/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkStructuredGrid.h,v $
  Language:  C++
  Date:      $Date: 2001/11/15 14:20:16 $
  Version:   $Revision: 1.88 $

  
Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .NAME vtkStructuredGrid - topologically regular array of data
// .SECTION Description
// vtkStructuredGrid is a data object that is a concrete implementation of
// vtkDataSet. vtkStructuredGrid represents a geometric structure that is a
// topologically regular array of points. The topology is that of a cube that
// has been subdivided into a regular array of smaller cubes. Each point/cell
// can be addressed with i-j-k indices. Examples include finite difference 
// grids.
//
// A unusual feature of vtkStructuredGrid is the ability to blank, 
// or "turn-off" points and cells in the dataset. This is controlled by 
// defining a "blanking array" whose values (0,1) specify whether
// a point should be blanked or not.

#ifndef __vtkStructuredGrid_h
#define __vtkStructuredGrid_h

#include "vtkPointSet.h"
#include "vtkStructuredData.h"
#include "vtkUnsignedCharArray.h"

class vtkVertex;
class vtkLine;
class vtkQuad;
class vtkHexahedron;
class vtkEmptyCell;

class VTK_COMMON_EXPORT vtkStructuredGrid : public vtkPointSet 
{
public:
  static vtkStructuredGrid *New();

  vtkTypeMacro(vtkStructuredGrid,vtkPointSet);
  void PrintSelf(ostream& os, vtkIndent indent);
 
  // Description:
  // Return what type of dataset this is.
  int GetDataObjectType() