (int)nr, PSL_MOVE + PSL_STROKE); return 0; } void gmt_circle_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { if (GMT->common.R.oblique) { /* Draw rectangular boundary and return */ gmt_rect_map_boundary (GMT, PSL, 0.0, 0.0, GMT->current.proj.rect[XHI], GMT->current.proj.rect[YHI]); return; } GMT_setpen (GMT, &GMT->current.setting.map_frame_pen); PSL_plotarc (PSL, GMT->current.proj.r, GMT->current.proj.r, GMT->current.proj.r, 0.0, 360.0, PSL_MOVE + PSL_STROKE); } void gmt_theta_r_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { uint64_t i, nr; double a, da; double xx[2], yy[2]; GMT_setpen (GMT, &GMT->current.setting.map_frame_pen); if (GMT->current.proj.got_elevations) { if (doubleAlmostEqual (n, 90.0)) GMT->current.map.frame.side[N_SIDE] = 0; /* No donuts, please */ } else { if (GMT_IS_ZERO (s)) GMT->current.map.frame.side[S_SIDE] = 0; /* No donuts, please */ } if (GMT_360_RANGE (w, e) || doubleAlmostEqualZero (e, w)) GMT->current.map.frame.side[E_SIDE] = GMT->current.map.frame.side[W_SIDE] = 0; nr = GMT->current.map.n_lon_nodes; while (nr > GMT->current.plot.n_alloc) GMT_get_plot_array (GMT); da = fabs (GMT->common.R.wesn[XHI] - GMT->common.R.wesn[XLO]) / (nr - 1); if (GMT->current.map.frame.side[N_SIDE]) { for (i = 0; i < nr; i++) { a = GMT->common.R.wesn[XLO] + i * da; GMT_geo_to_xy (GMT, a, GMT->common.R.wesn[YHI], &GMT->current.plot.x[i], &GMT->current.plot.y[i]); } PSL_plotline (PSL, GMT->current.plot.x, GMT->current.plot.y, (int)nr, PSL_MOVE + PSL_STROKE); } if (GMT->current.map.frame.side[S_SIDE]) { for (i = 0; i < nr; i++) { a = GMT->common.R.wesn[XLO] + i * da; GMT_geo_to_xy (GMT, a, GMT->common.R.wesn[YLO], &GMT->current.plot.x[i], &GMT->current.plot.y[i]); } PSL_plotline (PSL, GMT->current.plot.x, GMT->current.plot.y, (int)nr, PSL_MOVE + PSL_STROKE); } if (GMT->current.map.frame.side[E_SIDE]) { GMT_geo_to_xy (GMT, GMT->common.R.wesn[XHI], GMT->common.R.wesn[YLO], &xx[0], &yy[0]); GMT_geo_to_xy (GMT, GMT->common.R.wesn[XHI], GMT->common.R.wesn[YHI], &xx[1], &yy[1]); PSL_plotline (PSL, xx, yy, 2, PSL_MOVE + PSL_STROKE); } if (GMT->current.map.frame.side[W_SIDE]) { GMT_geo_to_xy (GMT, GMT->common.R.wesn[XLO], GMT->common.R.wesn[YLO], &xx[0], &yy[0]); GMT_geo_to_xy (GMT, GMT->common.R.wesn[XLO], GMT->common.R.wesn[YHI], &xx[1], &yy[1]); PSL_plotline (PSL, xx, yy, 2, PSL_MOVE + PSL_STROKE); } } void gmt_map_tick (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double *xx, double *yy, unsigned int *sides, double *angles, unsigned int nx, unsigned int type, double len) { double angle, xl, yl, c, s, tick_length; unsigned int i; for (i = 0; i < nx; i++) { if (!GMT->current.proj.edge[sides[i]]) continue; if (!GMT->current.map.frame.side[sides[i]]) continue; if (!(GMT->current.setting.map_annot_oblique & 1) && ((type == 0 && (sides[i] % 2)) || (type == 1 && !(sides[i] % 2)))) continue; angle = ((GMT->current.setting.map_annot_oblique & 16) ? (sides[i] - 1) * 90.0 : angles[i]); sincosd (angle, &s, &c); tick_length = len; if (GMT->current.setting.map_annot_oblique & 8) { if (sides[i] % 2) { /* if (fabs (c) > cosd (GMT->current.setting.map_annot_min_angle)) continue; */ if (fabs (c) < sind (GMT->current.setting.map_annot_min_angle)) continue; tick_length /= fabs(c); } else { if (fabs (s) < sind (GMT->current.setting.map_annot_min_angle)) continue; tick_length /= fabs(s); } } xl = tick_length * c; yl = tick_length * s; PSL_plotsegment (PSL, xx[i], yy[i], xx[i]+xl, yy[i]+yl); } } void gmt_map_lontick (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lon, double south, double north, double len) { unsigned int i, nc; struct GMT_XINGS *xings = NULL; nc = GMT_map_loncross (GMT, lon, south, north, &xings); for (i = 0; i < nc; i++) gmt_map_tick (GMT, PSL, xings[i].xx, xings[i].yy, xings[i].sides, xings[i].angle, xings[i].nx, 0, len); if (nc) GMT_free (GMT, xings); } void gmt_map_lattick (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lat, double west, double east, double len) { unsigned int i, nc; struct GMT_XINGS *xings = NULL; nc = GMT_map_latcross (GMT, lat, west, east, &xings); for (i = 0; i < nc; i++) gmt_map_tick (GMT, PSL, xings[i].xx, xings[i].yy, xings[i].sides, xings[i].angle, xings[i].nx, 1, len); if (nc) GMT_free (GMT, xings); } bool gmt_annot_too_crowded (struct GMT_CTRL *GMT, double x, double y, unsigned int side) { /* Checks if the proposed annotation is too close to a previously plotted annotation */ unsigned int i; double d_min; if (GMT->current.setting.map_annot_min_spacing <= 0.0) return (false); for (i = 0, d_min = DBL_MAX; i < GMT_n_annotations[side]; i++) d_min = MIN (d_min, hypot (GMT_x_annotation[side][i] - x, GMT_y_annotation[side][i] - y)); if (d_min < GMT->current.setting.map_annot_min_spacing) return (true); /* OK to plot and add to list */ if (GMT_n_annotations[side] == GMT_alloc_annotations[side]) GMT_malloc2 (GMT, GMT_x_annotation[side], GMT_y_annotation[side], GMT_n_annotations[side], &(GMT_alloc_annotations[side]), double); GMT_x_annotation[side][GMT_n_annotations[side]] = x, GMT_y_annotation[side][GMT_n_annotations[side]] = y, GMT_n_annotations[side]++; return (false); } void gmt_map_symbol (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double *xx, double *yy, unsigned int *sides, double *line_angles, char *label, unsigned int nx, unsigned int type, bool annot, unsigned int level, unsigned int form) { /* type = 0 for lon and 1 for lat */ double line_angle, text_angle, div, tick_length, o_len, len, ca, sa; unsigned int i, annot_type, justify; bool flip; len = GMT_get_annot_offset (GMT, &flip, level); /* Get annotation offset, and flip justification if "inside" */ annot_type = 2 << type; /* 2 = NS, 4 = EW */ for (i = 0; i < nx; i++) { if (!(GMT->current.setting.map_annot_oblique & 1) && ((type == 0 && (sides[i] % 2)) || (type == 1 && !(sides[i] % 2)))) continue; if (GMT_prepare_label (GMT, line_angles[i], sides[i], xx[i], yy[i], type, &line_angle, &text_angle, &justify)) continue; sincosd (line_angle, &sa, &ca); tick_length = GMT->current.setting.map_tick_length[0]; o_len = len; if (GMT->current.setting.map_annot_oblique & annot_type) o_len = tick_length; if (GMT->current.setting.map_annot_oblique & 8) { div = ((sides[i] % 2) ? fabs (ca) : fabs (sa)); tick_length /= div; o_len /= div; } xx[i] += o_len * ca; yy[i] += o_len * sa; if ((GMT->current.setting.map_annot_oblique & annot_type) && GMT->current.setting.map_annot_offset[level] > 0.0) { if (sides[i] % 2) xx[i] += (sides[i] == 1) ? GMT->current.setting.map_annot_offset[level] : -GMT->current.setting.map_annot_offset[level]; else yy[i] += (sides[i] == 2) ? GMT->current.setting.map_annot_offset[level] : -GMT->current.setting.map_annot_offset[level]; } if (annot) { if (gmt_annot_too_crowded (GMT, xx[i], yy[i], sides[i])) continue; if (GMT->current.proj.three_D && GMT->current.proj.z_project.cos_az > 0) { /* Rotate annotation when seen "from North" */ if (!flip) justify = GMT_flip_justify (GMT, justify); text_angle += 180.0; } else if (flip) justify = GMT_flip_justify (GMT, justify); PSL_plottext (PSL, xx[i], yy[i], GMT->current.setting.font_annot[level].size, label, text_angle, justify, form); } } } void gmt_map_symbol_ew (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lat, char *label, double west, double east, bool annot, unsigned int level, unsigned int form) { unsigned int i, nc; struct GMT_XINGS *xings = NULL; nc = GMT_map_latcross (GMT, lat, west, east, &xings); for (i = 0; i < nc; i++) gmt_map_symbol (GMT, PSL, xings[i].xx, xings[i].yy, xings[i].sides, xings[i].angle, label, xings[i].nx, 1, annot, level, form); if (nc) GMT_free (GMT, xings); } void gmt_map_symbol_ns (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double lon, char *label, double south, double north, bool annot, unsigned int level, unsigned int form) { unsigned int i, nc; struct GMT_XINGS *xings = NULL; nc = GMT_map_loncross (GMT, lon, south, north, &xings); for (i = 0; i < nc; i++) gmt_map_symbol (GMT, PSL, xings[i].xx, xings[i].yy, xings[i].sides, xings[i].angle, label, xings[i].nx, 0, annot, level, form); if (nc) GMT_free (GMT, xings); } void gmt_z_gridlines (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double zmin, double zmax, int plane) { unsigned int k, i, nz, item[2] = {GMT_GRID_UPPER, GMT_GRID_LOWER}; double dz, zz, min, max, *z = NULL; char *plane_name[2] = {"y-z", "x-z"}; min = (plane == GMT_Y) ? GMT->current.proj.rect[XLO] : GMT->current.proj.rect[YLO]; max = (plane == GMT_Y) ? GMT->current.proj.rect[XHI] : GMT->current.proj.rect[YHI]; for (k = 0; k < 2; k++) { if (GMT->current.setting.map_grid_cross_size[k] > 0.0) continue; dz = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Z].item[item[k]]); if (!GMT->current.map.frame.axis[GMT_Z].item[item[k]].active || fabs(dz) == 0.0) continue; PSL_comment (PSL, "%s gridlines %s\n", plane_name[plane], k ? "(secondary)" : "(primary)"); GMT_setpen (GMT, &GMT->current.setting.map_grid_pen[k]); nz = GMT_coordinate_array (GMT, zmin, zmax, &GMT->current.map.frame.axis[GMT_Z].item[item[k]], &z, NULL); for (i = 0; i < nz; i++) { /* Here z acts as y and x|y acts as x */ /* Draw one horizontal line */ zz = GMT_z_to_zz (GMT, z[i]); PSL_plotsegment (PSL, min, zz, max, zz); } if (GMT->current.setting.map_grid_pen[k].style) PSL_setdash (PSL, NULL, 0); GMT_free (GMT, z); } } void gmt_map_gridlines (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { unsigned int k, np, item[2] = {GMT_GRID_UPPER, GMT_GRID_LOWER}; double dx, dy, *v = NULL; for (k = 0; k < 2; k++) { if (GMT->current.setting.map_grid_cross_size[k] > 0.0) continue; dx = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_X].item[item[k]]); dy = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Y].item[item[k]]); if (!(GMT->current.map.frame.axis[GMT_X].item[item[k]].active || GMT->current.map.frame.axis[GMT_Y].item[item[k]].active)) continue; PSL_comment (PSL, "%s\n", k ? "Map gridlines (secondary)" : "Map gridlines (primary)"); GMT_setpen (GMT, &GMT->current.setting.map_grid_pen[k]); if (GMT->current.map.frame.axis[GMT_X].special == GMT_CUSTOM && (np = gmt_load_custom_annot (GMT, &GMT->current.map.frame.axis[GMT_X], 'g', &v, NULL))) { gmt_x_grid (GMT, PSL, s, n, v, np); GMT_free (GMT, v); } else if (!GMT->current.map.frame.axis[GMT_X].item[item[k]].active || fabs(dx) == 0.0) { /* Nothing */ } else if (GMT->current.proj.xyz_projection[GMT_X] == GMT_TIME) gmt_timex_grid (GMT, PSL, w, e, s, n, item[k]); else if (GMT->current.proj.xyz_projection[GMT_X] == GMT_LOG10) gmt_logx_grid (GMT, PSL, w, e, s, n, dx); else if (GMT->current.proj.xyz_projection[GMT_X] == GMT_POW) gmt_powx_grid (GMT, PSL, w, e, s, n, dx); else if (GMT->current.map.frame.obl_grid) /* Draw oblique grid lines that go S to N */ GMT_linearx_oblgrid (GMT, PSL, w, e, s, n, dx); else /* Draw grid lines that go S to N */ GMT_linearx_grid (GMT, PSL, w, e, s, n, dx); if (GMT->current.map.frame.axis[GMT_Y].special == GMT_CUSTOM && (np = gmt_load_custom_annot (GMT, &GMT->current.map.frame.axis[GMT_Y], 'g', &v, NULL))) { gmt_y_grid (GMT, PSL, w, e, v, np); GMT_free (GMT, v); } else if (!GMT->current.map.frame.axis[GMT_Y].item[item[k]].active || fabs(dy) == 0.0) { /* Nothing */ } else if (GMT->current.proj.xyz_projection[GMT_Y] == GMT_TIME) gmt_timey_grid (GMT, PSL, w, e, s, n, item[k]); else if (GMT->current.proj.xyz_projection[GMT_Y] == GMT_LOG10) gmt_logy_grid (GMT, PSL, w, e, s, n, dy); else if (GMT->current.proj.xyz_projection[GMT_Y] == GMT_POW) gmt_powy_grid (GMT, PSL, w, e, s, n, dy); else if (GMT->current.map.frame.obl_grid) /* Draw oblique grid lines that go S to N */ GMT_lineary_oblgrid (GMT, PSL, w, e, s, n, dx); else /* Draw grid lines that go E to W */ gmt_lineary_grid (GMT, PSL, w, e, s, n, dy); if (GMT->current.setting.map_grid_pen[k].style) PSL_setdash (PSL, NULL, 0); } } void gmt_map_gridcross (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { unsigned int i, j, k, nx, ny, item[2] = {GMT_GRID_UPPER, GMT_GRID_LOWER}; double x0, y0, x1, y1, xa, xb, ya, yb, xi, yj, *x = NULL, *y = NULL; double x_angle, y_angle, Ca, Sa, L; for (k = i = 0; k < 2; k++) if (GMT->current.setting.map_grid_cross_size[k] > 0.0) i++; if (i == 0) return; /* No grid ticks requested */ GMT_map_clip_on (GMT, GMT->session.no_rgb, 3); for (k = 0; k < 2; k++) { if (GMT->current.setting.map_grid_cross_size[k] <= 0.0) continue; PSL_comment (PSL, "%s\n", k ? "Map gridcrosses (secondary)" : "Map gridcrosses (primary)"); GMT_setpen (GMT, &GMT->current.setting.map_grid_pen[k]); nx = GMT_coordinate_array (GMT, w, e, &GMT->current.map.frame.axis[GMT_X].item[item[k]], &x, NULL); ny = GMT_coordinate_array (GMT, s, n, &GMT->current.map.frame.axis[GMT_Y].item[item[k]], &y, NULL); L = 0.5 * GMT->current.setting.map_grid_cross_size[k]; for (j = 0; j < ny; j++) { for (i = 0; i < nx; i++) { if (!GMT_map_outside (GMT, x[i], y[j])) { /* Inside map */ yj = y[j]; if (GMT_POLE_IS_POINT(GMT) && doubleAlmostEqual (fabs (yj), 90.0)) { /* Only place one grid cross at the poles for maps where the poles are points */ xi = GMT->current.proj.central_meridian; i = nx; /* This ends the loop for this particular latitude */ } else xi = x[i]; GMT_geo_to_xy (GMT, xi, yj, &x0, &y0); if (GMT_is_geographic (GMT, GMT_IN)) { GMT_geo_to_xy (GMT, xi + GMT->current.map.dlon, yj, &x1, &y1); x_angle = d_atan2 (y1-y0, x1-x0); sincos (x_angle, &Sa, &Ca); xa = x0 - L * Ca; xb = x0 + L * Ca; ya = y0 - L * Sa; yb = y0 + L * Sa; } else { xa = x0 - L, xb = x0 + L; ya = yb = y0; } PSL_plotsegment (PSL, xa, ya, xb, yb); if (GMT_is_geographic (GMT, GMT_IN)) { GMT_geo_to_xy (GMT, xi, yj - copysign (GMT->current.map.dlat, yj), &x1, &y1); y_angle = d_atan2 (y1-y0, x1-x0); sincos (y_angle, &Sa, &Ca); xa = x0 - L * Ca; xb = x0 + L * Ca; ya = y0 - L * Sa; yb = y0 + L * Sa; } else { xa = xb = x0; ya = y0 - L, yb = y0 + L; } PSL_plotsegment (PSL, xa, ya, xb, yb); } } } if (nx) GMT_free (GMT, x); if (ny) GMT_free (GMT, y); if (GMT->current.setting.map_grid_pen[k].style) PSL_setdash (PSL, NULL, 0); } GMT_map_clip_off (GMT); } void gmt_map_tickitem (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n, unsigned int item) { unsigned int i, nx, ny; bool do_x, do_y; double dx, dy, *val = NULL, len; if (! (GMT->current.map.frame.axis[GMT_X].item[item].active || GMT->current.map.frame.axis[GMT_Y].item[item].active)) return; dx = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_X].item[item]); dy = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Y].item[item]); if (dx <= 0.0 && dy <= 0.0) return; do_x = dx > 0.0 && GMT->current.map.frame.axis[GMT_X].item[item].active && (item == GMT_ANNOT_UPPER || (item == GMT_TICK_UPPER && dx != GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_X].item[GMT_ANNOT_UPPER])) || (item == GMT_TICK_LOWER && dx != GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_X].item[GMT_ANNOT_LOWER]))); do_y = dy > 0.0 && GMT->current.map.frame.axis[GMT_Y].item[item].active && (item == GMT_ANNOT_UPPER || (item == GMT_TICK_UPPER && dy != GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Y].item[GMT_ANNOT_UPPER])) || (item == GMT_TICK_LOWER && dy != GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Y].item[GMT_ANNOT_LOWER]))); len = GMT->current.setting.map_tick_length[item]; if (GMT->current.setting.map_frame_type & GMT_IS_INSIDE) len = -fabs (len); /* Negative to become inside */ GMT->current.map.on_border_is_outside = true; /* Temporarily, points on the border are outside */ if (do_x) { /* Draw grid lines that go E to W */ if (GMT->current.map.frame.axis[GMT_X].file_custom) nx = GMT_coordinate_array (GMT, w, e, &GMT->current.map.frame.axis[GMT_X].item[item], &val, NULL); else nx = GMT_linear_array (GMT, w, e, dx, GMT->current.map.frame.axis[GMT_X].phase, &val); for (i = 0; i < nx; i++) gmt_map_lontick (GMT, PSL, val[i], s, n, len); if (nx) GMT_free (GMT, val); } if (do_y) { /* Draw grid lines that go S to N */ if (GMT->current.proj.z_down) { if (GMT->current.map.frame.axis[GMT_Y].file_custom) ny = GMT_coordinate_array (GMT, 0.0, n-s, &GMT->current.map.frame.axis[GMT_Y].item[item], &val, NULL); else ny = GMT_linear_array (GMT, 0.0, n-s, dy, GMT->current.map.frame.axis[GMT_Y].phase, &val); for (i = 0; i < ny; i++) val[i] = GMT->common.R.wesn[YHI] - val[i]; /* These are the radial values needed for positioning */ } else { if (GMT->current.map.frame.axis[GMT_Y].file_custom) ny = GMT_coordinate_array (GMT, s, n, &GMT->current.map.frame.axis[GMT_Y].item[item], &val, NULL); else ny = GMT_linear_array (GMT, s, n, dy, GMT->current.map.frame.axis[GMT_Y].phase, &val); } for (i = 0; i < ny; i++) gmt_map_lattick (GMT, PSL, val[i], w, e, len); if (ny) GMT_free (GMT, val); } GMT->current.map.on_border_is_outside = false; /* Reset back to default */ } void gmt_map_tickmarks (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { /* Tickmarks at annotation interval has already been done except when annotations were not desired */ if (!(GMT_is_geographic (GMT, GMT_IN) || GMT->current.proj.projection == GMT_POLAR)) return; /* Tickmarks already done by linear axis */ PSL_comment (PSL, "Map tickmarks\n"); GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); gmt_map_tickitem (GMT, PSL, w, e, s, n, GMT_ANNOT_UPPER); if (!(GMT->current.setting.map_frame_type & GMT_IS_FANCY)) { /* Draw plain boundary and return */ gmt_map_tickitem (GMT, PSL, w, e, s, n, GMT_TICK_UPPER); GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[1]); gmt_map_tickitem (GMT, PSL, w, e, s, n, GMT_TICK_LOWER); } PSL_setdash (PSL, NULL, 0); } bool gmt_set_do_seconds (struct GMT_CTRL *GMT, double inc) { /* Determines if seconds are to be labelled based on size of increment */ if (GMT->current.plot.calclock.geo.order[2] == -1) return (false); /* Seconds not requested by format */ if (GMT->current.plot.calclock.geo.n_sec_decimals > 0) return (true); /* If asked for ss.xxx annotations */ if (fabs (60.0 * fmod (fmod (inc, 1.0) * 60.0, 1.0)) >= 1.0) return (true); /* Multiples of >= 1 sec intervals */ return (false); } void gmt_label_trim (char *label, int stage) { /* Used to shorten secondary annotations by eliminating the leading digits. E.g. if the * primary annotation is 30 degrees and the secondary is 30:05, 30:10, etc then we remove * the leading 1 (degrees) or 2 (degrees and minutes) part of the annotation. * This can only work if we are annotating with the ddd:mm:sss[.xx] format as for ddd.xxxxx * we cannot do so. So if primary is 30:20 and secondary is 30:20:02, 30:20:04 etc we * end upremoving the leading 30:20 (stage = 2). */ size_t i; if (!label) return; /* No label given */ if (!stage) return; /* Not asked to do anything */ /* Must remove leading stuff (e.g., ddd) for 2ndary annotations */ for (i = 0; stage && label[i]; i++) if (!strchr ("0123456789-+", label[i])) stage--; while (label[i]) label[stage++] = label[i++]; /* Copy over the later part of the label to the beginning */ label[stage] = '\0'; i = strlen (label) - 1; if (strchr ("WESN", label[i])) label[i] = '\0'; /* Strip off the trailing W|E|S|N, if found */ } void gmt_map_annotate (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { unsigned int i, k, nx, ny, form, remove[2] = {0,0}, add; bool do_minutes, do_seconds, done_Greenwich, done_Dateline; bool full_lat_range, proj_A, proj_B, annot_0_and_360 = false, dual[2], is_dual, annot, is_world_save, lon_wrap_save; char label[GMT_LEN256] = {""}; char **label_c = NULL; double *val = NULL, dx[2], dy[2], w2, s2, del; if (!(GMT_x_is_lon (GMT, GMT_IN) || GMT_y_is_lat (GMT, GMT_IN) || GMT->current.proj.projection == GMT_POLAR)) return; /* Annotations and header already done by gmt_linear_map_boundary */ is_world_save = GMT->current.map.is_world; lon_wrap_save = GMT->current.map.lon_wrap; if (GMT->current.map.frame.header[0] && !GMT->current.map.frame.plotted_header) { /* Make plot header for geographic maps*/ if (GMT_is_geographic (GMT, GMT_IN) || GMT->current.map.frame.side[N_SIDE] == 2) { PSL_setfont (PSL, GMT->current.setting.font_annot[0].id); PSL_command (PSL, "/PSL_H_y %d ", psl_iz (PSL, GMT->current.setting.map_tick_length[0] + GMT->current.setting.map_annot_offset[0] + GMT->current.setting.map_title_offset)); PSL_deftextdim (PSL, "-h", GMT->current.setting.font_annot[0].size, "100\\312"); PSL_command (PSL, "add def\n"); } else PSL_defunits (PSL, "PSL_H_y", GMT->current.setting.map_title_offset + GMT->current.setting.map_tick_length[0]); PSL_command (PSL, "%d %d PSL_H_y add M\n", psl_iz (PSL, GMT->current.proj.rect[XHI] * 0.5), psl_iz (PSL, GMT->current.proj.rect[YHI])); form = GMT_setfont (GMT, &GMT->current.setting.font_title); PSL_plottext (PSL, 0.0, 0.0, -GMT->current.setting.font_title.size, GMT->current.map.frame.header, 0.0, PSL_BC, form); GMT->current.map.frame.plotted_header = true; } if (GMT->current.proj.edge[S_SIDE] || GMT->current.proj.edge[N_SIDE]) { dx[0] = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_X].item[GMT_ANNOT_UPPER]); dx[1] = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_X].item[GMT_ANNOT_LOWER]); /* Determine if we should annotate both 0 and 360 degrees */ full_lat_range = (fabs (180.0 - fabs (GMT->common.R.wesn[YHI] - GMT->common.R.wesn[YLO])) < GMT_SMALL); proj_A = (GMT->current.proj.projection == GMT_MERCATOR || GMT->current.proj.projection == GMT_OBLIQUE_MERC || GMT->current.proj.projection == GMT_WINKEL || GMT->current.proj.projection == GMT_ECKERT4 || GMT->current.proj.projection == GMT_ECKERT6 || GMT->current.proj.projection == GMT_ROBINSON || GMT->current.proj.projection == GMT_CYL_EQ || GMT->current.proj.projection == GMT_CYL_STEREO || GMT->current.proj.projection == GMT_CYL_EQDIST || GMT->current.proj.projection == GMT_MILLER || GMT->current.proj.projection == GMT_LINEAR); proj_B = (GMT->current.proj.projection == GMT_HAMMER || GMT->current.proj.projection == GMT_MOLLWEIDE || GMT->current.proj.projection == GMT_SINUSOIDAL); annot_0_and_360 = (is_world_save && (proj_A || (!full_lat_range && proj_B))); } else dx[0] = dx[1] = 0.0; if (GMT->current.proj.edge[E_SIDE] || GMT->current.proj.edge[W_SIDE]) { dy[0] = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Y].item[GMT_ANNOT_UPPER]); dy[1] = GMT_get_map_interval (GMT, &GMT->current.map.frame.axis[GMT_Y].item[GMT_ANNOT_LOWER]); } else dy[0] = dy[1] = 0.0; if (dx[0] <= 0.0 && dy[0] <= 0.0) return; dual[GMT_X] = (dx[1] > 0.0); dual[GMT_Y] = (dy[1] > 0.0); is_dual = (dual[GMT_X] | dual[GMT_Y]); PSL_comment (PSL, "Map annotations\n"); form = GMT_setfont (GMT, &GMT->current.setting.font_annot[0]); GMT->current.map.on_border_is_outside = true; /* Temporarily, points on the border are outside */ if (!GMT->common.R.oblique) { GMT->current.map.is_world = false; if (!(GMT->current.proj.projection == GMT_GENPER || GMT->current.proj.projection == GMT_GNOMONIC)) GMT->current.map.lon_wrap = false; } w2 = (dx[1] > 0.0) ? floor (w / dx[1]) * dx[1] : 0.0; s2 = (dy[1] > 0.0) ? floor (s / dy[1]) * dy[1] : 0.0; if (dual[GMT_X]) remove[GMT_X] = (dx[0] < (1.0/60.0)) ? 2 : 1; if (dual[GMT_Y]) remove[GMT_Y] = (dy[0] < (1.0/60.0)) ? 2 : 1; add = (is_dual) ? 1 : 0; for (k = 0; k < 1 + add; k++) { if (dx[k] > 0.0 && (GMT_x_is_lon (GMT, GMT_IN) || GMT->current.proj.projection == GMT_POLAR)) { /* Annotate the S and N boundaries */ done_Greenwich = done_Dateline = false; do_minutes = (fabs (fmod (dx[k], 1.0)) > GMT_SMALL); do_seconds = gmt_set_do_seconds (GMT, dx[k]); if (GMT->current.map.frame.axis[GMT_X].file_custom) nx = GMT_coordinate_array (GMT, w, e, &GMT->current.map.frame.axis[GMT_X].item[GMT_ANNOT_UPPER], &val, &label_c); else nx = GMT_linear_array (GMT, w, e, dx[k], GMT->current.map.frame.axis[GMT_X].phase, &val); for (i = 0; i < nx; i++) { /* Worry that we do not try to plot 0 and 360 OR -180 and +180 on top of each other */ if (GMT_IS_ZERO (val[i])) done_Greenwich = true; /* OK, want to plot 0 */ if (doubleAlmostEqual (val[i], -180.0)) done_Dateline = true; /* OK, want to plot -180 */ if (label_c && label_c[i] && label_c[i][0]) strncpy (label, label_c[i], GMT_LEN256); else GMT_get_annot_label (GMT, val[i], label, do_minutes, do_seconds, 0, is_world_save); /* Only annotate val[i] if * (1) projection is such that 0/360 or -180/180 are in different x/y locations, OR * (2) Plot 360 if 0 hasn't been plotted, OR * (3) plot +180 if -180 hasn't been plotted */ annot = annot_0_and_360 || !((done_Greenwich && doubleAlmostEqual (val[i], 360.0)) || (done_Dateline && doubleAlmostEqual (val[i], 180.0))); if (dual[GMT_X] && k == 0) { del = fmod (val[i] - w2, dx[1]); if (GMT_IS_ZERO (del) || doubleAlmostEqual (del, dx[1])) annot = false; else gmt_label_trim (label, remove[GMT_X]); } gmt_map_symbol_ns (GMT, PSL, val[i], label, s, n, annot, k, form); } if (nx) GMT_free (GMT, val); if (label_c) { for (i = 0; i < nx; i++) if (label_c[i]) free (label_c[i]); GMT_free (GMT, label_c); } } if (dy[k] > 0.0 && (GMT_y_is_lat (GMT, GMT_IN) || GMT->current.proj.projection == GMT_POLAR)) { /* Annotate W and E boundaries */ unsigned int lonlat; double *tval = NULL; if (GMT_y_is_lat (GMT, GMT_IN)) { do_minutes = (fabs (fmod (dy[k], 1.0)) > GMT_SMALL); do_seconds = gmt_set_do_seconds (GMT, dy[k]); lonlat = 1; } else { /* Also, we know that GMT->current.setting.format_geo_out = -1 in this case */ do_minutes = do_seconds = 0; lonlat = 2; } if (GMT->current.proj.z_down) { /* Want to annotate depth rather than radius */ if (GMT->current.map.frame.axis[GMT_Y].file_custom) ny = GMT_coordinate_array (GMT, 0.0, n-s, &GMT->current.map.frame.axis[GMT_Y].item[GMT_ANNOT_UPPER], &val, &label_c); else ny = GMT_linear_array (GMT, 0.0, n-s, dy[k], GMT->current.map.frame.axis[GMT_Y].phase, &tval); val = GMT_memory (GMT, NULL, ny, double); for (i = 0; i < ny; i++) val[i] = GMT->common.R.wesn[YHI] - tval[i]; /* These are the radial values needed for positioning */ } else { /* Annotate radius */ if (GMT->current.map.frame.axis[GMT_Y].file_custom) ny = GMT_coordinate_array (GMT, s, n, &GMT->current.map.frame.axis[GMT_Y].item[GMT_ANNOT_UPPER], &val, &label_c); else ny = GMT_linear_array (GMT, s, n, dy[k], GMT->current.map.frame.axis[GMT_Y].phase, &val); tval = val; /* Same thing */ } for (i = 0; i < ny; i++) { if ((GMT->current.proj.polar || GMT->current.proj.projection == GMT_VANGRINTEN) && doubleAlmostEqual (fabs (val[i]), 90.0)) continue; if (label_c && label_c[i] && label_c[i][0]) strncpy (label, label_c[i], GMT_LEN256); else GMT_get_annot_label (GMT, tval[i], label, do_minutes, do_seconds, lonlat, is_world_save); annot = true; if (dual[GMT_Y] && k == 0) { del = fmod (val[i] - s2, dy[1]); if (GMT_IS_ZERO (del) || doubleAlmostEqual (del, dy[1])) annot = false; else gmt_label_trim (label, remove[GMT_Y]); } gmt_map_symbol_ew (GMT, PSL, val[i], label, w, e, annot, k, form); } if (ny) GMT_free (GMT, val); if (label_c) { for (i = 0; i < ny; i++) if (label_c[i]) free (label_c[i]); GMT_free (GMT, label_c); } if (GMT->current.proj.z_down) GMT_free (GMT, tval); } } GMT->current.map.on_border_is_outside = false; /* Reset back to default */ GMT->current.map.is_world = is_world_save; GMT->current.map.lon_wrap = lon_wrap_save; } void gmt_map_boundary (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double w, double e, double s, double n) { if (!GMT->current.map.frame.draw && GMT->current.proj.projection != GMT_LINEAR) return; /* We have a separate check in linear_map_boundary */ PSL_comment (PSL, "Map boundaries\n"); switch (GMT->current.proj.projection) { case GMT_LINEAR: if (GMT_is_geographic (GMT, GMT_IN)) /* xy is lonlat */ gmt_fancy_map_boundary (GMT, PSL, w, e, s, n); else gmt_linear_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_POLAR: gmt_theta_r_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_MERCATOR: case GMT_CYL_EQ: case GMT_CYL_EQDIST: case GMT_CYL_STEREO: case GMT_MILLER: gmt_fancy_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_ALBERS: case GMT_ECONIC: case GMT_LAMBERT: case GMT_POLYCONIC: gmt_conic_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_OBLIQUE_MERC: gmt_oblmrc_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_GENPER: gmt_genper_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_STEREO: case GMT_ORTHO: case GMT_LAMB_AZ_EQ: case GMT_AZ_EQDIST: case GMT_GNOMONIC: if (GMT->current.proj.polar) gmt_polar_map_boundary (GMT, PSL, w, e, s, n); else gmt_circle_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_HAMMER: case GMT_MOLLWEIDE: case GMT_SINUSOIDAL: gmt_ellipse_map_boundary (GMT, PSL, w, e, s, n); break; case GMT_TM: case GMT_UTM: case GMT_CASSINI: case GMT_WINKEL: case GMT_ECKERT4: case GMT_ECKERT6: case GMT_ROBINSON: case GMT_VANGRINTEN: gmt_basic_map_boundary (GMT, PSL, w, e, s, n); break; } } /* GMT_map_basemap will create a basemap for the given area. * Scaling and wesn are assumed to be passed through the GMT->current.proj-structure (see GMT_project.h) * Tickmark info are passed through the GMT->current.map.frame-structure * */ bool gmt_is_fancy_boundary (struct GMT_CTRL *GMT) { switch (GMT->current.proj.projection) { case GMT_LINEAR: return (GMT_is_geographic (GMT, GMT_IN)); break; case GMT_MERCATOR: case GMT_CYL_EQ: case GMT_CYL_EQDIST: case GMT_CYL_STEREO: case GMT_MILLER: return (true); break; case GMT_ALBERS: case GMT_ECONIC: case GMT_LAMBERT: return (!GMT->common.R.oblique); break; case GMT_STEREO: case GMT_ORTHO: case GMT_GENPER: case GMT_LAMB_AZ_EQ: case GMT_AZ_EQDIST: case GMT_GNOMONIC: case GMT_VANGRINTEN: return (GMT->current.proj.polar); break; case GMT_POLAR: case GMT_OBLIQUE_MERC: case GMT_HAMMER: case GMT_MOLLWEIDE: case GMT_SINUSOIDAL: case GMT_TM: case GMT_UTM: case GMT_CASSINI: case GMT_WINKEL: case GMT_ECKERT4: case GMT_ECKERT6: case GMT_ROBINSON: return (false); break; default: GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Error in gmt_is_fancy_boundary - notify developers\n"); return (false); } } void GMT_map_basemap (struct GMT_CTRL *GMT) { unsigned int side; bool clip_on = false; double w, e, s, n; struct PSL_CTRL *PSL= GMT->PSL; if (!GMT->common.B.active[0] && !GMT->common.B.active[1]) return; PSL_setcolor (PSL, GMT->current.setting.map_frame_pen.rgb, PSL_IS_STROKE); w = GMT->common.R.wesn[XLO], e = GMT->common.R.wesn[XHI], s = GMT->common.R.wesn[YLO], n = GMT->common.R.wesn[YHI]; if (GMT->current.setting.map_annot_oblique & 2) GMT->current.map.frame.horizontal = 2; if (GMT->current.map.frame.horizontal == 2) GMT->current.setting.map_annot_oblique |= 2; if (GMT->current.setting.map_frame_type & GMT_IS_GRAPH && GMT_is_geographic (GMT, GMT_IN)) GMT->current.setting.map_frame_type = GMT_IS_PLAIN; if (GMT->current.setting.map_frame_type & GMT_IS_FANCY && !gmt_is_fancy_boundary(GMT)) GMT->current.setting.map_frame_type = GMT_IS_PLAIN; PSL_comment (PSL, "Start of basemap\n"); PSL_setdash (PSL, NULL, 0); /* To ensure no dashed pens are set prior */ GMT_vertical_axis (GMT, GMT->current.plot.mode_3D); if (GMT->current.proj.got_azimuths) uint_swap (GMT->current.map.frame.side[E_SIDE], GMT->current.map.frame.side[W_SIDE]); /* Temporary swap to trick justify machinery */ if (GMT->current.setting.map_frame_type & GMT_IS_INSIDE) { GMT_map_clip_on (GMT, GMT->session.no_rgb, 3); /* Must clip to ensure things are inside */ clip_on = true; } gmt_map_gridlines (GMT, PSL, w, e, s, n); gmt_map_gridcross (GMT, PSL, w, e, s, n); gmt_map_tickmarks (GMT, PSL, w, e, s, n); gmt_map_annotate (GMT, PSL, w, e, s, n); if (GMT->current.proj.got_azimuths) uint_swap (GMT->current.map.frame.side[E_SIDE], GMT->current.map.frame.side[W_SIDE]); /* Undo swap */ gmt_map_boundary (GMT, PSL, w, e, s, n); if (clip_on) GMT_map_clip_off (GMT); if (GMT->current.setting.map_frame_pen.style) PSL_setdash (PSL, NULL, 0); PSL_comment (PSL, "End of basemap\n"); for (side = 0; side < 4; side++) { if (GMT_n_annotations[side]) { GMT_free (GMT, GMT_x_annotation[side]); GMT_free (GMT, GMT_y_annotation[side]); GMT_n_annotations[side] = 0; } } PSL_setcolor (PSL, GMT->current.setting.map_default_pen.rgb, PSL_IS_STROKE); } void gmt_vertical_wall (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, int quadrant, double *nesw, bool back) { int plane = (quadrant + 1) % 2; GMT_plane_perspective (GMT, plane, nesw[quadrant % 4]); PSL_plotbox (PSL, nesw[(quadrant+1)%4], GMT->current.proj.zmin, nesw[(quadrant+3)%4], GMT->current.proj.zmax); if (back) gmt_z_gridlines (GMT, PSL, GMT->common.R.wesn[ZLO], GMT->common.R.wesn[ZHI], plane); } void GMT_vertical_axis (struct GMT_CTRL *GMT, unsigned int mode) { /* Mode means: 1 = background walls and title, 2 = foreground walls and axis, 3 = all */ unsigned int fore, back, old_plane, form; double nesw[4], old_level, xx, yy, az; struct PSL_CTRL *PSL= GMT->PSL; if (!GMT->current.proj.three_D || !GMT->current.map.frame.axis[GMT_Z].item[GMT_ANNOT_UPPER].active) return; nesw[0] = GMT->current.proj.rect[YHI], nesw[1] = GMT->current.proj.rect[XHI], nesw[2] = GMT->current.proj.rect[YLO], nesw[3] = GMT->current.proj.rect[XLO]; fore = mode & 2, back = mode & 1; /* Since this routine messes with the perspective, we save the state first, then restore later */ old_plane = GMT->current.proj.z_project.plane; old_level = GMT->current.proj.z_project.level; /* Vertical walls */ if (GMT->current.map.frame.draw_box) { PSL_setfill (PSL, GMT->session.no_rgb, true); if (fore) { gmt_vertical_wall (GMT, PSL, GMT->current.proj.z_project.quadrant + 3, nesw, false); gmt_vertical_wall (GMT, PSL, GMT->current.proj.z_project.quadrant , nesw, false); } if (back) { gmt_vertical_wall (GMT, PSL, GMT->current.proj.z_project.quadrant + 1, nesw, true); gmt_vertical_wall (GMT, PSL, GMT->current.proj.z_project.quadrant + 2, nesw, true); } } /* Vertical axis */ if (fore && GMT->current.map.frame.side[Z_SIDE]) { unsigned int k, n_z, quadrant, corner_to_quadrant[5] = {0, 2, 1, 4, 3}, z_axis[4]; /* Given corner ID 1-4, return quadrant, or vice versa (0 is unused) */ GMT_memcpy (z_axis, GMT->current.map.frame.z_axis, 4, unsigned int); for (k = n_z = 0; k < 4; k++) if (z_axis[k]) n_z++; /* Count # of vertical axes specified; if 0 then we do an auto-select */ if (n_z == 0) z_axis[corner_to_quadrant[GMT->current.proj.z_project.quadrant]-1] = 1; /* Set the default corner given the quadrant */ GMT_plane_perspective (GMT, -1, 0.0); for (k = 0; k < 4; k++) { if (z_axis[k] == 0) continue; /* Not drawing this vertical axis */ quadrant = corner_to_quadrant[k+1]; /* Given corner (k+1), return quadrant */ GMT_xyz_to_xy (GMT, nesw[(quadrant/2*2+1)%4], nesw[((quadrant+1)/2*2)%4], GMT->common.R.wesn[ZLO], &xx, &yy); /* Restrict reduced azimuth to -45 to 45 range */ az = GMT->current.proj.z_project.view_azimuth - 90.0 - floor ((GMT->current.proj.z_project.view_azimuth - 45.0) / 90.0) * 90.0; PSL_command (PSL, "/PSL_GPP matrix currentmatrix def [%g %g %g %g %g %g] concat\n", cosd(az), sind(az) * GMT->current.proj.z_project.sin_el, 0.0, GMT->current.proj.z_project.cos_el, xx * PSL->internal.x2ix, yy * PSL->internal.y2iy); GMT_xy_axis (GMT, 0.0, -GMT->common.R.wesn[ZLO], GMT->current.proj.zmax - GMT->current.proj.zmin, GMT->common.R.wesn[ZLO], GMT->common.R.wesn[ZHI], &GMT->current.map.frame.axis[GMT_Z], true, GMT->current.map.frame.side[Z_SIDE] & 2); PSL_command (PSL, "PSL_GPP setmatrix\n"); } } /* Title */ if (back && GMT->current.map.frame.header[0] && !GMT->current.map.frame.plotted_header) { /* No header today */ GMT_plane_perspective (GMT, -1, 0.0); form = GMT_setfont (GMT, &GMT->current.setting.font_title); PSL_plottext (PSL, 0.5 * (GMT->current.proj.z_project.xmin + GMT->current.proj.z_project.xmax), GMT->current.proj.z_project.ymax + GMT->current.setting.map_title_offset, GMT->current.setting.font_title.size, GMT->current.map.frame.header, 0.0, -2, form); GMT->current.map.frame.plotted_header = true; } GMT_plane_perspective (GMT, old_plane, old_level); } void GMT_map_clip_on (struct GMT_CTRL *GMT, double rgb[], unsigned int flag) { /* This function sets up a clip path so that only plotting * inside the map area will be drawn on paper. map_setup * must have been called first. If r >= 0, the map area will * first be painted in the r,g,b colors specified. flag can * be 0-3, as described in PSL_beginclipping(). */ uint64_t np; bool donut; double *work_x = NULL, *work_y = NULL; struct PSL_CTRL *PSL= GMT->PSL; np = GMT_map_clip_path (GMT, &work_x, &work_y, &donut); PSL_comment (PSL, "Activate Map clip path\n"); if (donut) { PSL_beginclipping (PSL, work_x, work_y, (int)np, rgb, 1); PSL_beginclipping (PSL, &work_x[np], &work_y[np], (int)np, rgb, 2); } else PSL_beginclipping (PSL, work_x, work_y, (int)np, rgb, flag); GMT_free (GMT, work_x); GMT_free (GMT, work_y); } void GMT_map_clip_off (struct GMT_CTRL *GMT) { /* Restores the original clipping path for the plot */ PSL_comment (GMT->PSL, "Deactivate Map clip path\n"); PSL_endclipping (GMT->PSL, 1); /* Reduce polygon clipping by one level */ } void GMT_setfill (struct GMT_CTRL *GMT, struct GMT_FILL *fill, int outline) { struct PSL_CTRL *PSL= GMT->PSL; if (!fill) /* NO fill pointer = no fill */ PSL_setfill (PSL, GMT->session.no_rgb, outline); else if (fill->use_pattern) { /* Fill with a pattern */ double rgb[4] = {-3.0, -3.0, -3.0, 0.0}; rgb[1] = (double)PSL_setpattern (PSL, fill->pattern_no, fill->pattern, fill->dpi, fill->f_rgb, fill->b_rgb); PSL_setfill (PSL, rgb, outline); } else /* Fill with a color */ PSL_setfill (PSL, fill->rgb, outline); } unsigned int GMT_setfont (struct GMT_CTRL *GMT, struct GMT_FONT *F) { /* Set all attributes of the selected font in the PS */ unsigned int outline; PSL_setfont (GMT->PSL, F->id); /* Set the current font ID */ if (F->form & 2) { /* Outline font requested; set pen and fill (rgb[0] == -1 means no fill) */ GMT_setpen (GMT, &F->pen); /* Stroke the text outline with this pen */ GMT_setfill (GMT, &F->fill, true); /* Use this color or pattern (if any) for the text fill */ outline = 1; /* Indicates outline font is needed and should be stroked */ } else if (F->form & 4) { /* Want to use a pattern to fill the text but do not draw outline */ GMT_setfill (GMT, &F->fill, false); outline = 2; /* Indicates outline font is needed for filling but will not be stroked */ } else { /* Regular, solid text fill is set via stroke color */ PSL_setcolor (GMT->PSL, F->fill.rgb, PSL_IS_FONT); outline = 0; /* Indicates we will fill text using "show" which takes current color (i.e., stroke color) */ } return (outline); } void gmt_timestamp (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double x, double y, unsigned int justify, char *U_label) { /* x, y = location of the time stamp box * justify indicates the corner of the box that (x,y) refers to, see below * U_label = label to be plotted to the right of the box * * 9 10 11 * |------------------| * 5 6 7 * |------------------| * 1 2 3 */ time_t right_now; char label[GMT_LEN256] = {""}, text[GMT_LEN256] = {""}; double dim[3] = {0.365, 0.15, 0.032}; /* Predefined dimensions in inches */ double unset_rgb[4] = {-1.0, -1.0, -1.0, 0.0}; /* Plot time string in format defined by format_time_stamp */ right_now = time ((time_t *)0); strftime (text, sizeof(text), GMT->current.setting.format_time_stamp, localtime (&right_now)); sprintf (label, " %s ", text); PSL_command (PSL, "%% Begin GMT time-stamp\nV\n"); PSL_setorigin (PSL, x, y, 0.0, PSL_FWD); PSL_setlinewidth (PSL, 0.25); PSL_setfont (PSL, GMT->current.setting.font_logo.id); PSL_defunits (PSL, "PSL_g_w", dim[0]); /* Size of the black [GMT] box */ PSL_defunits (PSL, "PSL_g_h", dim[1]); PSL_deftextdim (PSL, "PSL_b", 8.0, label); /* Size of the white [timestamp] box (use only length) */ /* When justification is not BL (justify == 1), add some PostScript code to move to the location where the lower left corner of the time stamp box is to be drawn */ switch ((justify + 3) % 4) { case 1: /* Center */ PSL_command (PSL, "PSL_g_w PSL_b_w add 2 div neg 0 T\n"); break; case 2: /* Right justify */ PSL_command (PSL, "PSL_g_w PSL_b_w add neg 0 T\n"); break; } switch (justify / 4) { case 1: /* Middle */ PSL_command (PSL, "0 PSL_g_h 2 div neg T\n"); break; case 2: /* Top justify */ PSL_command (PSL, "0 PSL_g_h neg T\n"); break; } /* Now draw black box with GMT logo, and white box with time stamp */ PSL_setfill (PSL, GMT->current.setting.map_default_pen.rgb, true); PSL_plotsymbol (PSL, 0.5*dim[0], 0.5*dim[1], dim, PSL_RECT); PSL_plotcolorimage (PSL, 0.0, 0.0, dim[0], dim[1], PSL_BL, GMT_glyph, 220, 90, 1); PSL_setfill (PSL, GMT->PSL->init.page_rgb, true); PSL_command (PSL, "PSL_g_h PSL_b_w PSL_g_w 0 Sb\n"); PSL_plottext (PSL, dim[0], dim[2], 8.0, label, 0.0, 1, 0); /* Optionally, add additional label to the right of the box */ if (U_label && U_label[0]) { sprintf (label, " %s", U_label); PSL_plottext (PSL, 0.0, 0.0, -7.0, label, 0.0, 1, 0); } PSL_command (PSL, "U\n%% End GMT time-stamp\n"); /* Reset fill style to empty and no outline and reset linewidth */ PSL_setfill (PSL, unset_rgb, false); PSL->current.linewidth = -1.0; } void gmt_echo_command (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_OPTION *options) { /* This routine will echo the command and its arguments to the * PostScript output file so that the user can see what scales * etc was used to produce this plot. For the -B and -U option * we will determine if the text stings have spaces and if so * add in the missing double quotes that the shell ate. */ size_t length = 0, i, k, in, start; char outstring[GMT_BUFSIZ] = {""}, tmpstring[GMT_BUFSIZ] = {""}; struct GMT_OPTION *opt = NULL; PSL_command (PSL, "\n%% PostScript produced by:\n%%%%GMT: %s", GMT->init.module_name); for (opt = options; opt; opt = opt->next) { if (length >= 512) { PSL_command (PSL, "%s \\\n%%%%GMT:+", outstring); length = 0; GMT_memset (outstring, GMT_BUFSIZ, char); } strcat (outstring, " "); length++; if (!(opt->option == GMT_OPT_INFILE || opt->option == GMT_OPT_OUTFILE)) { outstring[length++] = '-'; outstring[length++] = opt->option; } if (opt->option == 'B' && strchr (opt->arg, ' ')) { /* Restore double quotes for multi-word titles and labels */ for (i = in = k = 0; i < strlen (opt->arg); i++) { if (opt->arg[i] == ':') { if (in) tmpstring[k++] = '\"'; tmpstring[k++] = opt->arg[i]; if (!in) { if (opt->arg[i+1] == '.') tmpstring[k++] = '.', i++; /* The period indicating a title */ tmpstring[k++] = '\"'; } in = !in; } else tmpstring[k++] = opt->arg[i]; } tmpstring[k++] = '\0'; } else if (opt->option == 'U' && strchr (opt->arg, ' ')) { /* Restore double quotes for multi-word label */ GMT_memset (tmpstring, GMT_BUFSIZ, char); for (i = strlen (opt->arg), start = 0; start == 0 && i > 0; i--) if (opt->arg[i] == '/') start = i + 1; /* First start of label */ for (i = 0; i < start; i++) tmpstring[i] = opt->arg[i]; /* Any leading coordinates */ tmpstring[i] = '\"'; strcat (tmpstring, &opt->arg[i]); strcat (tmpstring, "\""); } else strcpy (tmpstring, opt->arg); strcat (outstring, tmpstring); length += strlen (tmpstring); } PSL_command (PSL, "%s\n", outstring); } void gmt_NaN_pen_up (double x[], double y[], unsigned int pen[], uint64_t n) { /* Ensure that if there are NaNs we set pen = PSL_MOVE */ uint64_t i, n1; for (i = 0, n1 = n - 1; i < n; i++) { if (GMT_is_dnan (x[i]) || GMT_is_dnan (y[i])) { pen[i] = PSL_MOVE; if (i < n1) pen[i+1] = PSL_MOVE; /* Since the next point must become the new anchor */ } } } void GMT_plot_line (struct GMT_CTRL *GMT, double *x, double *y, unsigned int *pen, uint64_t n) { uint64_t i, j, i1; int way; bool close, stop; double x_cross[2], y_cross[2]; struct PSL_CTRL *PSL= GMT->PSL; if (n < 2) return; gmt_NaN_pen_up (x, y, pen, n); /* Ensure we dont have NaNs in the coordinates */ i = 0; while (i < (n-1) && pen[i+1] == PSL_MOVE) i++; /* Skip repeating pen == PSL_MOVE in beginning */ if ((n-i) < 2) return; while (n > 1 && pen[n-1] == PSL_MOVE) n--; /* Cut off repeating pen == PSL_MOVE at end */ if ((n-i) < 2) return; for (j = i + 1; j < n && pen[j] == PSL_DRAW; j++); /* j == n means no PSL_MOVEs present */ close = (j == n) ? (hypot (x[n-1] - x[i], y[n-1] - y[i]) < GMT_SMALL) : false; /* First see if we can use the PSL_plotline call directly to save points */ for (j = i + 1, stop = false; !stop && j < n; j++) stop = (pen[j] == PSL_MOVE || (*GMT->current.map.jump) (GMT, x[j-1], y[j-1], x[j], y[j])); if (!stop) { PSL_plotline (PSL, &x[i], &y[i], (int)(n - i), PSL_MOVE + PSL_STROKE + close * PSL_CLOSE); return; } /* Here we must check for jumps, pen changes etc */ PSL_plotpoint (PSL, x[i], y[i], pen[i]); i++; while (i < n) { i1 = i - 1; if (pen[i] == pen[i1] && (way = (*GMT->current.map.jump) (GMT, x[i1], y[i1], x[i], y[i]))) { /* Jumped across the map */ (*GMT->current.map.get_crossings) (GMT, x_cross, y_cross, x[i1], y[i1], x[i], y[i]); if (way == -1) { /* Add left border point */ PSL_plotpoint (PSL, x_cross[0], y_cross[0], PSL_DRAW); /* Draw to left boundary... */ PSL_plotpoint (PSL, x_cross[1], y_cross[1], PSL_MOVE); /* ...then jump to the right boundary */ } else { PSL_plotpoint (PSL, x_cross[1], y_cross[1], PSL_DRAW); /* Draw to right boundary... */ PSL_plotpoint (PSL, x_cross[0], y_cross[0], PSL_MOVE); /* ...then jump to the left boundary */ } close = false; } PSL_plotpoint (PSL, x[i], y[i], pen[i]); i++; } PSL_command (PSL, close ? "P S\n" : "S\n"); } void GMT_draw_map_insert (struct GMT_CTRL *GMT, struct GMT_MAP_INSERT *B) { /* Place a rectangle on the map, as defined by center point and dimensions or w/e/s/n in geo or projected coordinates */ uint64_t n, k, np, nx, ny; size_t n_alloc = 0; double rect[4], dim[3], x0, y0; double *lon = NULL, *lat = NULL; struct GMT_DATASEGMENT *S = GMT_memory (GMT, NULL, 1, struct GMT_DATASEGMENT); /* First convert the information we have into the center and dimensions of a rectangle */ if (B->unit || B->oblique) { /* Dealing with projected coordinates and dimensions or got oblique box */ if (B->unit) GMT_init_distaz (GMT, B->unit, GMT_GREATCIRCLE, GMT_MAP_DIST); /* Get scales for this unit */ if (B->center) { /* Got a geographic center point for a rectangular box */ GMT_geo_to_xy (GMT, B->x0, B->y0, &x0, &y0); /* Get map location in inches */ GMT_memcpy (dim, B->dim, 2, double); /* Duplicate the width/height of rectangle */ for (k = 0; k < 2; k++) dim[k] /= GMT->current.map.dist[GMT_MAP_DIST].scale; /* Convert units to meters */ dim[GMT_X] = 0.5 * (dim[GMT_X] * GMT->current.proj.scale[GMT_X]); /* Turns meters into inches on map amd get half-dims */ dim[GMT_Y] = 0.5 * (dim[GMT_Y] * GMT->current.proj.scale[GMT_Y]); rect[XLO] = x0 - dim[GMT_X]; rect[XHI] = x0 + dim[GMT_X]; /* Get the min/max map coordinates of the rectangle */ rect[YLO] = y0 - dim[GMT_Y]; rect[YHI] = y0 + dim[GMT_Y]; } else if (B->oblique) { /* Got lower left and upper right coordinates of rectangular box */ GMT_geo_to_xy (GMT, B->wesn[XLO], B->wesn[YLO], &rect[XLO], &rect[YLO]); /* Lower left corner in inches */ GMT_geo_to_xy (GMT, B->wesn[XHI], B->wesn[YHI], &rect[XHI], &rect[YHI]); /* Lower left corner in inches */ } else { /* Got 4 sides in projected units or a rectangular box*/ GMT_memcpy (rect, B->wesn, 4, double); for (k = 0; k < 4; k++) rect[k] /= GMT->current.map.dist[GMT_MAP_DIST].scale; /* Turns units to meters */ /* Turns meters into inches on map */ rect[XLO] = rect[XLO] * GMT->current.proj.scale[GMT_X] + GMT->current.proj.origin[GMT_X]; rect[XHI] = rect[XHI] * GMT->current.proj.scale[GMT_X] + GMT->current.proj.origin[GMT_X]; rect[YLO] = rect[YLO] * GMT->current.proj.scale[GMT_Y] + GMT->current.proj.origin[GMT_Y]; rect[YHI] = rect[YHI] * GMT->current.proj.scale[GMT_Y] + GMT->current.proj.origin[GMT_Y]; } /* Now convert these to equidistant lon,lat array going counter-clockwise from lower-left point */ nx = lrint ((rect[XHI] - rect[XLO]) / GMT->current.setting.map_line_step) - 1; dim[GMT_X] = (rect[XHI] - rect[XLO]) / nx; ny = lrint ((rect[YHI] - rect[YLO]) / GMT->current.setting.map_line_step) - 1; dim[GMT_Y] = (rect[YHI] - rect[YLO]) / ny; np = 2 * (nx + ny) + 1; GMT_malloc2 (GMT, lon, lat, np, &n_alloc, double); n = 0; for (k = 0; k < nx; k++, n++) GMT_xy_to_geo (GMT, &lon[n], &lat[n], rect[XLO] + k * dim[GMT_X], rect[YLO]); /* South */ for (k = 0; k < ny; k++, n++) GMT_xy_to_geo (GMT, &lon[n], &lat[n], rect[XHI], rect[YLO] + k * dim[GMT_Y]); /* East */ for (k = 0; k < nx; k++, n++) GMT_xy_to_geo (GMT, &lon[n], &lat[n], rect[XHI] - k * dim[GMT_X], rect[YHI]); /* North */ for (k = 0; k < ny; k++, n++) GMT_xy_to_geo (GMT, &lon[n], &lat[n], rect[XLO], rect[YHI] - k * dim[GMT_Y]); /* West */ lon[n] = lon[0]; lat[n] = lat[0]; /* Close polygon */ } else /* Got geographic coordinates */ np = GMT_graticule_path (GMT, &lon, &lat, 1, B->wesn[XLO], B->wesn[XHI], B->wesn[YLO], B->wesn[YHI]); GMT_alloc_segment (GMT, S, 0, 2, true); /* Just get empty array pointers */ S->coord[GMT_X] = lon; S->coord[GMT_Y] = lat; S->n_rows = np; if (B->boxfill) GMT_setfill (GMT, &B->fill, B->boxdraw); if (B->boxdraw) GMT_setpen (GMT, &B->pen); GMT_geo_polygons (GMT, S); GMT_free_segment (GMT, &S, GMT_ALLOCATED_BY_GMT); } int GMT_draw_map_scale (struct GMT_CTRL *GMT, struct GMT_MAP_SCALE *ms) { unsigned int i, j, jj, form; unsigned int n_f_ticks[10] = {5, 4, 6, 4, 5, 6, 7, 4, 3, 5}; unsigned int n_a_ticks[10] = {1, 2, 3, 2, 1, 3, 1, 2, 1, 1}; enum GMT_enum_units unit; double dlon, x1, x2, y1, y2, a0, tx, ty, off, f_len, a_len, x_left, x_right, bar_length, x_label, y_label; double base, d_base, width, half, bar_width, dx, dx_f, dx_a; char txt[GMT_LEN256] = {""}, *this_label = NULL; char *label[GMT_N_UNITS] = {"m", "km", "miles", "nautical miles", "inch", "cm", "pt", "feet", "survey feet"}; char *units[GMT_N_UNITS] = {"m", "km", "mi", "nm", "in", "cm", "pt", "ft", "usft"}, measure; struct PSL_CTRL *PSL= GMT->PSL; if (!ms->plot) return GMT_OK; if (!GMT_is_geographic (GMT, GMT_IN)) return GMT_OK; /* Only for geographic projections */ measure = (ms->measure == 0) ? 'k' : ms->measure; /* Km is default */ if (GMT_compat_check (GMT, 4) && measure == 'm') { GMT_Report (GMT->parent, GMT_MSG_COMPAT, "Warning: Distance unit m is deprecated; use M for statute miles\n"); measure = 'M'; } if ((unit = GMT_get_unit_number (GMT, measure)) == GMT_IS_NOUNIT) { GMT_Report (GMT->parent, GMT_MSG_COMPAT, "Error: Bad distance unit %c\n", measure); GMT_exit (GMT, EXIT_FAILURE); return EXIT_FAILURE; } bar_length = 0.001 * GMT->current.proj.m_per_unit[unit] * ms->length; /* Now in km */ if (ms->gave_xy) /* Also get lon/lat coordinates */ GMT_xy_to_geo (GMT, &ms->lon, &ms->lat, ms->x0, ms->y0); else { /* Must convert lon/lat to location on map */ ms->lon = ms->x0; ms->lat = ms->y0; GMT_geo_to_xy (GMT, ms->lon, ms->lat, &ms->x0, &ms->y0); } if (GMT->current.proj.projection == GMT_OBLIQUE_MERC) { /* Set latitude to the oblique latitude */ a0 = fabs (GMT_great_circle_dist_degree (GMT, GMT->current.proj.o_pole_lon, GMT->current.proj.o_pole_lat, ms->scale_lon, ms->scale_lat)); /* Colatitude */ if (a0 > 90.0) a0 = 180.0 - 90.0; /* Flip hemisphere */ ms->scale_lat = 90.0 - a0; } /* Get longitudinal degree length corresponding to this km length at the latitude of scale */ dlon = 0.5 * bar_length / (GMT->current.proj.DIST_KM_PR_DEG * cosd (ms->scale_lat)); GMT_geo_to_xy (GMT, GMT->current.proj.central_meridian - dlon, ms->scale_lat, &x1, &y1); GMT_geo_to_xy (GMT, GMT->current.proj.central_meridian + dlon, ms->scale_lat, &x2, &y2); width = hypot (x2 - x1, y2 - y1); half = 0.5 * width; a_len = fabs (GMT->current.setting.map_scale_height); off = a_len + 0.75 * GMT->current.setting.map_annot_offset[0]; x_left = ms->x0 - half; x_right = ms->x0 + half; if (ms->fancy) { /* Fancy scale */ j = urint (floor (d_log10 (GMT, ms->length / 0.95))); base = pow (10.0, (double)j); i = urint (ms->length / base) - 1; d_base = ms->length / n_a_ticks[i]; dx_f = width / n_f_ticks[i]; dx_a = width / n_a_ticks[i]; bar_width = 0.5 * fabs (GMT->current.setting.map_scale_height); f_len = 0.75 * fabs (GMT->current.setting.map_scale_height); if (ms->boxdraw || ms->boxfill) { /* Draw a rectangle beneath the scale */ dx = fabs (0.5 * j * 0.4 * (GMT->current.setting.font_annot[0].size / PSL_POINTS_PER_INCH)); if (ms->boxdraw) GMT_setpen (GMT, &ms->pen); GMT_setfill (GMT, &ms->fill, ms->boxdraw); PSL_plotbox (PSL, x_left - 2.0 * GMT->current.setting.map_annot_offset[0] - dx, ms->y0 - 1.5 * a_len - GMT->current.setting.font_annot[0].size / PSL_POINTS_PER_INCH - ((ms->justify == 'b') ? fabs(GMT->current.setting.map_label_offset) + 0.85 * GMT->current.setting.font_label.size / PSL_POINTS_PER_INCH: 0.0), x_right + 2.0 * GMT->current.setting.map_annot_offset[0] + dx, ms->y0 + 1.5 * a_len + ((ms->justify == 't') ? fabs(GMT->current.setting.map_label_offset) + GMT->current.setting.font_annot[0].size / PSL_POINTS_PER_INCH : 0.0)); } GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); PSL_plotsegment (PSL, x_left, ms->y0 - f_len, x_left, ms->y0); for (j = 0; j < n_f_ticks[i]; j++) { PSL_setfill (PSL, (j%2) ? GMT->PSL->init.page_rgb : GMT->current.setting.map_default_pen.rgb, true); PSL_plotbox (PSL, x_left + j * dx_f, ms->y0, x_left + (j+1) * dx_f, ms->y0 - bar_width); PSL_plotsegment (PSL, x_left + (j+1) * dx_f, ms->y0 - f_len, x_left + (j+1) * dx_f, ms->y0); } ty = ms->y0 - off; form = GMT_setfont (GMT, &GMT->current.setting.font_annot[0]); for (j = 0; j <= n_a_ticks[i]; j++) { if (ms->unit) sprintf (txt, "%g %s", j * d_base, units[unit]); else sprintf (txt, "%g", j * d_base); tx = x_left + j * dx_a; PSL_plotsegment (PSL, tx, ms->y0 - a_len, tx, ms->y0); PSL_plottext (PSL, tx, ty, GMT->current.setting.font_annot[0].size, txt, 0.0, PSL_TC, form); } switch (ms->justify) { case 'l': /* Left */ x_label = x_left - f_len; y_label = ms->y0 - a_len; jj = PSL_BR; /* Left side annotation are right-justified, etc. */ break; case 'r': /* right */ x_label = x_right + f_len; y_label = ms->y0 - a_len; jj = PSL_BL; break; case 't': /* top */ x_label = ms->x0; y_label = ms->y0 + fabs(GMT->current.setting.map_label_offset); jj = PSL_BC; break; default: /* bottom */ x_label = ms->x0; y_label = ms->y0 - a_len - fabs(GMT->current.setting.map_label_offset) - 0.85 * GMT->current.setting.font_annot[0].size / PSL_POINTS_PER_INCH; jj = PSL_TC; break; } if (ms->do_label) { this_label = (ms->label[0]) ? ms->label : label[unit]; form = GMT_setfont (GMT, &GMT->current.setting.font_label); PSL_plottext (PSL, x_label, y_label, GMT->current.setting.font_label.size, this_label, 0.0, jj, form); } } else { /* Simple scale */ if (ms->boxdraw || ms->boxfill) { /* Draw a rectangle beneath the scale */ if (ms->boxdraw) GMT_setpen (GMT, &ms->pen); dx = fabs (0.5 * lrint (floor (d_log10 (GMT, ms->length))) * 0.4 * (GMT->current.setting.font_annot[0].size / PSL_POINTS_PER_INCH)); GMT_setfill (GMT, &ms->fill, ms->boxdraw); PSL_plotbox (PSL, x_left - 2.0 * GMT->current.setting.map_annot_offset[0] - dx, ms->y0 - 1.5 * a_len - GMT->current.setting.font_annot[0].size / PSL_POINTS_PER_INCH, x_right + 2.0 * GMT->current.setting.map_annot_offset[0] + dx, ms->y0 + 1.5 * a_len); } GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); PSL_plotsegment (PSL, x_left, ms->y0 - GMT->current.setting.map_scale_height, x_left, ms->y0); PSL_plotsegment (PSL, x_left, ms->y0, x_right, ms->y0); PSL_plotsegment (PSL, x_right, ms->y0, x_right, ms->y0 - GMT->current.setting.map_scale_height); sprintf (txt, "%g %s", ms->length, label[unit]); form = GMT_setfont (GMT, &GMT->current.setting.font_annot[0]); PSL_plottext (PSL, ms->x0, ms->y0 - off, GMT->current.setting.font_annot[0].size, txt, 0.0, 10, form); } return GMT_OK; } void gmt_Nstar (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double x0, double y0, double r) { /* Draw a fancy 5-pointed North star */ unsigned int a; double r2, x[4], y[4], dir, dir2, s, c; r2 = r * 0.3; for (a = 0; a <= 360; a += 72) { /* Azimuth of the 5 points on the star */ /* Solid half */ x[0] = x[3] = x0, y[0] = y[3] = y0; dir = 90.0 - (double)a; sincosd (dir, &s, &c); x[1] = x0 + r * c; y[1] = y0 + r * s; dir2 = dir - 36.0; sincosd (dir2, &s, &c); x[2] = x0 + r2 * c; y[2] = y0 + r2 * s; PSL_setfill (PSL, GMT->current.setting.map_default_pen.rgb, true); PSL_plotpolygon (PSL, x, y, 4); /* Hollow half */ x[0] = x[3] = x0, y[0] = y[3] = y0; sincosd (dir, &s, &c); x[1] = x0 + r * c; y[1] = y0 + r * s; dir2 = dir + 36.0; sincosd (dir2, &s, &c); x[2] = x0 + r2 * c; y[2] = y0 + r2 * s; PSL_setfill (PSL, GMT->PSL->init.page_rgb, true); PSL_plotpolygon (PSL, x, y, 4); } } #define M_VW 0.005 #define M_HL 0.075 #define M_HW 0.015 #define DIST_TO_2ND_POINT 1.0 #define F_VW 0.01 #define F_HL 0.15 #define F_HW 0.05 void gmt_draw_mag_rose (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_MAP_ROSE *mr) { /* Magnetic compass rose */ unsigned int i, k, level, just, ljust[4] = {10, 5, 2, 7}, n_tick, form; double ew_angle, angle, R[2], tlen[3], L, s, c, x[5], y[5], xp[5], yp[5], offset, t_angle, scale[2], base, *val = NULL, dim[PSL_MAX_DIMS]; char label[16]; struct GMT_FILL f; /* Initialize fill structure */ GMT_init_fill (GMT, &f, GMT->current.setting.color_patch[GMT_BGD][0], GMT->current.setting.color_patch[GMT_BGD][1], GMT->current.setting.color_patch[GMT_BGD][2]); ew_angle = GMT_azim_to_angle (GMT, mr->lon, mr->lat, DIST_TO_2ND_POINT, 90.0); /* Get angle of E-W direction at this location */ R[0] = 0.75 * 0.5 * mr->size; R[1] = 0.5 * mr->size; tlen[0] = GMT->current.setting.map_tick_length[GMT_TICK_UPPER]; tlen[1] = GMT->current.setting.map_tick_length[GMT_ANNOT_UPPER];; tlen[2] = 1.5 * GMT->current.setting.map_tick_length[GMT_ANNOT_UPPER]; scale[0] = 0.85; scale[1] = 1.0; GMT->current.plot.r_theta_annot = false; /* Just in case it was turned on in gmt_map.c */ for (level = 0; level < 2; level++) { /* Outer and inner angles */ if (level == 0 && mr->kind == 1) continue; /* Sorry, not magnetic directions */ offset = (level == 0) ? mr->declination : 0.0; GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); n_tick = GMT_linear_array (GMT, 0.0, 360.0, mr->g_int[level], 0.0, &val); for (i = 0; i < n_tick - 1; i++) { /* Increments of fine tickmarks (-1 to avoid repeating 360) */ angle = offset + val[i]; k = (GMT_IS_ZERO (fmod (val[i], mr->a_int[level]))) ? 2 : ((GMT_IS_ZERO (fmod (val[i], mr->f_int[level]))) ? 1 : 0); sincosd (ew_angle + angle, &s, &c); x[0] = mr->x0 + R[level] * c, y[0] = mr->y0 + R[level] * s; x[1] = mr->x0 + (R[level] - scale[level]*tlen[k]) * c, y[1] = mr->y0 + (R[level] - scale[level]*tlen[k]) * s; PSL_plotsegment (PSL, x[0], y[0], x[1], y[1]); } GMT_free (GMT, val); form = GMT_setfont (GMT, &GMT->current.setting.font_annot[level]); n_tick = GMT_linear_array (GMT, 0.0, 360.0, mr->a_int[level], 0.0, &val); for (i = 0; i < n_tick - 1; i++) { /* Increments of annotations (-1 to avoid repeating 360) */ angle = 90.0 - (offset + val[i]); /* Since val is azimuth */ sincosd (ew_angle + angle, &s, &c); x[0] = mr->x0 + (R[level] + GMT->current.setting.map_annot_offset[level]) * c, y[0] = mr->y0 + (R[level] + GMT->current.setting.map_annot_offset[level]) * s; if (GMT->current.setting.map_degree_symbol == gmt_none) sprintf (label, "%ld", lrint (val[i])); else sprintf (label, "%ld%c", lrint (val[i]), (int)GMT->current.setting.ps_encoding.code[GMT->current.setting.map_degree_symbol]); t_angle = fmod ((double)(-val[i] - offset) + 360.0, 360.0); /* Now in 0-360 range */ if (t_angle > 180.0) t_angle -= 180.0; /* Now in -180/180 range */ if (t_angle > 90.0 || t_angle < -90.0) t_angle -= copysign (180.0, t_angle); just = (y[0] <= mr->y0) ? 10 : 2; if (level == 1 && doubleAlmostEqual (val[i], 90.0)) t_angle = -90.0, just = 2; if (level == 1 && doubleAlmostEqual (val[i], 270.0)) t_angle = 90.0, just = 2; PSL_plottext (PSL, x[0], y[0], GMT->current.setting.font_annot[level].size, label, t_angle, just, form); } GMT_free (GMT, val); } /* Draw extra tick for the 4 main compass directions */ GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); base = R[1] + GMT->current.setting.map_annot_offset[1] + GMT->current.setting.font_annot[1].size / PSL_POINTS_PER_INCH; for (i = 0, k = 1; i < 360; i += 90, k++) { /* 90-degree increments of tickmarks */ angle = (double)i; sincosd (ew_angle + angle, &s, &c); x[0] = mr->x0 + R[1] * c, y[0] = mr->y0 + R[1] * s; x[1] = mr->x0 + (R[1] + tlen[0]) * c, y[1] = mr->y0 + (R[1] + tlen[0]) * s; PSL_plotsegment (PSL, x[0], y[0], x[1], y[1]); if (k == 4) k = 0; if (!mr->label[k][0]) continue; /* No label desired */ x[0] = mr->x0 + base * c, y[0] = mr->y0 + base * s; x[1] = mr->x0 + (base + 2.0 * tlen[2]) * c, y[1] = mr->y0 + (base + 2.0 * tlen[2]) * s; PSL_plotsegment (PSL, x[0], y[0], x[1], y[1]); if (k == 2 && mr->label[2][0] == '*') { x[0] = mr->x0 + (base + 2.0*tlen[2] + GMT->current.setting.map_title_offset + 0.025*mr->size) * c, y[0] = mr->y0 + (base + 2.0*tlen[2] + GMT->current.setting.map_title_offset + 0.025*mr->size) * s; gmt_Nstar (GMT, PSL, x[0], y[0], 0.1*mr->size); } else { x[0] = mr->x0 + (base + 2.0*tlen[2] + GMT->current.setting.map_title_offset) * c, y[0] = mr->y0 + (base + 2.0*tlen[2] + GMT->current.setting.map_title_offset) * s; form = GMT_setfont (GMT, &GMT->current.setting.font_title); PSL_plottext (PSL, x[0], y[0], GMT->current.setting.font_title.size, mr->label[k], ew_angle, ljust[k], form); GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); } } GMT_memset (dim, PSL_MAX_DIMS, double); if (mr->kind == 2) { /* Compass needle and label */ sincosd (ew_angle + (90.0 - mr->declination), &s, &c); L = R[0] - 2.0 * tlen[2]; x[0] = mr->x0 - L * c, y[0] = mr->y0 - L * s; x[1] = mr->x0 + L * c, y[1] = mr->y0 + L * s; dim[0] = x[1], dim[1] = y[1], dim[2] = M_VW * mr->size, dim[3] = M_HL * mr->size, dim[4] = M_HW * mr->size, dim[5] = GMT->current.setting.map_vector_shape, dim[6] = GMT_VEC_END | GMT_VEC_FILL; GMT_setfill (GMT, &f, true); PSL_plotsymbol (PSL, x[0], y[0], dim, PSL_VECTOR); t_angle = fmod (ew_angle + 90.0 - mr->declination + 360.0, 360.0); /* Now in 0-360 range */ if (fabs (t_angle) > 90.0) t_angle -= copysign (180.0, t_angle); sincosd (t_angle, &s, &c); x[0] = mr->x0 - 2.0 * M_VW * mr->size * s, y[0] = mr->y0 + 2.0 * M_VW * mr->size * c; if (!strcmp(mr->dlabel, "-")) GMT_get_annot_label (GMT, mr->declination, mr->dlabel, true, false, 0, GMT->current.map.is_world); form = GMT_setfont (GMT, &GMT->current.setting.font_label); PSL_plottext (PSL, x[0], y[0], GMT->current.setting.font_label.size, mr->dlabel, t_angle, 2, form); } else { /* Just geographic directions and a centered arrow */ L = mr->size - 4.0*tlen[2]; x[0] = x[1] = x[4] = 0.0, x[2] = -0.25 * mr->size, x[3] = -x[2]; y[0] = -0.5 * L, y[1] = -y[0], y[2] = y[3] = 0.0, y[4] = y[1] + GMT->current.setting.map_annot_offset[0]; GMT_rotate2D (GMT, x, y, 5, mr->x0, mr->y0, ew_angle, xp, yp); /* Coordinate transformation and placement of the 4 labels */ dim[0] = xp[1], dim[1] = yp[1]; dim[2] = F_VW * mr->size, dim[3] = F_HL * mr->size, dim[4] = F_HW * mr->size; dim[5] = GMT->current.setting.map_vector_shape, dim[6] = GMT_VEC_END | GMT_VEC_FILL; GMT_setfill (GMT, &f, true); PSL_plotsymbol (PSL, xp[0], yp[0], dim, PSL_VECTOR); s = 0.25 * mr->size; GMT_init_fill (GMT, &f, -1.0, -1.0, -1.0); GMT_setfill (GMT, &f, true); PSL_plotsymbol (PSL, mr->x0, mr->y0, &s, PSL_CIRCLE); PSL_plotsegment (PSL, xp[2], yp[2], xp[3], yp[3]); } } /* These are used to scale the plain arrow given rose size */ #define ROSE_LENGTH_SCL1 (0.5 * M_SQRT2) #define ROSE_LENGTH_SCL2 0.5 #define ROSE_WIDTH_SCL1 0.2 #define ROSE_WIDTH_SCL2 0.2 #define ROSE_WIDTH_SCL3 0.2 void gmt_draw_dir_rose (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_MAP_ROSE *mr) { unsigned int i, kind, form, just[4] = {10, 5, 2, 7}; int k; double angle, L[4], R[4], x[8], y[8], xp[8], yp[8], tx[3], ty[3], s, c, rot[4] = {0.0, 45.0, 22.5, -22.5}; struct GMT_FILL f; /* Initialize fill structure */ GMT_init_fill (GMT, &f, GMT->current.setting.color_patch[GMT_BGD][0], GMT->current.setting.color_patch[GMT_BGD][1], GMT->current.setting.color_patch[GMT_BGD][2]); angle = GMT_azim_to_angle (GMT, mr->lon, mr->lat, DIST_TO_2ND_POINT, 90.0); /* Get angle of E-W direction at this location */ GMT_setpen (GMT, &GMT->current.setting.map_tick_pen[0]); if (mr->type == 1) { /* Fancy scale */ mr->size *= 0.5; /* Got diameter, use radius for calculations */ L[0] = mr->size; L[1] = ROSE_LENGTH_SCL1 * mr->size; L[2] = L[3] = ROSE_LENGTH_SCL2 * mr->size; R[0] = ROSE_WIDTH_SCL1 * mr->size; R[1] = ROSE_WIDTH_SCL2 * mr->size; R[2] = R[3] = ROSE_WIDTH_SCL3 * mr->size; mr->kind--; /* Turn 1-3 into 0-2 */ if (mr->kind == 2) mr->kind = 3; /* Trick so that we can draw 8 rather than 4 points */ for (k = kind = mr->kind; k >= 0; k--, kind--) { /* Do 4 blades 90 degrees apart, aligned with main axes & relative to (0,0) */ x[0] = L[kind], x[1] = x[7] = 0.5 * M_SQRT2 * R[kind], x[2] = x[6] = 0.0; y[0] = y[4] = 0.0, y[1] = y[3] = 0.5 * M_SQRT2 * R[kind], y[2] = L[kind]; x[3] = x[5] = -x[1], x[4] = -x[0]; y[5] = y[7] = -y[1], y[6] = -y[2]; GMT_rotate2D (GMT, x, y, 8, mr->x0, mr->y0, rot[kind] + angle, xp, yp); /* Coordinate transformation and placement of the 4 labels */ PSL_setfill (PSL, GMT->PSL->init.page_rgb, true); PSL_plotpolygon (PSL, xp, yp, 8); /* Outline of 4-pointed star */ tx[0] = mr->x0, ty[0] = mr->y0; /* Fill positive halfs of the 4-pointed blades */ PSL_setfill (PSL, GMT->current.setting.map_default_pen.rgb, true); tx[1] = xp[0], ty[1] = yp[0], tx[2] = xp[7], ty[2] = yp[7]; PSL_plotpolygon (PSL, tx, ty, 3); /* East */ tx[1] = xp[1], ty[1] = yp[1], tx[2] = xp[2], ty[2] = yp[2]; PSL_plotpolygon (PSL, tx, ty, 3); /* North */ tx[1] = xp[3], ty[1] = yp[3], tx[2] = xp[4], ty[2] = yp[4]; PSL_plotpolygon (PSL, tx, ty, 3); /* West */ tx[1] = xp[5], ty[1] = yp[5], tx[2] = xp[6], ty[2] = yp[6]; PSL_plotpolygon (PSL, tx, ty, 3); /* South */ } sincosd (angle, &s, &c); x[0] = x[2] = 0.0, x[1] = L[0] + GMT->current.setting.map_title_offset; x[3] = -x[1]; y[1] = y[3] = 0.0, y[2] = L[0] + GMT->current.setting.map_title_offset; y[0] = -y[2]; GMT_rotate2D (GMT, x, y, 4, mr->x0, mr->y0, angle, xp, yp); /* Coordinate transformation and placement of the 4 labels */ form = GMT_setfont (GMT, &GMT->current.setting.font_title); for (i = 0; i < 4; i++) PSL_plottext (PSL, xp[i], yp[i], GMT->current.setting.font_title.size, mr->label[i], angle, just[i], form); } else { /* Plain North arrow w/circle */ sincosd (angle, &s, &c); GMT_memset (x, PSL_MAX_DIMS, double); x[0] = x[1] = x[4] = 0.0, x[2] = -0.25 * mr->size, x[3] = -x[2]; y[0] = -0.5 * mr->size, y[1] = -y[0], y[2] = y[3] = 0.0; y[4] = y[1] + GMT->current.setting.map_annot_offset[0]; GMT_rotate2D (GMT, x, y, 5, mr->x0, mr->y0, angle, xp, yp); /* Coordinate transformation and placement of the 4 labels */ x[0] = xp[1], x[1] = yp[1]; x[2] = F_VW * mr->size, x[3] = F_HL * mr->size, x[4] = F_HW * mr->size; x[5] = GMT->current.setting.map_vector_shape, x[6] = GMT_VEC_END | GMT_VEC_FILL; GMT_setfill (GMT, &f, true); PSL_plotsymbol (PSL, xp[0], yp[0], x, PSL_VECTOR); s = 0.25 * mr->size; GMT_init_fill (GMT, &f, -1.0, -1.0, -1.0); GMT_setfill (GMT, &f, true); PSL_plotsymbol (PSL, mr->x0, mr->y0, &s, PSL_CIRCLE); PSL_plotsegment (PSL, xp[2], yp[2], xp[3], yp[3]); form = GMT_setfont (GMT, &GMT->current.setting.font_title); PSL_plottext (PSL, xp[4], yp[4], GMT->current.setting.font_title.size, mr->label[2], angle, 2, form); } } void GMT_draw_map_rose (struct GMT_CTRL *GMT, struct GMT_MAP_ROSE *mr) { int tmp_join, tmp_limit; struct PSL_CTRL *PSL= GMT->PSL; if (!mr->plot) return; if (!GMT_is_geographic (GMT, GMT_IN)) return; /* Only for geographic projections */ if (mr->gave_xy) /* Also get lon/lat coordinates */ GMT_xy_to_geo (GMT, &mr->lon, &mr->lat, mr->x0, mr->y0); else { /* Must convert lon/lat to location on map */ mr->lon = mr->x0; mr->lat = mr->y0; GMT_geo_to_xy (GMT, mr->lon, mr->lat, &mr->x0, &mr->y0); } /* Temporarily use miter to get sharp points to compass rose */ tmp_join = PSL->internal.line_join; PSL_setlinejoin (PSL, 0); tmp_limit = PSL->internal.miter_limit; PSL_setmiterlimit (PSL, 0); if (mr->type == 2) /* Do magnetic compass rose */ gmt_draw_mag_rose (GMT, PSL, mr); else gmt_draw_dir_rose (GMT, PSL, mr); /* Switch line join style back */ PSL_setlinejoin (PSL, tmp_join); PSL_setmiterlimit (PSL, tmp_limit); } void GMT_setpen (struct GMT_CTRL *GMT, struct GMT_PEN *pen) { /* GMT_setpen issues PostScript code to set the specified pen. */ if (!pen) return; PSL_setlinewidth (GMT->PSL, pen->width); PSL_setdash (GMT->PSL, pen->style, pen->offset); PSL_setcolor (GMT->PSL, pen->rgb, PSL_IS_STROKE); } bool gmt_custum_failed_bool_test (struct GMT_CTRL *GMT, struct GMT_CUSTOM_SYMBOL_ITEM *s, double size[]) { bool result; /* Perform the boolean comparison and return false if test is true */ switch (s->operator) { case '<': /* < */ result = (size[s->var] < s->const_val[0]); break; case 'L': /* <= */ result = (size[s->var] <= s->const_val[0]); break; case '=': /* == */ result = (size[s->var] == s->const_val[0]); break; case 'G': /* >= */ result = (size[s->var] >= s->const_val[0]); break; case '>': /* > */ result = (size[s->var] > s->const_val[0]); break; case '%': /* % */ result = (!GMT_IS_ZERO (fmod (size[s->var], s->const_val[0]))); break; case 'I': /* [] inclusive range */ result = (size[s->var] >= s->const_val[0] && size[s->var] <= s->const_val[1]); break; case 'i': /* <> exclusive range */ result = (size[s->var] > s->const_val[0] && size[s->var] < s->const_val[1]); break; case 'l': /* [> in/ex-clusive range */ result = (size[s->var] >= s->const_val[0] && size[s->var] < s->const_val[1]); break; case 'r': /* <] ex/in-clusive range */ result = (size[s->var] > s->const_val[0] && size[s->var] <= s->const_val[1]); break; case 'E': /* var == NaN */ result = GMT_is_dnan (size[s->var]); break; default: GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Error: Unrecognized symbol macro operator (%d = '%c') passed to GMT_draw_custom_symbol\n", s->operator, (char)s->operator); GMT_exit (GMT, EXIT_FAILURE); return false; break; } if (s->negate) result = !result; /* Negate the test since we used a ! operator , e.g., != */ return (!result); /* Return the opposite of the test result */ } void gmt_flush_symbol_piece (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, double *x, double *y, uint64_t *n, struct GMT_PEN *p, struct GMT_FILL *f, unsigned int outline, bool *flush) { bool draw_outline; draw_outline = (outline && p->rgb[0] != -1) ? true : false; if (draw_outline) GMT_setpen (GMT, p); if (outline == 2) { /* Stroke path only */ PSL_plotline (PSL, x, y, (int)*n, PSL_MOVE + PSL_STROKE + PSL_CLOSE); } else { /* Fill polygon and possibly stroke outline */ GMT_setfill (GMT, f, draw_outline); PSL_plotpolygon (PSL, x, y, (int)*n); } *flush = false; *n = 0; } EXTERN_MSC void gmt_format_abstime_output (struct GMT_CTRL *GMT, double dt, char *text); void gmt_format_symbol_string (struct GMT_CTRL *GMT, struct GMT_CUSTOM_SYMBOL_ITEM *s, double size[], unsigned int *type, unsigned int start, char *text) { /* Returns the [possibly reformatted] string to use for the letter macro */ unsigned int n; if (s->action == GMT_SYMBOL_TEXT) /* Constant text */ strcpy (text, s->string); else if (s->string[0] == '$' && strlen (s->string) == 2 && isdigit (s->string[1]) && type[n=(s->string[1]-'1')] == GMT_IS_STRING) { /* Get entire string from input */ unsigned int want_col, col, pos; /* Tricky, how do we know which column in the input goes with this variable $n, i.e. how is n related to record col?. Then, we must scan the GMT->io.current.current_record for the col'th item and strcpy that into text. The reason n -> col is tricky is while we may now this is the 3rd extra variable, we dont know if -Ccurrent.io.current_record, " \t,", &pos, text); } else { /* Must replace special items within a template string */ unsigned int n_skip, in, out; char tmp[GMT_LEN64] = {""}; GMT_memset (text, GMT_LEN256, char); for (in = out = 0; s->string[in]; in++) { switch (s->string[in]) { case '%': /* Possibly a special %X, %Y request */ if (s->string[in+1] == 'X' || s->string[in+1] == 'Y') { /* Yes it was */ n = (s->string[in+1] == 'X') ? GMT_X : GMT_Y; GMT_ascii_format_col (GMT, tmp, GMT->current.io.curr_rec[n], GMT_IN, n); strcat (text, tmp); in++; /* Skip past the X or Y */ out += (unsigned int)strlen (tmp); } else /* Just a % sign */ text[out++] = s->string[in]; break; case '$': /* Possibly a variable $n */ if (isdigit (s->string[in+1])) { /* Yes it was */ n = (s->string[in+1] - '0'); n_skip = 1; if (s->string[in+2] == '+' && strchr ("TXY", s->string[in+3])) { /* Specific formatting requested */ if (s->string[in+3] == 'X') GMT_ascii_format_col (GMT, tmp, size[n], GMT_IN, GMT_X); else if (s->string[in+3] == 'Y') GMT_ascii_format_col (GMT, tmp, size[n], GMT_IN, GMT_Y); else if (s->string[in+3] == 'T') gmt_format_abstime_output (GMT, size[n], tmp); n_skip += 2; } else sprintf (tmp, GMT->current.setting.format_float_out, size[n]); strcat (text, tmp); in += n_skip; /* Skip past the $n[+X|Y|T] */ out += (unsigned int)strlen (tmp); } else /* Just pass regular text along */ text[out++] = s->string[in]; break; default: /* Just pass regular text along */ text[out++] = s->string[in]; break; } } } } int GMT_draw_custom_symbol (struct GMT_CTRL *GMT, double x0, double y0, double size[], struct GMT_CUSTOM_SYMBOL *symbol, struct GMT_PEN *pen, struct GMT_FILL *fill, unsigned int outline) { unsigned int na, i, level = 0, start, *type = NULL; bool flush = false, this_outline = false, found_elseif = false, skip[11]; uint64_t n = 0; size_t n_alloc = 0; double x, y, lon, lat, angle, *xx = NULL, *yy = NULL, *xp = NULL, *yp = NULL, dim[3]; char *c = NULL, user_text[GMT_LEN256] = {""}; struct GMT_CUSTOM_SYMBOL_ITEM *s = NULL; struct GMT_FILL *f = NULL, *current_fill = fill; struct GMT_PEN *p = NULL, *current_pen = pen; struct GMT_FONT font = GMT->current.setting.font_annot[0]; struct PSL_CTRL *PSL= GMT->PSL; #ifdef PS_MACRO /* PS_MACRO stuff is on hold, awaiting more testing */ if (symbol->PS) { /* Special PostScript-only symbol */ if (symbol->PS == 1) { /* First time we must dump the PS code definition */ PSL_comment (PSL, "Start of symbol %s\n", symbol->name); PSL_command (PSL, "%s", symbol->PS_macro); PSL_comment (PSL, "End of symbol %s\n", symbol->name); symbol->PS = 2; /* Flag to say we have dumped the PS code */ } PSL_command (PSL, "V "); PSL_setorigin (PSL, x0, y0, 0.0, PSL_FWD); for (i = symbol->n_required; i >= 0; i--) PSL_command (PSL, "%g ", size[i]); PSL_command (PSL, "Sk_%s U\n", symbol->name); return; } #endif /* Regular macro symbol */ /* We encapsulate symbol with gsave and translate origin to (x0, y0) first */ PSL_command (PSL, "V "); PSL_setorigin (PSL, x0, y0, 0.0, PSL_FWD); GMT_set_meminc (GMT, GMT_SMALL_CHUNK); type = symbol->type; /* Link to top level head info */ start = symbol->start; /* Link to top level head info */ s = symbol->first; while (s) { if (s->conditional > 1) { /* Process if/elseif/else and } by updating level and skip array, then go to next item */ if (s->conditional == 2) { /* Beginning of if branch. If we are inside an earlier branch whose test false then all is false */ skip[level+1] = (level > 0 && skip[level]) ? true : gmt_custum_failed_bool_test (GMT, s, size), level++; found_elseif = !skip[level]; } if (level == 10) { GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Error: Symbol macro (%s) logical nesting too deep [> 10]\n", symbol->name); GMT_exit (GMT, EXIT_FAILURE); return EXIT_FAILURE; } if (s->conditional == 4) level--, found_elseif = false; /* Simply reduce indent */ if (s->conditional == 6) { /* else branch */ skip[level] = (found_elseif) ? true : !skip[level]; /* Reverse test-result to apply to else branch */ found_elseif = false; } if (s->conditional == 8) { /* Skip if prior if/elseif was true, otherwise evaluate */ skip[level] = (skip[level]) ? gmt_custum_failed_bool_test (GMT, s, size) : true; if (!skip[level]) found_elseif = true; /* Needed since a final else branch will need to know if any of the if/elseifs kicked in */ } s = s->next; continue; } if (level && skip[level]) { /* We are inside an if-block but the block test was false, so we skip */ s = s->next; continue; } /* Finally, check for 1-line if tests */ if (s->conditional == 1 && gmt_custum_failed_bool_test (GMT, s, size)) { /* Done here, move to next item */ s = s->next; continue; } /* Scale coordinates and size parameters by the scale in size[0] */ x = s->x * size[0]; y = s->y * size[0]; dim[0] = s->p[0] * size[0]; dim[1] = s->p[1] * size[0]; dim[2] = s->p[2] * size[0]; switch (s->action) { case GMT_SYMBOL_MOVE: /* Flush existing polygon and start a new path */ if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); n = 0; if (n >= n_alloc) GMT_malloc2 (GMT, xx, yy, n, &n_alloc, double); xx[n] = x, yy[n] = y, n++; p = (s->pen) ? s->pen : current_pen; f = (s->fill) ? s->fill : current_fill; this_outline = (p && p->rgb[0] == -1) ? false : outline; break; case GMT_SYMBOL_STROKE: /* To force the drawing of a line (outline == 2), not a closed polygon */ if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, 2, &flush); n = 0; break; case GMT_SYMBOL_DRAW: /* Append another point to the path */ flush = true; if (n >= n_alloc) GMT_malloc2 (GMT, xx, yy, n, &n_alloc, double); xx[n] = x, yy[n] = y, n++; break; case GMT_SYMBOL_ARC: /* Append a circular arc to the path */ flush = true; na = GMT_get_arc (GMT, x, y, 0.5 * s->p[0] * size[0], s->p[1], s->p[2], &xp, &yp); for (i = 0; i < na; i++) { if (n >= n_alloc) GMT_malloc2 (GMT, xx, yy, n, &n_alloc, double); xx[n] = xp[i], yy[n] = yp[i], n++; } GMT_free (GMT, xp); GMT_free (GMT, yp); break; case GMT_SYMBOL_ROTATE: /* Rotate the symbol coordinate system by a fixed amount */ if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); PSL_setorigin (PSL, 0.0, 0.0, s->p[0], PSL_FWD); break; case GMT_SYMBOL_AZIMROTATE: /* Rotate the symbol y-axis to the a fixed azimuth */ if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); /* Need to recover actual lon,lat location of symbol first */ GMT_xy_to_geo (GMT, &lon, &lat, x0, y0); angle = GMT_azim_to_angle (GMT, lon, lat, 0.1, 90.0 - s->p[0]); PSL_setorigin (PSL, 0.0, 0.0, angle, PSL_FWD); break; case GMT_SYMBOL_VARROTATE: /* Rotate the symbol coordinate system by a variable amount */ if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); PSL_setorigin (PSL, 0.0, 0.0, size[s->var], PSL_FWD); break; case GMT_SYMBOL_TEXTURE: /* Change the current pen/fill settings */ if (s->fill) current_fill = s->fill; if (s->pen) current_pen = s->pen; break; case (int)'C': if (GMT_compat_check (GMT, 4)) { /* Warn and fall through */ GMT_Report (GMT->parent, GMT_MSG_COMPAT, "Warning: Circle macro symbol C is deprecated; use c instead\n"); s->action = GMT_SYMBOL_CIRCLE; /* Backwards compatibility, circles are now 'c' */ } else { GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Error: Unrecognized symbol code (%d = '%c') passed to GMT_draw_custom_symbol\n", s->action, (char)s->action); GMT_exit (GMT, EXIT_FAILURE); return EXIT_FAILURE; break; } case GMT_SYMBOL_CROSS: case GMT_SYMBOL_CIRCLE: case GMT_SYMBOL_SQUARE: case GMT_SYMBOL_TRIANGLE: case GMT_SYMBOL_DIAMOND: case GMT_SYMBOL_STAR: case GMT_SYMBOL_HEXAGON: case GMT_SYMBOL_OCTAGON: case GMT_SYMBOL_PENTAGON: case GMT_SYMBOL_INVTRIANGLE: case GMT_SYMBOL_RECT: case GMT_SYMBOL_XDASH: case GMT_SYMBOL_YDASH: if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); f = (s->fill) ? s->fill : current_fill; p = (s->pen) ? s->pen : current_pen; this_outline = (p && p->rgb[0] == -1) ? false : outline; if (this_outline) GMT_setpen (GMT, p); GMT_setfill (GMT, f, this_outline); PSL_plotsymbol (PSL, x, y, dim, s->action); break; case GMT_SYMBOL_ELLIPSE: case GMT_SYMBOL_ROTRECT: if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); f = (s->fill) ? s->fill : current_fill; p = (s->pen) ? s->pen : current_pen; this_outline = (p && p->rgb[0] == -1) ? false : outline; if (this_outline) GMT_setpen (GMT, p); GMT_setfill (GMT, f, this_outline); dim[0] = s->p[0]; PSL_plotsymbol (PSL, x, y, dim, PSL_ELLIPSE); break; case GMT_SYMBOL_MARC: if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); f = (s->fill) ? s->fill : current_fill; p = (s->pen) ? s->pen : current_pen; this_outline = (p && p->rgb[0] == -1) ? false : outline; if (this_outline) GMT_setpen (GMT, p); GMT_setfill (GMT, f, this_outline); dim[1] = s->p[1], dim[2] = s->p[2]; PSL_plotsymbol (PSL, x, y, dim, PSL_MARC); break; case GMT_SYMBOL_WEDGE: if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); f = (s->fill) ? s->fill : current_fill; p = (s->pen) ? s->pen : current_pen; this_outline = (p && p->rgb[0] == -1) ? false : outline; if (this_outline) GMT_setpen (GMT, p); GMT_setfill (GMT, f, this_outline); dim[1] = s->p[1], dim[2] = s->p[2]; PSL_plotsymbol (PSL, x, y, dim, PSL_WEDGE); break; case GMT_SYMBOL_TEXT: case GMT_SYMBOL_VARTEXT: if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); f = (s->fill) ? s->fill : current_fill; p = (s->pen) ? s->pen : current_pen; this_outline = (p && p->rgb[0] == -1) ? false : outline; if (this_outline) GMT_setpen (GMT, p); if ((c = strchr (s->string, '%')) && !(c[1] == 'X' || c[1] == 'Y') && GMT_compat_check (GMT, 4)) { /* Gave font name or number, too */ GMT_Report (GMT->parent, GMT_MSG_COMPAT, "Warning in macro l: [%] is deprecated syntax\n"); *c = 0; /* Replace % with the end of string NUL indicator */ c++; /* Go to next character */ if (GMT_getfont (GMT, c, &font)) GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Custom symbol subcommand l contains bad font (set to %s)\n", GMT_putfont (GMT, GMT->current.setting.font_annot[0])); (void) GMT_setfont (GMT, &font); } gmt_format_symbol_string (GMT, s, size, type, start, user_text); font.size = s->p[0] * size[0] * PSL_POINTS_PER_INCH; if (f && this_outline) GMT_setfill (GMT, f, this_outline); else if (f) PSL_setcolor (PSL, f->rgb, PSL_IS_FILL); else PSL_setfill (PSL, GMT->session.no_rgb, this_outline); PSL_plottext (PSL, x, y, font.size, user_text, 0.0, s->justify, this_outline); break; default: GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Error: Unrecognized symbol code (%d = '%c') passed to GMT_draw_custom_symbol\n", s->action, (char)s->action); GMT_exit (GMT, EXIT_FAILURE); return EXIT_FAILURE; break; } s = s->next; } if (flush) gmt_flush_symbol_piece (GMT, PSL, xx, yy, &n, p, f, this_outline, &flush); PSL_command (PSL, "U\n"); PSL_comment (PSL, "End of symbol %s\n", symbol->name); GMT_reset_meminc (GMT); if (xx) GMT_free (GMT, xx); if (yy) GMT_free (GMT, yy); return (GMT_OK); } /* Plotting functions related to contours */ void GMT_write_label_record (struct GMT_CTRL *GMT, FILE *fp, double x, double y, double angle, char *label, bool save_angle) { char word[GMT_LEN64] = {""}, record[GMT_BUFSIZ] = {""}; double geo[2]; record[0] = 0; /* Start with blank record */ GMT_xy_to_geo (GMT, &geo[GMT_X], &geo[GMT_Y], x, y); GMT_ascii_format_col (GMT, word, geo[GMT_X], GMT_OUT, GMT_X); strcat (record, word); strcat (record, GMT->current.setting.io_col_separator); GMT_ascii_format_col (GMT, word, geo[GMT_Y], GMT_OUT, GMT_Y); strcat (record, word); strcat (record, GMT->current.setting.io_col_separator); if (save_angle) { /* Also output the label angle */ GMT_ascii_format_col (GMT, word, angle, GMT_OUT, GMT_Z); strcat (record, word); strcat (record, GMT->current.setting.io_col_separator); } strcat (record, label); fprintf (fp, "%s\n", record); /* Write the data record */ return; } int GMT_contlabel_save_begin (struct GMT_CTRL *GMT, struct GMT_CONTOUR *G) { int error, kind; uint64_t k, seg; bool write_angle = (G->save_labels == 2); char record[GMT_BUFSIZ] = {""}; char *xname[2] = {"x", "lon"}, *yname[2] = {"y", "lat"}; double angle = 0.0; struct GMT_CONTOUR_LINE *L = NULL; /* Save the lon, lat, angle, text for each annotation to specified file*/ kind = GMT_is_geographic (GMT, GMT_IN); if (G->save_labels == 2) /* Write lon, lat, angle, label record */ sprintf (record, "# %s%s%s%sangle%slabel", xname[kind], GMT->current.setting.io_col_separator, yname[kind], GMT->current.setting.io_col_separator, GMT->current.setting.io_col_separator); else /* Write lon, lat, label record */ sprintf (record, "# %s%s%s%slabel", xname[kind], GMT->current.setting.io_col_separator, yname[kind], GMT->current.setting.io_col_separator); if ((G->fp = GMT_fopen (GMT, G->label_file, GMT->current.io.w_mode)) == NULL) { GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Error: Unable to create/open file %s\n", G->label_file); return (GMT_ERROR_ON_FOPEN); /* Establishes data ouput */ } fprintf (G->fp, "%s\n", record); /* Write hte header record */ for (seg = 0; seg < G->n_segments; seg++) { L = G->segment[seg]; /* Pointer to current segment */ if (!L->annot || L->n_labels == 0) continue; for (k = 0; k < L->n_labels; k++) { if (write_angle) angle = fmod (2.0 * (L->L[k].angle + 360.0), 360.0) / 2.0; /* Get text line in 0-180 range */ GMT_write_label_record (GMT, G->fp, L->L[k].x, L->L[k].y, angle, L->L[k].label, write_angle); /* write text record */ } } return (GMT_NOERROR); /* To finish and close the file, call GMT_contlabel_save_end */ } int GMT_contlabel_save_end (struct GMT_CTRL *GMT, struct GMT_CONTOUR *G) { GMT_fclose (GMT, G->fp); G->fp = NULL; return (GMT_NOERROR); } void gmt_contlabel_debug (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_CONTOUR *G) { uint64_t row; double size[1] = {0.025}; /* If called we simply draw the helper lines or points to assist in debug */ GMT_setpen (GMT, &GMT->current.setting.map_default_pen); if (G->fixed) { /* Place a small open circle at each fixed point */ PSL_setfill (PSL, GMT->session.no_rgb, PSL_OUTLINE); for (row = 0; row < (uint64_t)G->f_n; row++) PSL_plotsymbol (PSL, G->f_xy[0][row], G->f_xy[1][row], size, PSL_CIRCLE); } else if (G->crossing) { /* Draw a thin line */ uint64_t seg; unsigned int *pen = NULL; for (seg = 0; seg < G->xp->n_segments; seg++) { pen = GMT_memory (GMT, NULL, G->xp->segment[seg]->n_rows, unsigned int); for (row = 1, pen[0] = PSL_MOVE; row < G->xp->segment[seg]->n_rows; row++) pen[row] = PSL_DRAW; GMT_plot_line (GMT, G->xp->segment[seg]->coord[GMT_X], G->xp->segment[seg]->coord[GMT_Y], pen, G->xp->segment[seg]->n_rows); GMT_free (GMT, pen); } } } void gmt_contlabel_drawlines (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_CONTOUR *G, unsigned int mode) { uint64_t seg, k; unsigned int *pen = NULL; struct GMT_CONTOUR_LINE *L = NULL; for (seg = 0; seg < G->n_segments; seg++) { L = G->segment[seg]; /* Pointer to current segment */ if (L->annot && mode == 1) continue; /* Annotated lines done with curved text routine */ GMT_setpen (GMT, &L->pen); pen = GMT_memory (GMT, NULL, L->n, unsigned int); for (k = 1, pen[0] = PSL_MOVE; k < L->n; k++) pen[k] = PSL_DRAW; PSL_comment (PSL, "%s: %s\n", G->line_name, L->name); GMT_plot_line (GMT, L->x, L->y, pen, L->n); GMT_free (GMT, pen); } } void gmt_contlabel_plotlabels (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_CONTOUR *G, unsigned int mode) { /* mode = 1 when clipping is in effect */ int just, form, *node = NULL; uint64_t first_i, last_i, k, m, seg; double *angle = NULL, *xt = NULL, *yt = NULL; char **txt = NULL; struct GMT_CONTOUR_LINE *L = NULL; if (G->box & 8) { /* Repeat call for Transparent text box (already set by clip) */ form = 8; if (G->box & 1) form |= 256; /* Transparent box with outline */ if (G->box & 4) form |= 16; /* Rounded box with outline */ if (G->curved_text) PSL_plottextpath (PSL, NULL, NULL, 0, NULL, 0.0, NULL, 0, NULL, 0, NULL, form); else PSL_plottextclip (PSL, NULL, NULL, 0, 0.0, NULL, NULL, 0, NULL, form | 1); return; } if (G->number_placement && G->n_cont == 1) /* Special 1-label justification check */ just = G->end_just[(G->number_placement+1)/2]; /* Gives index 0 or 1 */ else just = G->just; for (seg = last_i = m = 0, first_i = UINTMAX_MAX; seg < G->n_segments; seg++) { /* Find first and last set of labels */ L = G->segment[seg]; /* Pointer to current segment */ if (L->n_labels) { /* This segment has labels */ if (first_i == UINTMAX_MAX) first_i = seg; /* OK, this is the first */ last_i = seg; /* When done, this will hold the last i */ m += L->n_labels; /* Total number of labels */ } } if (m == 0) return; /* There are no labels */ if (G->curved_text) { /* Curved labels in 2D with transparent or opaque textbox: use PSL_plottextpath */ for (seg = 0; seg < G->n_segments; seg++) { L = G->segment[seg]; /* Pointer to current segment */ if (!L->annot || L->n_labels == 0) continue; angle = GMT_memory (GMT, NULL, L->n_labels, double); txt = GMT_memory (GMT, NULL, L->n_labels, char *); node = GMT_memory (GMT, NULL, L->n_labels, int); for (k = 0; k < L->n_labels; k++) { angle[k] = L->L[k].angle; txt[k] = L->L[k].label; node[k] = (int)L->L[k].node; } form = mode; /* 1 means clip labelboxes, 0 means place text */ if (seg == first_i) form |= 32; /* First of possibly several calls to PSL_plottextpath */ if (seg == last_i) form |= 64; /* Final call to PSL_plottextpath */ if (!G->transparent) form |= 128; /* Want the box filled */ if (G->box & 1) form |= 256; /* Want box outline */ GMT_textpath_init (GMT, &L->pen, G->rgb, &G->pen, L->rgb); PSL_plottextpath (PSL, L->x, L->y, (int)L->n, node, G->font_label.size, txt, L->n_labels, angle, just, G->clearance, form); GMT_free (GMT, angle); GMT_free (GMT, node); GMT_free (GMT, txt); } } else { /* 2-D Straight transparent or opaque text labels: repeat call to PSL_plottextclip */ form = 1; if (G->box & 4) form |= 16; /* Want round box shape */ if (!G->transparent) form |= 128; /* Want the box filled */ if (G->box & 1) form |= 256; /* Want box outline */ if (mode == 0) { /* Opaque so PSL_plottextclip is called for 1st time here */ /* Allocate temp space for everything that must be passed to PSL_plottextclip */ GMT_malloc3 (GMT, angle, xt, yt, m, NULL, double); txt = GMT_memory (GMT, NULL, m, char *); for (seg = m = 0; seg < G->n_segments; seg++) { L = G->segment[seg]; /* Pointer to current segment */ for (k = 0; k < L->n_labels; k++, m++) { angle[m] = L->L[k].angle; txt[m] = L->L[k].label; xt[m] = L->L[k].x; yt[m] = L->L[k].y; } } /* Note this uses the last segments pen/fontrgb on behalf of all */ GMT_textpath_init (GMT, &L->pen, G->rgb, &G->pen, L->rgb); PSL_plottextclip (PSL, xt, yt, (int)m, G->font_label.size, txt, angle, just, G->clearance, form); /* This turns clipping ON */ GMT_free (GMT, angle); GMT_free (GMT, xt); GMT_free (GMT, yt); GMT_free (GMT, txt); } else { /* 2nd time called, just pass form with the 3rd bit set */ PSL_plottextclip (PSL, NULL, NULL, 0, 0.0, NULL, NULL, 0, NULL, form | 8); /* Now place the text using PSL variables already declared */ } } } void gmt_contlabel_clippath (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_CONTOUR *G, unsigned int mode) { uint64_t seg, k, m, nseg; int just, form; double *angle = NULL, *xt = NULL, *yt = NULL; char **txt = NULL; struct GMT_CONTOUR_LINE *L = NULL; if (mode == 0) { /* Turn OFF Clipping and bail */ PSL_comment (PSL, "Turn label clipping off:\n"); PSL_plottextclip (PSL, NULL, NULL, 0, 0.0, NULL, NULL, 0, NULL, 2); /* This turns clipping OFF if it was ON in the first place */ return; } for (seg = m = nseg = 0; seg < G->n_segments; seg++) { /* Get total number of segments with labels */ L = G->segment[seg]; /* Pointer to current segment */ if (L->n_labels) { nseg++; m += L->n_labels; } } if (m == 0) return; /* Nothing to do */ /* Turn ON clipping */ if (G->curved_text) { /* Do it via the labeling PSL function */ gmt_contlabel_plotlabels (GMT, PSL, G, 1); if (nseg == 1) G->box |= 8; /* Special message to just repeate the labelline call */ } else { /* Save PS memory by doing it this way instead via PSL_plottextclip */ if (G->number_placement && G->n_cont == 1) /* Special 1-label justification check */ just = G->end_just[(G->number_placement+1)/2]; /* Gives index 0 or 1 */ else just = G->just; /* Allocate temp space for everything that must be passed to PSL_plottextclip */ GMT_malloc3 (GMT, angle, xt, yt, m, NULL, double); txt = GMT_memory (GMT, NULL, m, char *); for (seg = m = 0; seg < G->n_segments; seg++) { L = G->segment[seg]; /* Pointer to current segment */ for (k = 0; k < L->n_labels; k++, m++) { angle[m] = L->L[k].angle; txt[m] = L->L[k].label; xt[m] = L->L[k].x; yt[m] = L->L[k].y; } } /* Note this uses the last segments pen/fontrgb on behalf of all */ GMT_textpath_init (GMT, &L->pen, G->rgb, &G->pen, L->rgb); form = (G->box & 4) ? 16 : 0; PSL_plottextclip (PSL, xt, yt, (int)m, G->font_label.size, txt, angle, just, G->clearance, form); /* This turns clipping ON */ G->box |= 8; /* Special message to just repeate the PSL call as variables have been defined */ GMT_free (GMT, angle); GMT_free (GMT, xt); GMT_free (GMT, yt); GMT_free (GMT, txt); } } void GMT_textpath_init (struct GMT_CTRL *GMT, struct GMT_PEN *LP, double Brgb[], struct GMT_PEN *BP, double Frgb[]) { PSL_defpen (GMT->PSL, "PSL_setlinepen", LP->width, LP->style, LP->offset, LP->rgb); PSL_defpen (GMT->PSL, "PSL_setboxpen", LP->width, LP->style, LP->offset, LP->rgb); PSL_defcolor (GMT->PSL, "PSL_setboxrgb", Brgb); PSL_defcolor (GMT->PSL, "PSL_settxtrgb", Frgb); } void GMT_contlabel_plot (struct GMT_CTRL *GMT, struct GMT_CONTOUR *G) { unsigned int i; bool no_labels; struct PSL_CTRL *PSL= GMT->PSL; if (!G->n_segments) return; /* Northing to do here */ if (G->debug) gmt_contlabel_debug (GMT, PSL, G); /* Debugging lines and points */ /* See if there are labels at all */ for (i = 0, no_labels = true; i < G->n_segments && no_labels; i++) if (G->segment[i]->n_labels) no_labels = false; if (no_labels) { /* No labels, just draw lines */ gmt_contlabel_drawlines (GMT, PSL, G, 0); return; } GMT_setfont (GMT, &G->font_label); if (G->transparent) { /* Transparent boxes */ gmt_contlabel_clippath (GMT, PSL, G, 1); /* Lays down clippath based on ALL labels */ gmt_contlabel_drawlines (GMT, PSL, G, 0); /* Safe to draw continuous lines everywhere - they will be clipped at labels */ if (G->delay) return; /* Leave clipping on and do not plot text yet - delayed until psclip -Cc|s */ gmt_contlabel_clippath (GMT, PSL, G, 0); /* Turn off label clipping */ gmt_contlabel_plotlabels (GMT, PSL, G, 0); /* Now plot labels where they go directly */ } else { /* Opaque text boxes */ gmt_contlabel_drawlines (GMT, PSL, G, 0); gmt_contlabel_plotlabels (GMT, PSL, G, 0); } } char *GMT_export2proj4 (struct GMT_CTRL *GMT) { char *pStrOut = NULL; char szProj4[512]; double scale_factor, false_easting = 0.0, false_northing = 0.0, a, b, f; scale_factor = GMT->current.setting.proj_scale_factor; szProj4[0] = 0; switch (GMT->current.proj.projection) { /* Cylindrical projections */ case GMT_UTM: sprintf (szProj4, "+proj=utm +zone=%d", (int)GMT->current.proj.pars[0]); if (GMT->current.proj.utm_hemisphere < 0) sprintf (szProj4, " +south"); break; case GMT_MERCATOR: sprintf (szProj4, "+proj=merc +lon_0=%.16g +k=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[0], scale_factor, false_easting, false_northing); break; case GMT_CYL_EQ: sprintf (szProj4, "+proj=cea +lon_0=%.16g +lat_ts=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_CYL_EQDIST: sprintf (szProj4, "+proj=eqc +lat_ts=%.16g +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], 0.0, GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_CYL_STEREO: break; case GMT_MILLER: sprintf (szProj4, "+proj=mill +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g +R_A", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_TM: sprintf (szProj4, "+proj=tmerc +lat_0=%.16g +lon_0=%.16g +k=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], scale_factor, false_easting, false_northing); break; case GMT_CASSINI: sprintf (szProj4, "+proj=cass +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_OBLIQUE_MERC: sprintf (szProj4, "+unavailable"); /*sprintf (szProj4, "+proj=omerc +lat_0=%.16g +lonc=%.16g +alpha=%.16g +k=%.16g +x_0=%.16g +y_0=%.16g", 0.0,0.0,0.0,0.0,0.0,0.0 );*/ break; case GMT_OBLIQUE_MERC_POLE: sprintf (szProj4, "+unavailable"); break; /* Conic projections */ case GMT_ALBERS: sprintf (szProj4, "+proj=aea +lat_1=%.16g +lat_2=%.16g +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[2], GMT->current.proj.pars[3], GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_ECONIC: sprintf (szProj4, "+proj=eqdc +lat_1=%.16g +lat_2=%.16g +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[2], GMT->current.proj.pars[3], GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_LAMBERT: sprintf (szProj4, "+proj=lcc +lat_1=%.16g +lat_2=%.16g +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[2], GMT->current.proj.pars[3], GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_POLYCONIC: sprintf (szProj4, "+proj=poly +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; /* Azimuthal projections */ case GMT_STEREO: sprintf (szProj4, "+proj=stere +lat_0=%.16g +lon_0=%.16g +k=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], scale_factor, false_easting, false_northing); break; case GMT_LAMB_AZ_EQ: sprintf (szProj4, "+proj=laea +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_ORTHO: sprintf (szProj4, "+unavailable"); break; case GMT_AZ_EQDIST: sprintf (szProj4, "+proj=aeqd +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_GNOMONIC: sprintf (szProj4, "+proj=gnom +lat_0=%.16g +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[1], GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_GENPER: sprintf (szProj4, "+unavailable"); break; case GMT_POLAR: sprintf (szProj4, "+unavailable"); break; /* Misc projections */ case GMT_MOLLWEIDE: sprintf (szProj4, "+proj=moll +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_HAMMER: sprintf (szProj4, "+unavailable"); break; case GMT_SINUSOIDAL: sprintf (szProj4, "+proj=sinu +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_VANGRINTEN: sprintf (szProj4, "+proj=vandg +lon_0=%.16g +x_0=%.16g +y_0=%.16g +R_A", GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_ROBINSON: sprintf (szProj4, "+proj=robin +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_ECKERT4: sprintf (szProj4, "+proj=eck4 +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_ECKERT6: sprintf (szProj4, "+proj=eck6 +lon_0=%.16g +x_0=%.16g +y_0=%.16g", GMT->current.proj.pars[0], false_easting, false_northing); break; case GMT_WINKEL: printf (szProj4, "+unavailable"); break; default: if (GMT_is_geographic (GMT, GMT_IN)) sprintf (szProj4, "+proj=latlong"); else sprintf (szProj4, "+xy"); /* Probably useless as a info, but put there something */ } a = GMT->current.setting.ref_ellipsoid[GMT->current.setting.proj_ellipsoid].eq_radius; f = GMT->current.setting.ref_ellipsoid[GMT->current.setting.proj_ellipsoid].flattening; b = a * (1 - f); sprintf (szProj4+strlen(szProj4), " +a=%.3f +b=%.6f", a, b); pStrOut = strdup(szProj4); return (pStrOut); } struct PSL_CTRL * GMT_plotinit (struct GMT_CTRL *GMT, struct GMT_OPTION *options) { /* Shuffles parameters and calls PSL_beginplot, issues PS comments regarding the GMT options * and places a time stamp, if selected */ int k, id, fno[PSL_MAX_EPS_FONTS], n_fonts, last; unsigned int this_proj; char title[GMT_BUFSIZ]; char *mode[2] = {"w","a"}; FILE *fp = NULL; /* Default which means stdout in PSL */ struct GMT_OPTION *Out = NULL; struct PSL_CTRL *PSL= NULL; PSL = GMT->PSL; /* Shorthand */ PSL->internal.verbose = GMT->current.setting.verbose; /* Inherit verbosity level from GMT */ if (GMT_compat_check (GMT, 4) && GMT->current.setting.ps_copies > 1) PSL->init.copies = GMT->current.setting.ps_copies; PSL_setdefaults (PSL, GMT->current.setting.ps_magnify, GMT->current.setting.ps_page_rgb, GMT->current.setting.ps_encoding.name); if ((Out = GMT_Find_Option (GMT->parent, '>', options))) { /* Want to use a specific output file */ k = (Out->arg[0] == '>') ? 1 : 0; /* Are we appending (k = 1) or starting a new file (k = 0) */ if (GMT->common.O.active && k == 0) { GMT_Report (GMT->parent, GMT_MSG_VERBOSE, "Warning: -O given but append-mode not selected for file %s\n", &(Out->arg[k])); } if ((fp = PSL_fopen (&(Out->arg[k]), mode[k])) == NULL) { /* Must open inside PSL DLL */ GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Cannot open %s with mode %s\n", &(Out->arg[k]), mode[k]); GMT_exit (GMT, EXIT_FAILURE); return NULL; } } /* Initialize the plot header and settings */ if (GMT->common.P.active) GMT->current.setting.ps_orientation = true; /* Default for overlay plots is no shifting */ if (!GMT->common.X.active && GMT->common.O.active) GMT->current.setting.map_origin[GMT_X] = 0.0; if (!GMT->common.Y.active && GMT->common.O.active) GMT->current.setting.map_origin[GMT_Y] = 0.0; /* Adjust offset when centering plot on center of page (PS does the rest) */ if (GMT->current.ps.origin[GMT_X] == 'c') GMT->current.setting.map_origin[GMT_X] -= 0.5 * GMT->current.map.width; if (GMT->current.ps.origin[GMT_Y] == 'c') GMT->current.setting.map_origin[GMT_Y] -= 0.5 * GMT->current.map.height; /* Get font names used */ id = 0; if (GMT->common.U.active) fno[id++] = GMT->current.setting.font_logo.id; /* Add GMT logo font */ /* Add title font if a title was used */ if (GMT->current.map.frame.header[0]) fno[id++] = GMT->current.setting.font_title.id; /* Add the label font if labels were used */ if (GMT->current.map.frame.axis[GMT_X].label[0] || GMT->current.map.frame.axis[GMT_Y].label[0] || GMT->current.map.frame.axis[GMT_Z].label[0]) fno[id++] = GMT->current.setting.font_label.id; /* Always add annotation fonts */ fno[id++] = GMT->current.setting.font_annot[0].id; fno[id++] = GMT->current.setting.font_annot[1].id; GMT_sort_array (GMT, fno, id, GMT_INT); last = -1; for (k = n_fonts = 0; k < id; k++) { if (fno[k] != last) last = fno[n_fonts++] = fno[k]; /* To avoid duplicates */ } for (k = n_fonts; k < PSL_MAX_EPS_FONTS; k++) fno[k] = -1; /* Terminate */ /* Get title */ sprintf (title, "GMT v%s Document from %s", GMT_VERSION, GMT->init.module_name); PSL_beginplot (PSL, fp, GMT->current.setting.ps_orientation, GMT->common.O.active, GMT->current.setting.ps_color_mode, GMT->current.ps.origin, GMT->current.setting.map_origin, GMT->current.setting.ps_page_size, title, fno); /* Issue the comments that allow us to trace down what command created this layer */ gmt_echo_command (GMT, PSL, options); /* Create %%PROJ tag that ps2raster can use to prepare a ESRI world file */ this_proj = GMT->current.proj.projection; for (k = 0, id = -1; id == -1 && k < GMT_N_PROJ4; k++) if (GMT->current.proj.proj4[k].id == this_proj) id = k; if (id >= 0) { /* Valid projection for creating world file info */ double Cartesian_m[4]; /* WESN equivalents in projected meters */ char *pstr = NULL, proj4name[16]; Cartesian_m[0] = (GMT->current.proj.rect[YLO] - GMT->current.proj.origin[GMT_Y]) * GMT->current.proj.i_scale[GMT_Y]; Cartesian_m[1] = (GMT->current.proj.rect[XHI] - GMT->current.proj.origin[GMT_X]) * GMT->current.proj.i_scale[GMT_X]; Cartesian_m[2] = (GMT->current.proj.rect[YHI] - GMT->current.proj.origin[GMT_Y]) * GMT->current.proj.i_scale[GMT_Y]; Cartesian_m[3] = (GMT->current.proj.rect[XLO] - GMT->current.proj.origin[GMT_X]) * GMT->current.proj.i_scale[GMT_X]; /* It woul be simpler if we had a cleaner way of telling when data is lon-lat */ if (GMT->current.proj.projection == GMT_LINEAR && GMT_is_geographic (GMT, GMT_IN)) strcpy (proj4name, "latlong"); else strncpy (proj4name, GMT->current.proj.proj4[id].name, 16U); pstr = GMT_export2proj4 (GMT); PSL_command (PSL, "%%%%PROJ: %s %.8f %.8f %.8f %.8f %.3f %.3f %.3f %.3f %s\n", proj4name, GMT->common.R.wesn[XLO], GMT->common.R.wesn[XHI], GMT->common.R.wesn[YLO], GMT->common.R.wesn[YHI], Cartesian_m[3], Cartesian_m[1], Cartesian_m[0], Cartesian_m[2], pstr); free (pstr); } if (!GMT->common.O.active) GMT->current.ps.layer = 0; /* New plot, reset layer counter */ PSL_beginlayer (GMT->PSL, ++GMT->current.ps.layer); /* Set layer transparency, if requested. Note that PSL_transp actually sets the opacity alpha, which is (1 - transparency) */ if (GMT->common.t.active) PSL_command (PSL, "%g /%s PSL_transp\n", 1.0 - 0.01 * GMT->common.t.value, GMT->current.setting.ps_transpmode); /* If requested, place the timestamp */ if (GMT->current.ps.map_logo_label[0] == 'c' && GMT->current.ps.map_logo_label[1] == 0) { char txt[4] = {' ', '-', 'X', 0}; struct GMT_OPTION *opt; /* -Uc was given as shorthand for "plot current command line" */ strncpy (GMT->current.ps.map_logo_label, GMT->init.module_name, GMT_BUFSIZ); for (opt = options; opt; opt = opt->next) { if (opt->option == GMT_OPT_INFILE || opt->option == GMT_OPT_OUTFILE) continue; /* Skip file names */ txt[2] = opt->option; strcat (GMT->current.ps.map_logo_label, txt); strcat (GMT->current.ps.map_logo_label, opt->arg); } } if (GMT->current.setting.map_logo) gmt_timestamp (GMT, PSL, GMT->current.setting.map_logo_pos[GMT_X], GMT->current.setting.map_logo_pos[GMT_Y], GMT->current.setting.map_logo_justify, GMT->current.ps.map_logo_label); PSL_settransparencymode (PSL, GMT->current.setting.ps_transpmode); /* Set PDF transparency mode, if used */ /* Enforce chosen line parameters */ k = GMT->PSL->internal.line_cap; GMT->PSL->internal.line_cap = -1; PSL_setlinecap (PSL, k); k = GMT->PSL->internal.line_join; GMT->PSL->internal.line_join = -1; PSL_setlinejoin (PSL, k); k = GMT->PSL->internal.miter_limit; GMT->PSL->internal.miter_limit = -1; PSL_setmiterlimit (PSL, k); return (PSL); } void GMT_plotcanvas (struct GMT_CTRL *GMT) { if (GMT->current.map.frame.paint) { /* Paint the inside of the map with specified fill */ double *x = NULL, *y = NULL; uint64_t np; bool donut; np = GMT_map_clip_path (GMT, &x, &y, &donut); GMT_setfill (GMT, &GMT->current.map.frame.fill, false); PSL_plotpolygon (GMT->PSL, x, y, (int)((1 + donut) * np)); GMT_free (GMT, x); GMT_free (GMT, y); } } void GMT_plotend (struct GMT_CTRL *GMT) { unsigned int i; struct PSL_CTRL *PSL= GMT->PSL; PSL_endlayer (GMT->PSL); if (GMT->common.t.active) PSL_command (PSL, "1 /Normal PSL_transp\n"); /* Reset transparency to fully opague, if required */ /* Check expected change of clip level to achieved one. Update overall clip level. Check for pending clips. */ if (GMT->current.ps.nclip != PSL->current.nclip) GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Module was expected to change clip level by %d, but clip level changed by %d\n", GMT->current.ps.nclip, PSL->current.nclip); if (abs (GMT->current.ps.nclip) == PSL_ALL_CLIP) /* Special case where we reset all polygon clip levels */ GMT->current.ps.clip_level = 0; else GMT->current.ps.clip_level += GMT->current.ps.nclip; if (!GMT->common.K.active) { if (GMT->current.ps.clip_level > 0) GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Warning: %d external clip operations were not terminated!\n", GMT->current.ps.clip_level); if (GMT->current.ps.clip_level < 0) GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Warning: %d extra terminations of external clip operations!\n", -GMT->current.ps.clip_level); GMT->current.ps.clip_level = 0; /* Reset to zero, so it will no longer show up in gmt.history */ } for (i = 0; i < 3; i++) if (GMT->current.map.frame.axis[i].file_custom) free (GMT->current.map.frame.axis[i].file_custom); PSL_endplot (PSL, !GMT->common.K.active); } void GMT_geo_line (struct GMT_CTRL *GMT, double *lon, double *lat, uint64_t n) { /* When geographic lines are plotted, they may cross the boundaries, may need to be clipped, * or may appear again on the other side of the map. This is all taken care of in this * routine. */ if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, n)) == 0) return; /* Nothing further to do */ GMT_plot_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.pen, GMT->current.plot.n); /* Separately plot the outline */ } void gmt_geo_polygon (struct GMT_CTRL *GMT, double *lon, double *lat, uint64_t n) { /* When geographic data are plotted, polygons that cross the west map boundary will * sometimes appear on the area bounded by the east map boundary - they "wrap around". * This usually means we have a global map with (east-west) = 360. * This function solves this by determining the polygon outline three times: * First time: Truncate polygon between left and right border * Second time: Find where the polygon jumps and set all the points between jumps to * the point on the west boundary at the same latitude. * Third time: Find where the polygon jumps and set all the points between jumps to * the point on the east boundary at the same latitude. * In reality it depends on the nature of the first jump in which order we do the * west and east truncation above. * If the polygon is clipped or wraps around at a periodic boundary then we must * be careful how we draw the outline (if selected). This function only lays down * the paths; filling/outline is controlled by higher powers (GMT_geo_polygons). */ #define JUMP_L 0 #define JUMP_R 1 int jump_dir = JUMP_L; bool jump; uint64_t k, first, i; double *xp = NULL, *yp = NULL; double (*x_on_border[2]) (struct GMT_CTRL *, double) = {NULL, NULL}; struct PSL_CTRL *PSL= GMT->PSL; if (GMT_eq (PSL->current.rgb[PSL_IS_FILL][0], -1.0)) { /* Just draw optional outline, no fill, nor pattern */ } else if (GMT_IS_AZIMUTHAL (GMT) || !GMT->current.map.is_world) { /* Because points way outside the map might get close to the antipode we must * clip the polygon first. The new radial clip handles this by excluding points * beyond the horizon and adding arcs along the boundary between exit points */ if ((GMT->current.plot.n = GMT_clip_to_map (GMT, lon, lat, n, &xp, &yp)) == 0) return; /* All points are outside region */ PSL_plotpolygon (PSL, xp, yp, (unsigned int)GMT->current.plot.n); /* Fill Cartesian polygon and possibly draw outline */ /* Free the memory we are done with */ GMT_free (GMT, xp); GMT_free (GMT, yp); } else { /* Here we come for all non-azimuthal projections */ if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, lon, lat, n)) == 0) return; /* Convert to (x,y,pen) - return if nothing to do */ if (!GMT_is_geographic (GMT, GMT_IN)) { /* Not geographic data so there are no periodic boundaries to worry about */ PSL_plotpolygon (PSL, GMT->current.plot.x, GMT->current.plot.y, (unsigned int)GMT->current.plot.n); return; } /* Check if there are any boundary jumps in the data as evidenced by pen up [PSL_MOVE] */ //for (first = 1, jump = false; first < n && !jump; first++) jump = (GMT->current.plot.pen[first] != PSL_DRAW); jump = (*GMT->current.map.will_it_wrap) (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.n, &first); /* Polygon does indeed wrap */ if (!jump) { /* We happened to avoid the periodic boundary - just paint and return */ PSL_plotpolygon (PSL, GMT->current.plot.x, GMT->current.plot.y, (unsigned int)GMT->current.plot.n); return; } /* Polygon wraps and we will plot it up to three times by truncating the part that would wrap the wrong way. * Here we cannot use the clipped/wrapped polygon to draw outline - that is done at the end, separately */ /* Temporary array to hold the modified x values */ xp = GMT_memory (GMT, NULL, GMT->current.plot.n, double); x_on_border[JUMP_R] = GMT_left_boundary; /* Pointers to functions that supply the x-coordinate of boundary for given y */ x_on_border[JUMP_L] = GMT_right_boundary; /* Do the main truncation of bulk of polygon */ for (i = 0, jump = false; i < GMT->current.plot.n; i++) { if (GMT->current.plot.pen[i] == PSL_MOVE && i) { jump = !jump; jump_dir = (GMT->current.plot.x[i] > GMT->current.map.half_width) ? JUMP_R : JUMP_L; } xp[i] = (jump) ? (*x_on_border[jump_dir]) (GMT, GMT->current.plot.y[i]) : GMT->current.plot.x[i]; } PSL_plotpolygon (PSL, xp, GMT->current.plot.y, (unsigned int)GMT->current.plot.n); /* Paint the truncated polygon */ /* Then do the Left truncation since some wrapped pieces might not have been plotted (k > 0 means we found a piece) */ jump_dir = (GMT->current.plot.x[first] > GMT->current.map.half_width) ? JUMP_L : JUMP_R; /* Opposite */ for (i = k = 0, jump = true; i < GMT->current.plot.n; i++) { if (GMT->current.plot.pen[i] == PSL_MOVE && i) { jump = !jump; jump_dir = (GMT->current.plot.x[i] > GMT->current.map.half_width) ? JUMP_R : JUMP_L; } xp[i] = (jump || jump_dir == JUMP_R) ? (*x_on_border[JUMP_R]) (GMT, GMT->current.plot.y[i]) : GMT->current.plot.x[i], k++; } if (k) PSL_plotpolygon (PSL, xp, GMT->current.plot.y, (unsigned int)GMT->current.plot.n); /* Paint the truncated polygon */ /* Then do the R truncation since some wrapped pieces might not have been plotted (k > 0 means we found a piece) */ jump_dir = (GMT->current.plot.x[first] > GMT->current.map.half_width) ? JUMP_R : JUMP_L; /* Opposite */ for (i = k = 0, jump = true; i < GMT->current.plot.n; i++) { if (GMT->current.plot.pen[i] == PSL_MOVE && i) { jump = !jump; jump_dir = (GMT->current.plot.x[i] > GMT->current.map.half_width) ? JUMP_R : JUMP_L; } xp[i] = (jump || jump_dir == JUMP_L) ? (*x_on_border[JUMP_L]) (GMT, GMT->current.plot.y[i]) : GMT->current.plot.x[i], k++; } if (k) PSL_plotpolygon (PSL, xp, GMT->current.plot.y, (unsigned int)GMT->current.plot.n); /* Paint the truncated polygon */ /* Free the memory we are done with */ GMT_free (GMT, xp); } } void gmt_geo_polygon_segment (struct GMT_CTRL *GMT, struct PSL_CTRL *PSL, struct GMT_DATASEGMENT *S, bool add_pole) { /* Handles the laying down of polygons suitable for filling only; outlines are done separately later. * Polar caps need special treatment in that we must add a detour to the pole. * That detour will not be drawn, only used for fill. */ uint64_t n = S->n_rows; double *plon = S->coord[GMT_X], *plat = S->coord[GMT_Y]; if (add_pole) { /* Must detour to the N or S pole, then resample the path */ n += 2; /* Add new first and last point to connect to the pole */ plon = GMT_memory (GMT, NULL, n, double); plat = GMT_memory (GMT, NULL, n, double); plat[0] = plat[n-1] = S->pole * 90.0; plon[0] = S->coord[GMT_X][0]; plon[n-1] = S->coord[GMT_X][S->n_rows-1]; GMT_memcpy (&plon[1], S->coord[GMT_X], S->n_rows, double); GMT_memcpy (&plat[1], S->coord[GMT_Y], S->n_rows, double); if (GMT->current.map.path_mode == GMT_RESAMPLE_PATH) n = GMT_fix_up_path (GMT, &plon, &plat, n, 0.0, 0); } gmt_geo_polygon (GMT, plon, plat, n); /* Plot filled polygon [no outline] */ if (add_pole) { /* Delete what we made */ GMT_free (GMT, plon); GMT_free (GMT, plat); } } void GMT_geo_polygons (struct GMT_CTRL *GMT, struct GMT_DATASEGMENT *S) { /* Deal with plotting of one or more polygons that may wrap across the map. * Multi-polygons occur if composed of a perimeter and one or more holes. * This is marked by S->next being set to point to the next hole. * Also, if the perimeter is a polar cap we must add a helping line that * connects to the pole but this line should not be drawn. This is why * we must lay down path twice (first for fill; then for line) since the * two paths are not the same. If no fill is requested then we just draw lines. */ struct GMT_DATASEGMENT *S2 = NULL; bool add_pole, separate; int outline = 0; char *type[2] = {"Perimeter", "Polar cap perimeter"}; char *use[2] = {"fill only", "fill and outline"}; struct PSL_CTRL *PSL= GMT->PSL; /* CASE 1: NO FILL REQUESTED -- JUST DRAW OUTLINE */ if (GMT_eq (PSL->current.rgb[PSL_IS_FILL][0], -1.0)) { PSL_comment (PSL, "Perimeter polygon for outline only\n"); GMT_geo_line (GMT, S->coord[GMT_X], S->coord[GMT_Y], S->n_rows); /* Draw the outline only */ for (S2 = S->next; S2; S2 = S2->next) { PSL_comment (PSL, "Hole polygon for outline only\n"); GMT_geo_line (GMT, S2->coord[GMT_X], S2->coord[GMT_Y], S2->n_rows); } return; /* Done with the simple task of drawing lines */ } /* CASE 2: FILL REQUESTED -- WITH OR WITHOUT OUTLINE */ add_pole = (abs (S->pole) == 1); /* true if a polar cap */ separate = ((add_pole || S->next) && PSL->current.outline); /* Multi-polygon (or polar cap) fill with outline handled by doing fill and outline separately */ if (separate) { /* Do fill and outline separately */ outline = PSL->current.outline; /* Keep a copy of what we wanted */ PSL->current.outline = false; /* Turns off outline for now (if set) */ PSL_command (PSL, "O0\n"); /* Temporarily switch off outline in the PS */ } /* Here we must lay down the perimeter and then the holes. */ PSL_comment (PSL, "Temporarily set FO to P for complex polygon building\n"); PSL_command (PSL, "/FO {P}!\n"); /* Temporarily replace FO so we can build a complex path of closed polygons using {P} */ PSL_comment (PSL, "%s polygon for %s\n", type[add_pole], use[PSL->current.outline]); gmt_geo_polygon_segment (GMT, PSL, S, add_pole); /* First lay down perimeter */ for (S2 = S->next; S2; S2 = S2->next) { /* Process all holes [none processed if there aren't any holes] */ PSL_comment (PSL, "Hole polygon for %s\n", use[PSL->current.outline]); gmt_geo_polygon_segment (GMT, PSL, S2, false); /* Add this hole to the path */ } PSL_comment (PSL, "Reset FO and fill the path\n"); PSL_command (PSL, "/FO {fs os}!\nFO\n"); /* Reset FO to its original settings, then force the fill */ if (separate) { /* Must draw outline separately */ PSL_command (PSL, "O1\n"); /* Switch on outline again */ PSL_comment (PSL, "%s polygon for outline only\n", type[add_pole]); PSL->current.outline = outline; /* Reset outline to what it was originally */ GMT_geo_line (GMT, S->coord[GMT_X], S->coord[GMT_Y], S->n_rows); for (S2 = S->next; S2; S2 = S2->next) { PSL_comment (PSL, "Hole polygon for outline only\n"); GMT_geo_line (GMT, S2->coord[GMT_X], S2->coord[GMT_Y], S2->n_rows); } } } void GMT_geo_ellipse (struct GMT_CTRL *GMT, double lon, double lat, double major, double minor, double azimuth) { /* GMT_geo_ellipse takes the location, axes (in km), and azimuth of an ellipse and draws an approximate ellipse using GMT_ELLIPSE_APPROX points and the chosen map projection */ int i; double delta_azimuth, sin_azimuth, cos_azimuth, sinp, cosp, x, y, x_prime, y_prime, rho, c; double sin_c, cos_c, center, *px = NULL, *py = NULL; struct GMT_DATASEGMENT *S = GMT_memory (GMT, NULL, 1, struct GMT_DATASEGMENT); GMT_alloc_segment (GMT, S, GMT_ELLIPSE_APPROX+1, 2, true); px = S->coord[GMT_X]; py = S->coord[GMT_Y]; delta_azimuth = 2.0 * M_PI / GMT_ELLIPSE_APPROX; major *= 500.0, minor *= 500.0; /* Convert to meters of semi-major and semi-minor axes */ sincosd (90.0 - azimuth, &sin_azimuth, &cos_azimuth); sincosd (lat, &sinp, &cosp); /* Set up azimuthal equidistant projection */ center = (GMT->current.proj.central_meridian < GMT->common.R.wesn[XLO] || GMT->current.proj.central_meridian > GMT->common.R.wesn[XHI]) ? 0.5 * (GMT->common.R.wesn[XLO] + GMT->common.R.wesn[XHI]) : GMT->current.proj.central_meridian; /* Approximate ellipse by a GMT_ELLIPSE_APPROX-sided polygon */ for (i = 0; i < GMT_ELLIPSE_APPROX; i++) { sincos (i * delta_azimuth, &y, &x); x *= major; y *= minor; /* Get rotated coordinates in m */ x_prime = x * cos_azimuth - y * sin_azimuth; y_prime = x * sin_azimuth + y * cos_azimuth; /* Convert m back to lon lat */ rho = hypot (x_prime, y_prime); c = rho / GMT->current.proj.EQ_RAD; sincos (c, &sin_c, &cos_c); py[i] = d_asind (cos_c * sinp + (y_prime * sin_c * cosp / rho)); if ((lat - 90.0) > -GMT_CONV_LIMIT) /* origin in Northern hemisphere */ px[i] = lon + d_atan2d (x_prime, -y_prime); else if ((lat + 90.0) < GMT_CONV_LIMIT) /* origin in Southern hemisphere */ px[i] = lon + d_atan2d (x_prime, y_prime); else px[i] = lon + d_atan2d (x_prime * sin_c, (rho * cosp * cos_c - y_prime * sinp * sin_c)); while ((px[i] - center) < -180.0) px[i] += 360.0; while ((px[i] - center) > +180.0) px[i] -= 360.0; } /* Explicitly close the polygon */ px[GMT_ELLIPSE_APPROX] = px[0], py[GMT_ELLIPSE_APPROX] = py[0]; GMT_geo_polygons (GMT, S); GMT_free_segment (GMT, &S, GMT_ALLOCATED_BY_GMT); } float gmt_inch_to_degree_scale (struct GMT_CTRL *GMT) { /* Determine the map scale at the center of the map and use that to scale items in inches to spherical degrees * anywhere on the map. We pick the center as the map distortion will be the least here. * This scaling is approximate only but needed to convert geovector head lengths to degrees. */ double clon, clat, tlon, tlat, x0, y0, x1, y1, length; float scale; length = 0.001 * (GMT->common.R.wesn[YHI] - GMT->common.R.wesn[YLO]); /* 0.1 percent of latitude extent is fairly small */ x0 = GMT->current.map.half_width; y0 = GMT->current.map.half_height; /* Middle map point in inches */ GMT_xy_to_geo (GMT, &clon, &clat, x0, y0); /* Geographic coordinates of middle map point */ GMT_get_point_from_r_az (GMT, clon, clat, length, 0.0, &tlon, &tlat); /* Arbitrary 2nd point north of (lon0,lat0) but near by */ GMT_geo_to_xy (GMT, tlon, tlat, &x1, &y1); /* Get map position in inches for close point */ scale = (float) (length / hypot (x1 - x0, y1 - y0)); /* This scales a length in inches to degrees, approximately */ return (scale); } uint64_t gmt_great_circle_arc (struct GMT_CTRL *GMT, double *A, double *B, double step, bool longway, struct GMT_SYMBOL *S, double **xp, double **yp) { /* Given vectors A and B, return great circle path sampled every step. Shorest path is selected unless longway is true */ /* Determine unit vector pole of great circle or use the one given by small circle pole and its opening rot */ uint64_t k, n; double P[3], X[3], R[3][3], R0[3][3], c, w, *xx = NULL, *yy = NULL; GMT_cross3v (GMT, A, B, P); /* Parallel to rotation pole */ GMT_normalize3v (GMT, P); /* Rotation pole unit vector */ c = d_acosd (GMT_dot3v (GMT, A, B)); /* opening angle in degrees */ if (longway) { /* Want to go the long way */ c = 360.0 - c; P[0] = -P[0], P[1] = -P[1], P[2] = -P[2]; } if (GMT_IS_ZERO (step)) step = GMT->current.map.path_step; /* Use default map-step if given as 0 */ n = lrint (ceil (c / step)) + 1; /* Number of segments needed for smooth curve from A to B inclusive */ step = D2R * c / (n - 1); /* Adjust step for exact fit, convert to radians */ GMT_malloc2 (GMT, xx, yy, n, NULL, double); /* Allocate space for arrays */ gmt_init_rot_matrix (R0, P); /* Get partial rotation matrix since no actual angle is applied yet */ for (k = 0; k < n; k++) { /* March along the arc */ w = k * step; /* Opening angle from A to this point X */ GMT_memcpy (R, R0, 9, double); /* Get a copy of the "0-angle" rotation matrix */ gmt_load_rot_matrix (w, R, P); /* Build the actual rotation matrix for this angle */ gmt_matrix_vect_mult (R, A, X); /* Rotate point A towards B and get X */ GMT_cart_to_geo (GMT, &yy[k], &xx[k], X, true); /* Get lon/lat of this point along arc */ } *xp = xx; *yp = yy; return (n); } uint64_t gmt_small_circle_arc (struct GMT_CTRL *GMT, double *A, double *B, double step, double P[], double rot, struct GMT_SYMBOL *S, double **xp, double **yp) { /* Given vectors A and B, return small circle path sampled every step. */ /* Use small circle pole and its opening rot */ uint64_t k, n; double X[3], R[3][3], R0[3][3], w, *xx = NULL, *yy = NULL; if (GMT_IS_ZERO (step)) step = GMT->current.map.path_step; /* Use default map-step if given as 0 */ n = lrint (ceil (fabs (rot) / step)) + 1; /* Number of segments needed for smooth curve from A to B inclusive */ step = D2R * rot / (n - 1); /* Adjust step for exact fit, convert to radians */ GMT_malloc2 (GMT, xx, yy, n, NULL, double); /* Allocate space for arrays */ gmt_init_rot_matrix (R0, P); /* Get partial rotation matrix since no actual angle is applied yet */ for (k = 0; k < n; k++) { /* March along the arc */ w = k * step; /* Opening angle from A to this point X */ GMT_memcpy (R, R0, 9, double); /* Get a copy of the "0-angle" rotation matrix */ gmt_load_rot_matrix (w, R, P); /* Build the actual rotation matrix for this angle */ gmt_matrix_vect_mult (R, A, X); /* Rotate point A towards B and get X */ GMT_cart_to_geo (GMT, &yy[k], &xx[k], X, true); /* Get lon/lat of this point along arc */ } *xp = xx; *yp = yy; return (n); } double gmt_get_local_scale (struct GMT_CTRL *GMT, double lon0, double lat0, double length, double azimuth) { /* Determine the local scale at lon0,lat in the direction azimuth using a test distance length in degrees. * The scale returned can be used to convert a map distance in inch to great circle degrees. * This is approximate only. */ double tlon, tlat, x0, y0, x1, y1; GMT_get_point_from_r_az (GMT, lon0, lat0, length, azimuth, &tlon, &tlat); /* Arbitrary 2nd point near (lon0,lat0) in the azimuth direction */ GMT_geo_to_xy (GMT, lon0, lat0, &x0, &y0); /* Get map position in inches for (lon0,lat0) */ GMT_geo_to_xy (GMT, tlon, tlat, &x1, &y1); /* Get map position in inches for close point */ return (length / hypot (x1 - x0, y1 - y0)); /* This scales a length in inches to degrees, approximately */ } void gmt_circle_pen_poly (struct GMT_CTRL *GMT, double *A, double *B, bool longway, double rot, struct GMT_PEN *pen, struct GMT_SYMBOL *S, struct GMT_CIRCLE *C, double scale) { /* Given vectors A and B, return a small circle polygon path sampled every step that approximates a pen of given width * drawn on the map. Use small circle pole and its opening rot */ uint64_t k, n, n2; double Ai[3], Ao[3], Px[3], X[3], R[3][3], R0[3][3], w, step; struct GMT_DATASEGMENT *L = GMT_memory (GMT, NULL, 1, struct GMT_DATASEGMENT); GMT_cross3v (GMT, A, C->P, Px); /* Px is Pole to plane through A and P */ GMT_normalize3v (GMT, Px); /* Rotation pole unit vector */ /* Rotate A back/fore by rotation angle of +/- pen halfwidth about Px */ w = 0.5 * scale * pen->width * GMT->session.u2u[GMT_PT][GMT_INCH] * S->v.scale; /* Half-width of pen in degrees */ GMT_make_rot_matrix2 (GMT, Px, +w, R); /* Rotation of rot_v degrees about pole P */ GMT_matrix_vect_mult (GMT, 3U, R, A, Ai); /* Get Ai = R * A */ GMT_make_rot_matrix2 (GMT, Px, -w, R); /* Rotation of rot_v degrees about pole P */ GMT_matrix_vect_mult (GMT, 3U, R, A, Ao); /* Get Ao = R * A */ if (longway) rot = 360.0 - rot; step = GMT->current.map.path_step; /* Use default map-step if given as 0 */ n = lrint (ceil (fabs (rot) / step)) + 1; /* Number of segments needed for smooth curve from A to B inclusive */ step = D2R * rot / (n - 1); /* Adjust step for exact fit, convert to radians */ GMT_alloc_segment (GMT, L, 2*n+1, 2, true); /* Allocate polygon to draw filled path */ n2 = 2*n-1; gmt_init_rot_matrix (R0, C->P); /* Get partial rotation matrix since no actual angle is applied yet */ for (k = 0; k < n; k++) { /* March along the arc */ w = k * step; /* Opening angle from A to this point X */ GMT_memcpy (R, R0, 9U, double); /* Get a copy of the "0-angle" rotation matrix */ gmt_load_rot_matrix (w, R, C->P); /* Build the actual rotation matrix for this angle */ gmt_matrix_vect_mult (R, Ai, X); /* Rotate point Ai towards B and get X */ GMT_cart_to_geo (GMT, &L->coord[GMT_Y][k], &L->coord[GMT_X][k], X, true); /* Get lon/lat of this point along arc */ gmt_matrix_vect_mult (R, Ao, X); /* Rotate point Ai towards B and get X */ GMT_cart_to_geo (GMT, &L->coord[GMT_Y][n2-k], &L->coord[GMT_X][n2-k], X, true); /* Get lon/lat of this point along arc */ } L->coord[GMT_X][2*n] = L->coord[GMT_X][0]; /* Explicitly close the polygon */ L->coord[GMT_Y][2*n] = L->coord[GMT_Y][0]; /* Plot pen as a closed filled polygon without outline */ PSL_command (GMT->PSL, "V\n"); GMT_setpen (GMT, pen); /* Set pen width just so later setpen's will work */ PSL_setfill (GMT->PSL, pen->rgb, 0); /* Fill, no outline */ GMT_geo_polygons (GMT, L); /* "Draw" the line */ PSL_command (GMT->PSL, "U\n"); GMT_free_segment (GMT, &L, GMT_ALLOCATED_BY_GMT); } void gmt_gcircle_sub (struct GMT_CTRL *GMT, double lon0, double lat0, double azimuth, double length, struct GMT_SYMBOL *S, struct GMT_CIRCLE *C) { /* We must determine points A and B, whose great-circle connector is the arc we seek to draw */ int justify = GMT_vec_justify (S->v.status); /* Return justification as 0-3 */ double x, y; GMT_memset (C, 1, struct GMT_CIRCLE); /* Set all to zero */ switch (justify) { /* A and B depends on chosen justification */ case 0: /* Was given coordinates of A; determine B */ C->lon[0] = lon0; C->lat[0] = lat0; GMT_geo_to_cart (GMT, C->lat[0], C->lon[0], C->A, true); C->r0 = C->r = length / GMT->current.proj.DIST_KM_PR_DEG; /* Arch length in spherical degrees */ if (C->r > 180.0) {C->longway = true; C->r -= 180.0;} /* Temporarily adjust if arcs > 180 degrees are chosen */ GMT_get_point_from_r_az (GMT, C->lon[0], C->lat[0], C->r, azimuth, &C->lon[1], &C->lat[1]); if (C->longway) C->lon[1] += 180.0, C->lat[1] = -C->lat[1]; /* Undo adjustment */ GMT_geo_to_cart (GMT, C->lat[1], C->lon[1], C->B, true); /* Get B */ break; case 1: /* Was given coordinates of halfway point; determine A and B */ C->r0 = C->r = length / GMT->current.proj.DIST_KM_PR_DEG; /* Arch length in spherical degrees */ if (C->r > 180.0) C->longway = true; /* Temporarily adjust if arcs > 180 degrees are chosen */ GMT_get_point_from_r_az (GMT, lon0, lat0, 0.5*C->r, azimuth, &C->lon[1], &C->lat[1]); GMT_geo_to_cart (GMT, C->lat[1], C->lon[1], C->B, true); /* Get B */ GMT_get_point_from_r_az (GMT, lon0, lat0, 0.5*C->r, azimuth+180.0, &x, &y); C->lon[0] = x; C->lat[0] = y; /* Replace the original A point */ GMT_geo_to_cart (GMT, C->lat[0], C->lon[0], C->A, true); /* Get A */ break; case 2: /* Was given coordinates of B point; determine A */ C->lon[0] = lon0; C->lat[0] = lat0; GMT_geo_to_cart (GMT, C->lat[0], C->lon[0], C->B, true); C->r0 = C->r = length / GMT->current.proj.DIST_KM_PR_DEG; /* Arch length in spherical degrees */ if (C->r > 180.0) {C->longway = true; C->r -= 180.0;} /* Temporarily adjust if arcs > 180 degrees are chosen */ GMT_get_point_from_r_az (GMT, C->lon[0], C->lat[0], C->r, azimuth+180.0, &C->lon[1], &C->lat[1]); if (C->longway) C->lon[1] += 180.0, C->lat[1] = -C->lat[1]; /* Undo adjustment */ GMT_geo_to_cart (GMT, C->lat[1], C->lon[1], C->A, true); /* Get A */ double_swap (C->lon[0], C->lon[1]); double_swap (C->lat[0], C->lat[1]); /* Now A is first and B is second */ break; case 3: /* Was given coordinates of B instead of azimuth and length; can never be longway */ C->lon[0] = lon0; C->lat[0] = lat0; C->lat[1] = length; C->lon[1] = azimuth; GMT_geo_to_cart (GMT, C->lat[0], C->lon[0], C->A, true); /* Get A */ GMT_geo_to_cart (GMT, C->lat[1], C->lon[1], C->B, true); /* Get B */ C->r0 = C->r = d_acosd (GMT_dot3v (GMT, C->A, C->B)); /* Arc length in degrees */ break; } GMT_cross3v (GMT, C->A, C->B, C->P); /* Rotation pole */ GMT_normalize3v (GMT, C->P); /* Rotation pole unit vector */ if (C->longway) { /* Want to go the long way */ C->P[0] = -C->P[0], C->P[1] = -C->P[1], C->P[2] = -C->P[2]; } } void gmt_scircle_sub (struct GMT_CTRL *GMT, double lon0, double lat0, double angle_1, double angle_2, struct GMT_SYMBOL *S, struct GMT_CIRCLE *C) { /* We must determine points A and B, whose small-circle connector about pole P is the arc we seek to draw */ int justify = GMT_vec_justify (S->v.status); /* Return justification as 0-3 */ double R[3][3], M[3]; GMT_memset (C, 1, struct GMT_CIRCLE); /* Set all to zero */ /* Requires the rotation matrix for pole S->v.pole */ /* Here angle_1, angle_2 are not necessarily that, depending on S->v.status: * S->v.pole & GMT_VEC_ANGLES : angle_1 is opening angle1 and angle_2 is opening angle2 about the pole. * Otherwise: angle_2 is the length of the arc in km */ GMT_geo_to_cart (GMT, lat0, lon0, M, true); /* Given input point */ GMT_geo_to_cart (GMT, S->v.pole[GMT_Y], S->v.pole[GMT_X], C->P, true); C->colat = d_acosd (GMT_dot3v (GMT, M, C->P)); /* Colatitude of input point relative to pole, in degrees */ if (S->v.status & GMT_VEC_ANGLES) { /* Was given the two opening angles; compute A and B accordingly */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], angle_1, R); GMT_matrix_vect_mult (GMT, 3U, R, M, C->A); /* Get A */ GMT_cart_to_geo (GMT, &C->lat[0], &C->lon[0], C->A, true); GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], angle_2, R); GMT_matrix_vect_mult (GMT, 3U, R, M, C->B); /* Get B */ GMT_cart_to_geo (GMT, &C->lat[1], &C->lon[1], C->B, true); C->rot = C->r0 = C->r = angle_2 - angle_1; } else { /* Here A, B, or midpoint was given, + the arc length via angle_2 */ /* Determine co-latitude for this point */ C->rot = C->r0 = C->r = (angle_1 / GMT->current.proj.DIST_KM_PR_DEG) / sind (C->colat); /* Opening angle in spherical degrees */ switch (justify) { /* A and B depends on chosen justification */ case 0: /* Was given coordinates of A; determine B */ GMT_memcpy (C->A, M, 3, double); C->lon[0] = lon0; C->lat[0] = lat0; if (C->r > 180.0) {C->longway = true; C->r -= 180.0;} /* Temporarily adjust if arcs > 180 degrees are chosen */ /* Rotate A by C->r0 degrees about P to get B */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], C->r0, R); GMT_matrix_vect_mult (GMT, 3U, R, C->A, C->B); /* Get B */ GMT_cart_to_geo (GMT, &C->lat[1], &C->lon[1], C->B, true); break; case 1: /* Was given coordinates of halfway point; determine A and B */ if (C->r > 180.0) C->longway = true; /* Temporarily adjust if arcs > 180 degrees are chosen */ /* Rotate M by -C->r0/2 degrees about P to get A */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], -0.5 * C->r0, R); GMT_matrix_vect_mult (GMT, 3U, R, M, C->A); /* Get A */ GMT_cart_to_geo (GMT, &C->lat[0], &C->lon[0], C->A, true); /* Rotate M by +C->r0/2 degrees about P to get B */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], +0.5 * C->r0, R); GMT_matrix_vect_mult (GMT, 3U, R, M, C->B); /* Get B */ GMT_cart_to_geo (GMT, &C->lat[1], &C->lon[1], C->B, true); break; case 2: /* Was given coordinates of B point; determine A */ GMT_memcpy (C->B, M, 3, double); C->lon[1] = lon0; C->lat[1] = lat0; if (C->r > 180.0) {C->longway = true; C->r -= 180.0;} /* Temporarily adjust if arcs > 180 degrees are chosen */ /* Rotate B by -C->r0 degrees about P to get A */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], -C->r0, R); GMT_matrix_vect_mult (GMT, 3U, R, C->B, C->A); /* Get A */ GMT_cart_to_geo (GMT, &C->lat[0], &C->lon[0], C->A, true); break; } } } double GMT_smallcircle_az (struct GMT_CTRL *GMT, double lon0, double lat0, double P[], struct GMT_SYMBOL *S) { /* Compute the azimuth at lon,lat [P] along small circle given pole */ double R[3][3], X[3], xlon1, xlat1, xlon2, xlat2, az; /* Make rotation matrix for a +0.005 degree rotation */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], -0.005, R); GMT_matrix_vect_mult (GMT, 3U, R, P, X); /* Get point really close to P along small circle */ GMT_cart_to_geo (GMT, &xlat1, &xlon1, X, true); /* Get coordinates of X */ GMT_make_rot_matrix (GMT, S->v.pole[GMT_X], S->v.pole[GMT_Y], +0.005, R); GMT_matrix_vect_mult (GMT, 3U, R, P, X); /* Get point really close to P along small circle */ GMT_cart_to_geo (GMT, &xlat2, &xlon2, X, true); /* Get coordinates of X */ az = GMT_az_backaz (GMT, xlon1, xlat1, xlon2, xlat2, false); /* Compute the azimuth from P to X at A */ return (az); } void gmt_plot_vector_head (struct GMT_CTRL *GMT, double *xp, double *yp, uint64_t n, struct GMT_SYMBOL *S) { /* PW: Plots the polygon that makes up a vector head. Because sometimes these head stick * across a periodic boundary we must check if that is the case and plot the two parts separately. * When that is the case we cannot draw the outline of the two new polygons since we wish to show * the heads as "clipped" by the boundary; hence all the rigamorole below. */ uint64_t start = 0, nin; unsigned int n_use, *pin = NULL; /* Copy of the pen moves */ unsigned int cap = GMT->PSL->internal.line_cap; double *xin = NULL, *yin = NULL; /* Temp vector with possibly clipped x,y line returned by GMT_geo_to_xy_line */ if ((GMT->current.plot.n = GMT_geo_to_xy_line (GMT, xp, yp, n)) == 0) return; /* All outside, or use plot.x|y array */ PSL_setlinecap (GMT->PSL, PSL_SQUARE_CAP); /* In case there are clipped heads and we want to do the best we can with the lines */ n = GMT->current.plot.n; /* Possibly fewer points */ if (GMT_vec_outline (S->v.status)) { bool close = GMT_polygon_is_open (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.n); nin = n; PSL_command (GMT->PSL, "O0\n"); /* Temporary turn off outline; must draw outline separately when head is split */ if (close) nin++; xin = GMT_memory (GMT, NULL, nin, double); yin = GMT_memory (GMT, NULL, nin, double); pin = GMT_memory (GMT, NULL, nin, unsigned int); GMT_memcpy (xin, GMT->current.plot.x, n, double); GMT_memcpy (yin, GMT->current.plot.y, n, double); GMT_memcpy (pin, GMT->current.plot.pen, n, unsigned int); if (close) { /* Explicitly close the polygon outline */ xin[n] = xin[0]; yin[n] = yin[0]; } } if ((*GMT->current.map.will_it_wrap) (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.n, &start)) { /* Polygon does indeed wrap */ double *xtmp = NULL, *ytmp = NULL; /* Temp vector for map truncating */ GMT_Report (GMT->parent, GMT_MSG_DEBUG, "Vector head polygon will wrap at periodic boundary and will be split into two sections\n"); xtmp = GMT_memory (GMT, NULL, n, double); ytmp = GMT_memory (GMT, NULL, n, double); GMT_memcpy (xtmp, GMT->current.plot.x, n, double); GMT_memcpy (ytmp, GMT->current.plot.y, n, double); /* First truncate against left border */ GMT->current.plot.n = GMT_map_truncate (GMT, xtmp, ytmp, n, start, -1); n_use = (unsigned int)GMT_compact_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.n, false, 0); PSL_beginclipping (GMT->PSL, GMT->current.plot.x, GMT->current.plot.y, (int)n_use, GMT->session.no_rgb, 3); PSL_plotpolygon (GMT->PSL, GMT->current.plot.x, GMT->current.plot.y, (int)n_use); if (GMT_vec_outline (S->v.status)) GMT_plot_line (GMT, xin, yin, pin, nin); PSL_endclipping (GMT->PSL, 1); /* Then truncate against right border */ GMT->current.plot.n = GMT_map_truncate (GMT, xtmp, ytmp, n, start, +1); n_use = (unsigned int)GMT_compact_line (GMT, GMT->current.plot.x, GMT->current.plot.y, GMT->current.plot.n, false, 0); PSL_beginclipping (GMT->PSL, GMT->current.plot.x, GMT->current.plot.y, (int)n_use, GMT->session.no_rgb, 3); PSL_plotpolygon (GMT->PSL, GMT->current.plot.x, GMT->current.plot.y, (int)n_use); if (GMT_vec_outline (S->v.status)) GMT_plot_line (GMT, xin, yin, pin, nin); PSL_endclipping (GMT->PSL, 1); GMT_free (GMT, xtmp); GMT_free (GMT, ytmp); } else { /* No wrapping but may be clipped */ PSL_beginclipping (GMT->PSL, GMT->current.plot.x, GMT->current.plot.y, (int)GMT->current.plot.n, GMT->session.no_rgb, 3); PSL_plotpolygon (GMT->PSL, GMT->current.plot.x, GMT->current.plot.y, (int)GMT->current.plot.n); if (GMT_vec_outline (S->v.status)) GMT_plot_line (GMT, xin, yin, pin, nin); PSL_endclipping (GMT->PSL, 1); } PSL_setlinecap (GMT->PSL, cap); if (GMT_vec_outline (S->v.status)) { /* Turn on outline again and free temp memory */ PSL_command (GMT->PSL, "O1\n"); GMT_free (GMT, xin); GMT_free (GMT, yin); GMT_free (GMT, pin); } } unsigned int gmt_geo_vector_smallcircle (struct GMT_CTRL *GMT, double lon0, double lat0, double azimuth, double length, struct GMT_PEN *ppen, struct GMT_SYMBOL *S) { /* Draws a small-circle vector with our without heads etc. There are some complications to consider: * When there are no heads it is simple. If +n is on we may shrink the line thickness. * With heads tehre are these cases: * Head length is longer than 90% of the vector length. We then skip the head and return 1 * +n is in effect. We shrink vector pen and head length. Still, the shrunk head * may be longer than 90% of the vector length. We then shrink head (not pen) further and return 2 */ uint64_t n1, n2, n, add; int heads, side, outline = 0; unsigned int warn = 0; size_t n_alloc; bool perspective, pure; double P[3], Pa[3], Ax[3], Bx[3], Ax2[3], Bx2[3], R[3][3], h_length_limit, max_length; double dr[2] = {0.0, 0.0}, az[2] = {0.0, 0.0}, oaz[2] = {0.0, 0.0}, scl[2]; double da = 0.0, dshift, s = 1.0, s1 = 1.0, s2 = 1.0, olon[2], olat[2], head_length, arc_width, n_az, arc; double rot[2] = {0.0, 0.0}, rot_v[2] = {0.0, 0.0}; double *xp = NULL, *yp = NULL, *xp2 = NULL, *yp2 = NULL; double *rgb = S->v.fill.rgb; struct GMT_CIRCLE C; /* We must determine points A and B, whose great-circle connector is the arc we seek to draw */ //justify = GMT_vec_justify (S->v.status); /* Return justification as 0-3 */ gmt_scircle_sub (GMT, lon0, lat0, azimuth, length, S, &C); perspective = GMT_IS_PERSPECTIVE (GMT); /* Here we have the endpoints A and B of the great (or small) circle arc */ /* If shrink-option (+n) is active we may have to scale down head attributes and pen width */ /* If shrink-option (+n) is active we may have to scale down head attributes and pen width */ heads = GMT_vec_head (S->v.status); /* Return head selection as 0-3 */ pure = (S->v.v_norm == -1.0f); /* True if no shrinking has been specified */ h_length_limit = (1.0 - S->v.v_stem) * C.r0; /* Max length of arrow in degrees to ensure the stem is still showing */ if (heads == 3) h_length_limit *= 0.5; /* Split this length between the two heads */ if (heads && !pure) { /* Need to determine head length in degrees */ az[0] = GMT_smallcircle_az (GMT, C.lon[0], C.lat[0], C.A, S); /* Compute the azimuth from A to B at A along small circle */ scl[0] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[0], C.lat[0], 0.001 * C.r, az[0]); /* Get local deg/inch scale at A in az[0] direction */ dr[0] = scl[0] * S->size_x; /* This is arrow head length in degrees, approximately */ az[1] = -GMT_smallcircle_az (GMT, C.lon[1], C.lat[1], C.B, S); /* Compute the azimuth from B to A at B along small circle */ scl[1] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[1], C.lat[1], 0.01 * C.r, az[1]); /* Get local deg/inch scale */ dr[1] = scl[1] * S->size_x; /* This is arrow head length in degrees, approximately, adjusted for ~pen thickness to ensure no gap between head and line */ max_length = MAX (dr[0], dr[1]); if (max_length > h_length_limit) { s2 = h_length_limit / max_length; warn = 2; } } /* Might have to shrink things */ if (C.r0 < S->v.v_norm) s1 = C.r0 / S->v.v_norm; if (s1 < s2) { /* Pick the smallest scale required for head shrinking */ s = s1; warn = 0; /* When requesting +n there is no warning unless s2 is the smaller scale */ } else s = s2; head_length = s * S->size_x; arc_width = s1 * S->v.v_width; /* Use scale s1 for pen shrinking */ GMT_memcpy (olon, C.lon, 2, double); GMT_memcpy (olat, C.lat, 2, double); /* Keep copy of original coordinates */ /* When only one side of a vector head is requested (side = -1/+1) there are complications that leads to some * extra work: Since we are clipping the head polygon, the head outline pen is effectively half that of the * vector. Thus, there will be an offset of 1/2 penwidth at the end of the vector line and the start of the * back-end of the half vector head. We adjust this changing the colatitude from the pole by the equivalent * distance of 1/2 pen width away from the side with the half arrowhead. This makes the outline of the head * align with the vector line. */ side = GMT_vec_side (S->v.status); /* Return side selection as 0,-1,+1 */ dshift = (side) ? 0.5 * arc_width : 0.0; /* Half-width of arc thickness if side != 0 */ if (heads & 1) { /* Placing head at A means we must shorten the arc and use Ax instead of A */ az[0] = GMT_smallcircle_az (GMT, C.lon[0], C.lat[0], C.A, S); /* Compute the azimuth from A to B at A along small circle */ scl[0] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[0], C.lat[0], 0.001 * C.r, az[0]); /* Get local deg/inch scale at A in az[0] direction */ dr[0] = scl[0] * (head_length - 1.1*dshift); /* This is arrow head length in degrees, approximately, adjusted for ~pen thickness to ensure no gap between head and line (the 1.1 slop) */ if (pure && dr[0] > h_length_limit) { /* Head length too long, refuse to plot it */ GMT_memcpy (Ax, C.A, 3, double); /* No need to shorten arc at beginning */ heads -= 1; /* Not purse this head any further */ warn = 1; } else { dr[0] /= sind (C.colat); /* Scale dr[0] to opening angle degrees given colatitude */ /* Determine mid-back point of arrow head by rotating A back by chosen fraction rot of dr[0] */ rot_v[0] = 0.5 * dr[0] * (1.95 - GMT->current.setting.map_vector_shape); /* 1.95 instead of 2 to allow for slop */ GMT_make_rot_matrix2 (GMT, C.P, rot_v[0], R); /* Rotation of rot_v[0] degrees about pole P */ GMT_matrix_vect_mult (GMT, 3U, R, C.A, Ax); /* Get Ax = R * A*/ C.rot -= rot_v[0]; /* Shorten full arc by the same amount */ dr[0] = scl[0] * head_length; /* This is arrow head length in great-circle degrees, approximately, without any pen-width compensation */ } } else GMT_memcpy (Ax, C.A, 3, double); /* No need to shorten arc at beginning */ if (heads & 2) { /* Place arrow head at B */ az[1] = -GMT_smallcircle_az (GMT, C.lon[1], C.lat[1], C.B, S); /* Compute the azimuth from B to A at B along small circle */ scl[1] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[1], C.lat[1], 0.01 * C.r, az[1]); /* Get local deg/inch scale */ dr[1] = S->v.scale * (head_length - 1.1*dshift); /* This is arrow head length in degrees, approximately, adjusted for ~pen thickness to ensure no gap between head and line */ if (pure && dr[1] > h_length_limit) { /* Head length too long, refuse to plot it */ GMT_memcpy (Bx, C.B, 3, double); /* No need to shorten arc at end */ heads -= 1; /* Not purse this head any further */ warn = 1; } else { dr[1] /= sind (C.colat); /* Scale dr[1] to opening angle degrees given colatitude */ /* Determine mid-back point of arrow head by rotating B back by chosen fraction rot of dr[1] */ rot_v[1] = 0.5 * dr[1] * (1.95 - GMT->current.setting.map_vector_shape); /* 1.95 instead of 2 to allow for slop */ GMT_make_rot_matrix2 (GMT, C.P, -rot_v[1], R); /* Rotation of -rot_v[1] degrees about pole P */ GMT_matrix_vect_mult (GMT, 3U, R, C.B, Bx); /* Get Bx = R * B*/ C.rot -= rot_v[1]; /* Shorten full arc by the same amount */ dr[1] = scl[1] * head_length; /* This is arrow head length in great-circle degrees, approximately, without any pen-width compensation */ } } else GMT_memcpy (Bx, C.B, 3, double); /* No need to shorten arc at end */ GMT_memcpy (oaz, az, 2, double); /* Keep copy of original azimuths */ /* Get array of lon,lat points that defines the arc */ if (side) { /* Must adjust the distance from pole to A, B by 1/2 the pen width */ double Scl, Off, xlon, xlat, tlon, tlat; GMT_cart_to_geo (GMT, &xlat, &xlon, Ax, true); n_az = GMT_az_backaz (GMT, xlon, xlat, S->v.pole[GMT_X], S->v.pole[GMT_Y], false); /* Compute the azimuth from Ax to P at Ax along great circle */ if (side == +1) n_az += 180.0; /* Might be for side == +1, check */ Scl = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, xlon, xlat, 0.01, n_az); /* Get deg/inch scale at A perpendicular to arc */ Off = Scl * dshift; /* Offset in degrees due to 1/2 pen thickness */ GMT_get_point_from_r_az (GMT, xlon, xlat, Off, n_az, &tlon, &tlat); /* Adjusted Ax */ GMT_geo_to_cart (GMT, tlat, tlon, Ax2, true); GMT_make_rot_matrix2 (GMT, C.P, C.rot, R); /* Rotation of C->rot degrees about pole P */ GMT_matrix_vect_mult (GMT, 3U, R, Ax2, Bx2); /* Get revised Bx = R * Ax */ } else { GMT_memcpy (Ax2, Ax, 3, double); /* No need to shorten arc at end */ GMT_memcpy (Bx2, Bx, 3, double); /* No need to shorten arc at end */ } gmt_circle_pen_poly (GMT, Ax2, Bx2, false, C.rot, ppen, S, &C, s1); if (!heads) return (warn); /* All done */ PSL_command (GMT->PSL, "V\n"); /* Get half-angle at head and possibly change pen */ da = 0.5 * S->v.v_angle; /* Half-opening angle at arrow head */ if ((S->v.status & GMT_VEC_OUTLINE) == 0) PSL_command (GMT->PSL, "O0\n"); /* Turn off outline */ else { GMT_setpen (GMT, &S->v.pen); outline = 1; } if ((S->v.status & GMT_VEC_FILL) == 0) PSL_command (GMT->PSL, "FQ\n"); /* Turn off vector head fill */ else PSL_setfill (GMT->PSL, rgb, outline); if (heads & 1) { /* Place arrow head at A */ if (C.longway) az[0] += 180.0; rot[0] = dr[0] / sind (C.colat); /* Small circle rotation angle to draw arrow outline */ if (side != +1) { /* Want to draw left side of arrow */ GMT_make_rot_matrix2 (GMT, C.A, da, R); /* Rotation of da degrees about A */ GMT_matrix_vect_mult (GMT, 3U, R, C.P, Pa); /* Rotate pole C.P to inner arc pole location Pa */ GMT_make_rot_matrix2 (GMT, Pa, rot[0], R); /* Rotation of rot[0] degrees about Pa */ GMT_matrix_vect_mult (GMT, 3U, R, C.A, P); /* Rotate A to inner arc end point P */ arc = rot[0]; } else { GMT_memcpy (P, Ax, 3, double); /* Start from (possibly adjusted) mid point instead... */ GMT_memcpy (Pa, C.P, 3, double); /* ...and use circle pole */ arc = rot_v[0]; } n1 = (int)gmt_small_circle_arc (GMT, P, C.A, 0.0, Pa, -arc, S, &xp, &yp); /* Compute small circle arc from P to A */ if (side != -1) { /* Want to draw right side of arrow */ GMT_make_rot_matrix2 (GMT, C.A, -da, R); /* Rotation of -da degrees about A */ GMT_matrix_vect_mult (GMT, 3U, R, C.P, Pa); /* Rotate pole C.P to outer arc pole location Pa */ GMT_make_rot_matrix2 (GMT, Pa, rot[0], R); /* Rotation of rot[0] degrees about Pa */ GMT_matrix_vect_mult (GMT, 3U, R, C.A, P); /* Rotate A to outer arc end point P */ arc = rot[0]; } else { GMT_memcpy (P, Ax, 3, double); /* Start from (adjusted) mid point instead... */ GMT_memcpy (Pa, C.P, 3, double); /* ...and use circle pole */ arc = rot_v[0]; } n2 = (unsigned int)gmt_small_circle_arc (GMT, C.A, P, 0.0, Pa, arc, S, &xp2, &yp2); /* Compute great circle arc from A to P */ add = (side == 0) ? 1 : 0; /* Need to add mid point explicitly */ n_alloc = n = n1 + n2 + add; GMT_malloc2 (GMT, xp, yp, 0U, &n_alloc, double); /* Allocate space for total path */ GMT_memcpy (&xp[n1], xp2, n2, double); GMT_memcpy (&yp[n1], yp2, n2, double); if (add) { /* Mid point of arrow */ GMT_cart_to_geo (GMT, &yp[n-1], &xp[n-1], Ax, true); /* Add geo coordinates of this new back mid point for arc */ } gmt_plot_vector_head (GMT, xp, yp, n, S); GMT_free (GMT, xp); GMT_free (GMT, yp); GMT_free (GMT, xp2); GMT_free (GMT, yp2); } if (heads & 2) { /* Place arrow head at B */ if (C.longway) az[1] += 180.0; rot[1] = dr[1] / sind (C.colat); /* Small circle rotation angle to draw arrow outline */ if (side != +1) { /* Want to draw left side of arrow */ GMT_make_rot_matrix2 (GMT, C.B, -da, R); /* Rotation of -da degrees about B */ GMT_matrix_vect_mult (GMT, 3U, R, C.P, Pa); /* Rotate pole C.P to inner arc pole location Pa */ GMT_make_rot_matrix2 (GMT, Pa, -rot[1], R); /* Rotation of -rot[1] degrees about Pa */ GMT_matrix_vect_mult (GMT, 3U, R, C.B, P); /* Rotate B to inner arc end point P */ arc = rot[1]; } else { GMT_memcpy (P, Bx, 3, double); /* Start from (adjusted) mid point instead... */ GMT_memcpy (Pa, C.P, 3, double); /* ...and use circle pole */ arc = rot_v[1]; } n1 = gmt_small_circle_arc (GMT, P, C.B, 0.0, Pa, arc, S, &xp, &yp); /* Compute small circle arc from P to B */ if (side != -1) { /* Want to draw right side of arrow */ GMT_make_rot_matrix2 (GMT, C.B, da, R); /* Rotation of da degrees about B */ GMT_matrix_vect_mult (GMT, 3U, R, C.P, Pa); /* Rotate pole C.P to outer arc pole location Pa */ GMT_make_rot_matrix2 (GMT, Pa, -rot[1], R); /* Rotation of -rot[1] degrees about Pa */ GMT_matrix_vect_mult (GMT, 3U, R, C.B, P); /* Rotate B to outer arc end point P */ arc = rot[1]; } else { GMT_memcpy (P, Bx, 3, double); /* Start from (adjusted) mid point instead */ GMT_memcpy (Pa, C.P, 3, double); /* ...and use circle pole */ arc = rot_v[1]; } n2 = (unsigned int)gmt_small_circle_arc (GMT, C.B, P, 0.0, Pa, -arc, S, &xp2, &yp2); /* Compute small circle arc from B to P */ add = (side == 0) ? 1 : 0; /* Need to add mid point explicitly */ n_alloc = n = n1 + n2 + add; GMT_malloc2 (GMT, xp, yp, 0U, &n_alloc, double); /* Allocate space for total path */ GMT_memcpy (&xp[n1], xp2, n2, double); GMT_memcpy (&yp[n1], yp2, n2, double); if (add) { /* Mid point of arrow */ GMT_cart_to_geo (GMT, &yp[n-1], &xp[n-1], Bx, true); /* Add geo coordinates of this new back-mid point for arc */ } gmt_plot_vector_head (GMT, xp, yp, n, S); GMT_free (GMT, xp); GMT_free (GMT, yp); GMT_free (GMT, xp2); GMT_free (GMT, yp2); } PSL_command (GMT->PSL, "U\n"); return (warn); } unsigned int gmt_geo_vector_greatcircle (struct GMT_CTRL *GMT, double lon0, double lat0, double azimuth, double length, struct GMT_PEN *ppen, struct GMT_SYMBOL *S) { /* Draws a great-circle vector with our without heads, etc. There are some complications to consider: * When there are no heads it is simple. If +n is on we may shrink the line thickness. * With heads tehre are these cases: * Head length is longer than 90% of the vector length. We then skip the head and return 1 * +n is in effect. We shrink vector pen and head length. Still, the shrunk head * may be longer than 90% of the vector length. We then shrink head (not pen) further and return 2 */ uint64_t n1, n2, n, add; int heads, side, outline = 0; unsigned int warn = 0; size_t n_alloc; bool perspective, pure; double tlon, tlat, mlon, mlat, P[3], Ax[3], Bx[3], h_length_limit, max_length; double dr[2] = {0.0, 0.0}, az[2] = {0.0, 0.0}, oaz[2] = {0.0, 0.0}, off[2] = {0.0, 0.0}; double da = 0.0, dshift, s = 1.0, s1 = 1.0, s2 = 1.0, olon[2], olat[2], head_length, arc_width, rot, scl[2]; double *xp = NULL, *yp = NULL, *xp2 = NULL, *yp2 = NULL; double *rgb = S->v.fill.rgb; struct GMT_CIRCLE C; /* We must determine points A and B, whose great-circle connector is the arc we seek to draw */ gmt_gcircle_sub (GMT, lon0, lat0, azimuth, length, S, &C); perspective = GMT_IS_PERSPECTIVE (GMT); /* Here we have the endpoints A and B of the great (or small) circle arc */ /* If shrink-option (+n) is active we may have to scale down head attributes and pen width */ pure = (S->v.v_norm == -1.0f); /* True if no shrinking has been specified */ heads = GMT_vec_head (S->v.status); /* Return head selection as 0-3 */ h_length_limit = (1.0 - S->v.v_stem) * C.r0; /* Max length of arrow in degrees to ensure the stem is still showing */ if (heads == 3) h_length_limit *= 0.5; /* Split this length between the two heads */ if (heads && !pure) { /* Need to determine head length in degrees */ az[0] = GMT_az_backaz (GMT, C.lon[0], C.lat[0], C.lon[1], C.lat[1], false); /* Compute the azimuth from A to B at A along great circle */ scl[0] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[0], C.lat[0], 0.001 * C.r, az[0]); /* Get local deg/inch scale at A in az[0] direction */ dr[0] = scl[0] * S->size_x; /* This is arrow head length in degrees, approximately */ az[1] = GMT_az_backaz (GMT, C.lon[1], C.lat[1], C.lon[0], C.lat[0], false); /* Compute the azimuth from B to A at B along great circle */ scl[1] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[1], C.lat[1], 0.01 * C.r, az[1]); /* Get local deg/inch scale */ dr[1] = scl[1] * S->size_x; /* This is arrow head length in degrees, approximately, adjusted for ~pen thickness to ensure no gap between head and line */ max_length = MAX (dr[0], dr[1]); if (max_length > h_length_limit) { s2 = h_length_limit / max_length; warn = 2; } } /* Might have to shrink things */ if (C.r0 < S->v.v_norm) s1 = C.r0 / S->v.v_norm; if (s1 < s2) { /* Pick the smallest scale required for head shrinking */ s = s1; warn = 0; /* When requesting +n there is no warning unless s2 is the smaller scale */ } else s = s2; head_length = s * S->size_x; arc_width = s1 * S->v.v_width; /* Use scale s1 for pen shrinking */ GMT_memcpy (olon, C.lon, 2, double); GMT_memcpy (olat, C.lat, 2, double); /* Keep copy of original coordinates */ /* When only one side of a vector head is requested (side = -1/+1) there are complications that leads to some * extra work: Since we are clipping the head polygon, the head outline pen is effectively half that of the * vector. Thus, there will be an offset of 1/2 penwidth at the end of the vector line and the start of the * back-end of the half vector head. We adjust this (similar to straight and curved vectors in pslib) by moving * the vector tip and the mid-vector back point the equivalent distance of 1/2 pen width away from the side with * the half arrowhead. This makes the outline of the head align with the vector line. */ side = GMT_vec_side (S->v.status); /* Return side selection as 0,-1,+1 */ dshift = (side) ? 0.5 * arc_width : 0.0; /* Half-width of arc thickness if side != 0 */ if (heads & 1) { /* Placing head at A means we must shorten the arc and use Ax instead of A */ az[0] = GMT_az_backaz (GMT, C.lon[0], C.lat[0], C.lon[1], C.lat[1], false); /* Compute the azimuth from A to B at A along great circle */ scl[0] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[0], C.lat[0], 0.001 * C.r, az[0]); /* Get local deg/inch scale at A in az[0] direction */ dr[0] = scl[0] * (head_length - 1.1*dshift); /* This is arrow head length in degrees, approximately, adjusted for ~pen thickness to ensure no gap between head and line */ if (pure && dr[0] > h_length_limit) { /* Head length too long, refuse to plot it */ GMT_memcpy (Ax, C.A, 3, double); /* No need to shorten arc at beginning */ heads -= 1; /* Not purse this head any further */ warn = 1; } else { GMT_get_point_from_r_az (GMT, C.lon[0], C.lat[0], 0.5*dr[0]*(1.95 - GMT->current.setting.map_vector_shape), az[0], &tlon, &tlat); /* Back mid-point of arrow */ GMT_geo_to_cart (GMT, tlat, tlon, Ax, true); /* Get Cartesian coordinates of this new start point for arc */ dr[0] = scl[0] * head_length; /* This is arrow head length in degrees, approximately, without any pen-width compensation */ } } else GMT_memcpy (Ax, C.A, 3, double); /* No need to shorten arc at beginning */ if (heads & 2) { /* Place arrow head at B */ az[1] = GMT_az_backaz (GMT, C.lon[1], C.lat[1], C.lon[0], C.lat[0], false); /* Compute the azimuth from B to A at B along great circle */ scl[1] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, C.lon[1], C.lat[1], 0.01 * C.r, az[1]); /* Get local deg/inch scale */ dr[1] = scl[1] * (head_length - 1.1*dshift); /* This is arrow head length in degrees, approximately, adjusted for ~pen thickness to ensure no gap between head and line */ if (pure && dr[1] > h_length_limit) { /* Head length too long, refuse to plot it */ GMT_memcpy (Bx, C.B, 3, double); /* No need to shorten arc at end */ heads -= 2; /* Not purse this head any further */ warn = 1; } else { GMT_get_point_from_r_az (GMT, C.lon[1], C.lat[1], 0.5*dr[1]*(1.95 - GMT->current.setting.map_vector_shape), az[1], &tlon, &tlat); /* Back mid-point of arrow */ GMT_geo_to_cart (GMT, tlat, tlon, Bx, true); /* Get Cartesian coordinates of this new end point for arc */ dr[1] = scl[1] * head_length; /* This is arrow head length in degrees, approximately, without any pen-width compensation */ } } else GMT_memcpy (Bx, C.B, 3, double); /* No need to shorten arc at end */ GMT_memcpy (oaz, az, 2, double); /* Keep copy of original azimuths */ rot = d_acosd (GMT_dot3v (GMT, Ax, Bx)); /* opening angle in degrees */ gmt_circle_pen_poly (GMT, Ax, Bx, C.longway, rot, ppen, S, &C, s1); if (!heads) return (warn); /* All done */ /* Get half-angle at head and possibly change pen */ da = 0.5 * S->v.v_angle; /* Half-opening angle at arrow head */ PSL_command (GMT->PSL, "V\n"); if ((S->v.status & GMT_VEC_OUTLINE) == 0) PSL_command (GMT->PSL, "O0\n"); /* Turn off outline */ else { GMT_setpen (GMT, &S->v.pen); outline = 1; } if ((S->v.status & GMT_VEC_FILL) == 0) PSL_command (GMT->PSL, "FQ\n"); /* Turn off vector head fill */ else PSL_setfill (GMT->PSL, rgb, outline); if (heads & 1) { /* Place arrow head at A */ if (C.longway) az[0] += 180.0; GMT_get_point_from_r_az (GMT, C.lon[0], C.lat[0], 0.5*dr[0]*(2.0 - GMT->current.setting.map_vector_shape), az[0], &mlon, &mlat); /* Back mid-point of arrow */ if (side) { /* Must adjust the back mid- and end point by 1/2 the pen width */ az[0] = GMT_az_backaz (GMT, mlon, mlat, C.lon[1], C.lat[1], false); /* Compute the azimuth from M to B at M */ scl[0] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, mlon, mlat, tand (da) * dr[0], az[0]+side*90.0); /* Get deg/inch scale at M perpendicular to arc */ off[0] = scl[0] * dshift; /* Offset in degrees due to 1/2 pen thickness */ GMT_get_point_from_r_az (GMT, mlon, mlat, off[0], az[0]+side*90.0, &tlon, &tlat); /* Adjusted back mid-point of arrow head */ mlon = tlon; mlat = tlat; /* Update shifted mid-point */ GMT_get_point_from_r_az (GMT, C.lon[0], C.lat[0], off[0], oaz[0]+side*90.0, &tlon, &tlat); /* Adjusted tip of arrow head A */ C.lon[0] = tlon; C.lat[0] = tlat; /* Update shifted A location */ GMT_geo_to_cart (GMT, tlat, tlon, C.A, true); /* New A vector */ } if (side != +1) { /* Want to draw left side of arrow */ GMT_get_point_from_r_az (GMT, olon[0], olat[0], dr[0]+off[0], oaz[0]+da, &tlon, &tlat); /* Start point of arrow on left side */ GMT_geo_to_cart (GMT, tlat, tlon, P, true); } else GMT_geo_to_cart (GMT, mlat, mlon, P, true); /* Start from (adjusted) mid point instead */ n1 = gmt_great_circle_arc (GMT, P, C.A, 0.0, false, S, &xp, &yp); /* Compute great circle arc from P to A */ if (side != -1) { /* Want to draw right side of arrow */ GMT_get_point_from_r_az (GMT, olon[0], olat[0], dr[0]+off[0], oaz[0]-da, &tlon, &tlat); /* End point of arrow on right side */ GMT_geo_to_cart (GMT, tlat, tlon, P, true); } else GMT_geo_to_cart (GMT, mlat, mlon, P, true); /* End at (adjusted) mid point instead */ n2 = gmt_great_circle_arc (GMT, C.A, P, 0.0, false, S, &xp2, &yp2); /* Compute great circle arc from A to P */ add = (side == 0) ? 1 : 0; /* Need to add mid point explicitly */ n_alloc = n = n1 + n2 + add; GMT_malloc2 (GMT, xp, yp, 0U, &n_alloc, double); /* Allocate space for total path */ GMT_memcpy (&xp[n1], xp2, n2, double); GMT_memcpy (&yp[n1], yp2, n2, double); if (add) { /* Mid point of arrow */ xp[n-1] = mlon; yp[n-1] = mlat; } gmt_plot_vector_head (GMT, xp, yp, n, S); GMT_free (GMT, xp); GMT_free (GMT, yp); GMT_free (GMT, xp2); GMT_free (GMT, yp2); } if (heads & 2) { /* Place arrow head at B */ if (C.longway) az[1] += 180.0; GMT_get_point_from_r_az (GMT, C.lon[1], C.lat[1], 0.5*dr[1]*(2.0 - GMT->current.setting.map_vector_shape), az[1], &mlon, &mlat); /* Mid point of arrow */ if (side) { /* Must adjust the mid-point and end point by 1/2 the pen width */ az[1] = GMT_az_backaz (GMT, C.lon[1], C.lat[1], C.lon[0], C.lat[0], false); /* Compute the azimuth from M to A at M */ scl[1] = (perspective) ? S->v.scale : gmt_get_local_scale (GMT, mlon, mlat, tand (da) * dr[1], az[1]+side*90.0); /* Get deg/inch scale at M perpendicular to arc */ off[1] = scl[1] * dshift; /* Offset in degrees due to 1/2 pen thickness */ GMT_get_point_from_r_az (GMT, mlon, mlat, off[1], az[1]+side*90.0, &tlon, &tlat); /* Adjusted back mid-point of arrow head */ mlon = tlon; mlat = tlat; /* Update shifted mid-point */ GMT_get_point_from_r_az (GMT, C.lon[1], C.lat[1], off[1], oaz[1]+side*90.0, &tlon, &tlat); /* Adjusted tip of arrow head */ C.lon[1] = tlon; C.lat[1] = tlat; /* Update shifted B location */ GMT_geo_to_cart (GMT, tlat, tlon, C.B, true); /* New B vector */ } if (side != +1) { /* Want to draw left side of arrow */ GMT_get_point_from_r_az (GMT, olon[1], olat[1], dr[1]+off[1], oaz[1]+da, &tlon, &tlat); /* Start point of arrow on left side */ GMT_geo_to_cart (GMT, tlat, tlon, P, true); } else GMT_geo_to_cart (GMT, mlat, mlon, P, true); /* Start from (adjusted)mid point instead */ n1 = gmt_great_circle_arc (GMT, P, C.B, 0.0, false, S, &xp, &yp); /* Compute great circle arc from P to B */ if (side != -1) { /* Want to draw right side of arrow */ GMT_get_point_from_r_az (GMT, olon[1], olat[1], dr[1]+off[1], oaz[1]-da, &tlon, &tlat); /* Start point of arrow on other side */ GMT_geo_to_cart (GMT, tlat, tlon, P, true); } else GMT_geo_to_cart (GMT, mlat, mlon, P, true); /* End at (adjusted) mid point instead */ n2 = gmt_great_circle_arc (GMT, C.B, P, 0.0, false, S, &xp2, &yp2); /* Compute great circle arc from B to P */ add = (side == 0) ? 1 : 0; /* Need to add mid point explicitly */ n_alloc = n = n1 + n2 + add; GMT_malloc2 (GMT, xp, yp, 0U, &n_alloc, double); /* Allocate space for total path */ GMT_memcpy (&xp[n1], xp2, n2, double); GMT_memcpy (&yp[n1], yp2, n2, double); if (add) { /* Mid point of arrow */ xp[n-1] = mlon; yp[n-1] = mlat; } gmt_plot_vector_head (GMT, xp, yp, n, S); GMT_free (GMT, xp); GMT_free (GMT, yp); GMT_free (GMT, xp2); GMT_free (GMT, yp2); } PSL_command (GMT->PSL, "U\n"); return (warn); } unsigned int GMT_geo_vector (struct GMT_CTRL *GMT, double lon0, double lat0, double azimuth, double length, struct GMT_PEN *pen, struct GMT_SYMBOL *S) { /* GMT_geo_vector takes the location lon0, lat0, azimuth of the vector at that point, and the length (in km), and and draws the vector using the chosen map projection. If arrow heads have been requested we compute an arc length in degrees that is equivalent to the chosen symbol size. With arrow heads we also shorten the vector arc so that unfilled vector heads are possible. If a small-circle vector is chosen then azimuth, length may be opening angles 1 and 2 if GMT_VEC_ANGLES is set as well. */ unsigned int warn; if ((S->v.status & GMT_VEC_SCALE) == 0) { /* Must determine the best inch to degree scale for this map */ S->v.scale = gmt_inch_to_degree_scale (GMT); S->v.status |= GMT_VEC_SCALE; } if (S->v.status & GMT_VEC_POLE) warn = gmt_geo_vector_smallcircle (GMT, lon0, lat0, azimuth, length, pen, S); else warn = gmt_geo_vector_greatcircle (GMT, lon0, lat0, azimuth, length, pen, S); return (warn); } void GMT_geo_rectangle (struct GMT_CTRL *GMT, double lon, double lat, double width, double height, double azimuth) { /* GMT_geo_rectangle takes the location, axes (in km), and azimuth of a rectangle and draws the rectangle using the chosen map projection */ int jump; double sin_azimuth, cos_azimuth, sinp, cosp, x, y, x_prime, y_prime, rho, c, dim[3]; double sin_c, cos_c, center, lon_w, lat_w, lon_h, lat_h, xp, yp, xw, yw, xh, yh; struct PSL_CTRL *PSL= GMT->PSL; azimuth = GMT_azim_to_angle (GMT, lon, lat, 0.1, azimuth); GMT_geo_to_xy (GMT, lon, lat, &xp, &yp); /* Center of rectangle */ width *= 500.0, height *= 500.0; /* Convert to meters and get half the size */ dim[0] = azimuth; sincosd (azimuth, &sin_azimuth, &cos_azimuth); sincosd (lat, &sinp, &cosp); /* Set up azimuthal equidistant projection */ center = (GMT->current.proj.central_meridian < GMT->common.R.wesn[XLO] || GMT->current.proj.central_meridian > GMT->common.R.wesn[XHI]) ? 0.5 * (GMT->common.R.wesn[XLO] + GMT->common.R.wesn[XHI]) : GMT->current.proj.central_meridian; /* Get first point width away from center */ sincos (0.0, &y, &x); x *= width; y *= height; /* Get rotated coordinates in m */ x_prime = x * cos_azimuth - y * sin_azimuth; y_prime = x * sin_azimuth + y * cos_azimuth; /* Convert m back to lon lat */ rho = hypot (x_prime, y_prime); c = rho / GMT->current.proj.EQ_RAD; sincos (c, &sin_c, &cos_c); lat_w = d_asind (cos_c * sinp + (y_prime * sin_c * cosp / rho)); if ((lat - 90.0) > -GMT_CONV_LIMIT) /* origin in Northern hemisphere */ lon_w = lon + d_atan2d (x_prime, -y_prime); else if ((lat + 90.0) < GMT_CONV_LIMIT) /* origin in Southern hemisphere */ lon_w = lon + d_atan2d (x_prime, y_prime); else lon_w = lon + d_atan2d (x_prime * sin_c, (rho * cosp * cos_c - y_prime * sinp * sin_c)); while ((lon_w - center) < -180.0) lon_w += 360.0; while ((lon_w - center) > +180.0) lon_w -= 360.0; GMT_geo_to_xy (GMT, lon_w, lat_w, &xw, &yw); /* Get projected x,y coordinates */ if ((jump = (*GMT->current.map.jump) (GMT, xp, yp, xw, yw))) /* Adjust for map jumps */ xw += jump * 2.0 * GMT_half_map_width (GMT, yp); dim[1] = 2.0 * hypot (xp - xw, yp - yw); /* Estimate of rectangle width in plot units (inch) */ /* Get 2nd point height away from center */ sincos (M_PI_2, &y, &x); x *= width; y *= height; /* Get rotated coordinates in m */ x_prime = x * cos_azimuth - y * sin_azimuth; y_prime = x * sin_azimuth + y * cos_azimuth; /* Convert m back to lon lat */ rho = hypot (x_prime, y_prime); c = rho / GMT->current.proj.EQ_RAD; sincos (c, &sin_c, &cos_c); lat_h = d_asind (cos_c * sinp + (y_prime * sin_c * cosp / rho)); if ((lat - 90.0) > -GMT_CONV_LIMIT) /* origin in Northern hemisphere */ lon_h = lon + d_atan2d (x_prime, -y_prime); else if ((lat + 90.0) < GMT_CONV_LIMIT) /* origin in Southern hemisphere */ lon_h = lon + d_atan2d (x_prime, y_prime); else lon_h = lon + d_atan2d (x_prime * sin_c, (rho * cosp * cos_c - y_prime * sinp * sin_c)); while ((lon_h - center) < -180.0) lon_h += 360.0; while ((lon_h - center) > +180.0) lon_h -= 360.0; GMT_geo_to_xy (GMT, lon_h, lat_h, &xh, &yh); if ((jump = (*GMT->current.map.jump) (GMT, xp, yp, xh, yh))) /* Adjust for map jumps */ xh += jump * 2.0 * GMT_half_map_width (GMT, yp); dim[2] = 2.0 * hypot (xp - xh, yp - yh); /* Estimate of rectangle width in plot units (inch) */ PSL_plotsymbol (PSL, xp, yp, dim, PSL_ROTRECT); } void GMT_draw_front (struct GMT_CTRL *GMT, double x[], double y[], uint64_t n, struct GMT_FRONTLINE *f) { int ngap, tmp_join = 0, tmp_limit = 0; bool skip; uint64_t i; double *s = NULL, xx[4], yy[4], dist = 0.0, w, frac, dx, dy, angle, dir1, dir2; double gap, x0, y0, xp, yp, len2, len3, cosa, sina, sa, ca, offx, offy, dim[3]; struct PSL_CTRL *PSL= GMT->PSL; if (n < 2) return; s = GMT_memory (GMT, NULL, n, double); for (i = 1, s[0] = 0.0; i < n; i++) { /* Watch out for longitude wraps */ dx = x[i] - x[i-1]; w = GMT_half_map_width (GMT, y[i]); if (GMT->current.map.is_world && dx > w) dx = copysign (2.0 * w - fabs (dx), -dx); s[i] = s[i-1] + hypot (dx, y[i] - y[i-1]); } if (f->f_gap > 0.0) { /* Gave positive interval; adjust so we start and end with a tick on each line */ ngap = irint (s[n-1] / f->f_gap); gap = s[n-1] / ngap; dist = f->f_off; /* Start off at the offset distance [0] */ ngap++; } else { /* Gave negative interval which means the # of ticks required */ ngap = irint (fabs (f->f_gap)); if (ngap == 0) { /* Cannot happen but might as well leave the test in case of snafus */ GMT_Report (GMT->parent, GMT_MSG_NORMAL, "Warning: Number of front ticks reset from 0 to 1 (check your arguments)\n"); ngap = 1; } if (ngap == 1) /* Single centered tick */ dist = 0.5 * s[n-1], gap = s[n-1]; else /* Equidistantly spaced tick starting at 1st point and ending at last */ gap = s[n-1] / (ngap - 1); } len2 = 0.5 * f->f_len; len3 = 0.866025404 * f->f_len; if (f->f_sense == GMT_FRONT_CENTERED) len3 = len2; if (f->f_symbol) { /* Temporarily use miter to get sharp points at slip vectors */ tmp_join = PSL->internal.line_join; PSL_setlinejoin (PSL, 0); tmp_limit = PSL->internal.miter_limit; PSL_setmiterlimit (PSL, 0); } i = 0; while (i < n) { while ((s[i] - dist) > -GMT_SMALL) { /* Time for tick */ if (i > 0) { dx = x[i] - x[i-1]; dy = y[i] - y[i-1]; } else { dx = x[1] - x[0]; dy = y[1] - y[0]; } if (fabs (dist - s[i]) < GMT_SMALL) { x0 = x[i]; y0 = y[i]; } else { frac = (s[i] - dist) / (s[i] - s[i-1]); x0 = x[i] - dx * frac; y0 = y[i] - dy * frac; } angle = d_atan2 (dy, dx); skip = (GMT->current.map.is_world && fabs (dx) > GMT_half_map_width (GMT, y[i])); /* Don't do ticks on jumps */ if (skip) { dist += gap; i++; continue; } switch (f->f_symbol) { case GMT_FRONT_TRIANGLE: /* Triangle */ switch (f->f_sense) { case GMT_FRONT_CENTERED: sincos (angle, &sina, &cosa); xx[0] = x0 + len2 * cosa; yy[0] = y0 + len2 * sina; xx[1] = x0 - len3 * sina; yy[1] = y0 + len3 * cosa; xx[2] = x0 - len2 * cosa; yy[2] = y0 - len2 * sina; xx[3] = x0 + len3 * sina; yy[3] = y0 - len3 * cosa; PSL_plotpolygon (PSL, xx, yy, 4); break; case GMT_FRONT_RIGHT: angle += M_PI; case GMT_FRONT_LEFT: sincos (angle, &sina, &cosa); xx[0] = x0 + len2 * cosa; yy[0] = y0 + len2 * sina; xx[1] = x0 - len3 * sina; yy[1] = y0 + len3 * cosa; xx[2] = x0 - len2 * cosa; yy[2] = y0 - len2 * sina; PSL_plotpolygon (PSL, xx, yy, 3); break; } break; case GMT_FRONT_CIRCLE: /* Circles */ switch (f->f_sense) { case GMT_FRONT_CENTERED: PSL_plotsymbol (PSL, x0, y0, &(f->f_len), PSL_CIRCLE); break; case GMT_FRONT_RIGHT: angle += M_PI; case GMT_FRONT_LEFT: dir1 = R2D * angle; dir2 = dir1 + 180.0; if (dir1 > dir2) dir1 -= 360.0; dim[0] = len2, dim[1] = dir1, dim[2] = dir2; PSL_plotsymbol (PSL, x0, y0, dim, PSL_WEDGE); break; } break; case GMT_FRONT_BOX: /* Squares */ switch (f->f_sense) { case GMT_FRONT_CENTERED: /* Full square centered on line */ sincos (angle, &sina, &cosa); xx[0] = x0 + len2 * (cosa + sina); /* LR */ yy[0] = y0 + len2 * (sina - cosa); xx[1] = x0 + len2 * (cosa - sina); /* UR */ yy[1] = y0 + len2 * (sina + cosa); xx[2] = x0 + len2 * (-cosa - sina); /* UL */ yy[2] = y0 + len2 * (-sina + cosa); xx[3] = x0 + len2 * (-cosa + sina); /* LL */ yy[3] = y0 + len2 * (-sina - cosa); break; case GMT_FRONT_RIGHT: angle += M_PI; case GMT_FRONT_LEFT: /* Half square on the chosen side */ sincos (angle, &sina, &cosa); xx[0] = x0 + len2 * (cosa); /* LR */ yy[0] = y0 + len2 * (sina); xx[1] = x0 + len2 * (cosa - sina); /* UR */ yy[1] = y0 + len2 * (sina + cosa); xx[2] = x0 + len2 * (-cosa - sina); /* UL */ yy[2] = y0 + len2 * (-sina + cosa); xx[3] = x0 + len2 * (-cosa); /* LL */ yy[3] = y0 + len2 * (-sina); break; } PSL_plotpolygon (PSL, xx, yy, 4); break; case GMT_FRONT_SLIP: /* draw strike-slip arrows */ sincos (angle, &sina, &cosa); offx = GMT->current.setting.map_annot_offset[0] * sina; /* get offsets from front line */ offy = GMT->current.setting.map_annot_offset[0] * cosa; /* sense == GMT_FRONT_LEFT == left-lateral, R_RIGHT = right lateral */ /* arrow "above" line */ sincos (angle + (f->f_sense * 30.0 * D2R), &sa, &ca); xp = x0 + f->f_sense * offx; yp = y0 - f->f_sense * offy; xx[0] = xp - len2 * cosa; yy[0] = yp - len2 * sina; xx[1] = xp + len2 * cosa; yy[1] = yp + len2 * sina; xx[2] = xx[1] - len2 * ca; yy[2] = yy[1] - len2 * sa; PSL_plotline (PSL, xx, yy, 3, PSL_MOVE + PSL_STROKE); /* arrow "below" line */ sincos (angle - (f->f_sense * 150.0 *D2R), &sa, &ca); xp = x0 - f->f_sense * offx; yp = y0 + f->f_sense * offy; xx[0] = xp + len2 * cosa; yy[0] = yp + len2 * sina; xx[1] = xp - len2 * cosa; yy[1] = yp - len2 * sina; xx[2] = xx[1] - len2 * ca; yy[2] = yy[1] - len2 * sa; PSL_plotline (PSL, xx, yy, 3, PSL_MOVE + PSL_STROKE); break; case GMT_FRONT_FAULT: /* Normal fault ticks */ xx[0] = xx[1] = x0, yy[0] = yy[1] = y0; if (f->f_sense == GMT_FRONT_CENTERED) { angle -= M_PI_2; sincos (angle, &sina, &cosa); xx[0] += len2 * cosa; yy[0] += len2 * sina; xx[1] -= len2 * cosa; yy[1] -= len2 * sina; } else { angle += (f->f_sense * M_PI_2); sincos (angle, &sina, &cosa); xx[1] += len2 * cosa; yy[1] += len2 * sina; } PSL_plotline (PSL, xx, yy, 2, PSL_MOVE + PSL_STROKE); break; } dist += gap; } i++; } GMT_free (GMT, s); if (f->f_symbol) { /* Switch line join style back */ PSL_setlinejoin (PSL, tmp_join); PSL_setmiterlimit (PSL, tmp_limit); } } void GMT_plane_perspective (struct GMT_CTRL *GMT, int plane, double level) { /* This routine write the PostScript code to change any following matter printed in the plane * of the paper into a perspective view of that plane based on the GMT->current.proj.z_project * parameters (azimuth and elevation). * The plane is portrayed as a plane of constant X, Y, or Z. * Input arguments: * GMT : The GMT struct * PSL : The PSL struct * plane: The perspective plane if a constant X, Y, or Z (GMT_X = 0, GMT_Y = 1, GMT_Z = 2) * To indicate that the z-level is not in projected but "world" coordinates, add GMT_ZW = 3 * To reset to normal printing, use -1. * level: Level of X, Y, or Z in projected coordinates (inch). */ double a, b, c, d, e, f; struct PSL_CTRL *PSL= GMT->PSL; /* Only do this in 3D mode */ if (!GMT->current.proj.three_D) return; /* Nothing changed since last call, hence ignore */ if (plane == GMT->current.proj.z_project.plane && GMT_eq(level,GMT->current.proj.z_project.level)) return; /* Store value of level (store plane at end) */ GMT->current.proj.z_project.level = level; /* Concat contains the proper derivatives of these functions: x_out = - x * GMT->current.proj.z_project.cos_az + y * GMT->current.proj.z_project.sin_az + GMT->current.proj.z_project.x_off; y_out = - (x * GMT->current.proj.z_project.sin_az + y * GMT->current.proj.z_project.cos_az) * GMT->current.proj.z_project.sin_el + z * GMT->current.proj.z_project.cos_el + GMT->current.proj.z_project.y_off; */ a = b = c = d = e = f = 0.0; if (plane < 0) /* Reset to original matrix */ PSL_command (PSL, "PSL_GPP setmatrix\n"); else { /* New perspective plane: compute all derivatives and use full matrix */ if (plane >= GMT_ZW) level = GMT_z_to_zz (GMT, level); /* First convert world z coordinate to projected z coordinate */ switch (plane % 3) { case GMT_X: /* Constant x, Convert y,z to x',y' */ a = GMT->current.proj.z_project.sin_az; b = -GMT->current.proj.z_project.cos_az * GMT->current.proj.z_project.sin_el; c = 0.0; d = GMT->current.proj.z_project.cos_el; e = GMT->current.proj.z_project.x_off - level * GMT->current.proj.z_project.cos_az; f = GMT->current.proj.z_project.y_off - level * GMT->current.proj.z_project.sin_az * GMT->current.proj.z_project.sin_el; break; case GMT_Y: /* Constant y. Convert x,z to x',y' */ a = -GMT->current.proj.z_project.cos_az; b = -GMT->current.proj.z_project.sin_az * GMT->current.proj.z_project.sin_el; c = 0.0; d = GMT->current.proj.z_project.cos_el; e = GMT->current.proj.z_project.x_off + level * GMT->current.proj.z_project.sin_az; f = GMT->current.proj.z_project.y_off - level * GMT->current.proj.z_project.cos_az * GMT->current.proj.z_project.sin_el; break; case GMT_Z: /* Constant z. Convert x,y to x',y' */ a = -GMT->current.proj.z_project.cos_az; b = -GMT->current.proj.z_project.sin_az * GMT->current.proj.z_project.sin_el; c = GMT->current.proj.z_project.sin_az; d = -GMT->current.proj.z_project.cos_az * GMT->current.proj.z_project.sin_el; e = GMT->current.proj.z_project.x_off; f = GMT->current.proj.z_project.y_off + level * GMT->current.proj.z_project.cos_el; break; } /* First restore the old matrix or save the old one when that was not done before */ PSL_command (PSL, "%s [%g %g %g %g %g %g] concat\n", (GMT->current.proj.z_project.plane >= 0) ? "PSL_GPP setmatrix" : "/PSL_GPP matrix currentmatrix def", a, b, c, d, e * PSL->internal.x2ix, f * PSL->internal.y2iy); } /* Store value of plane */ GMT->current.proj.z_project.plane = plane; }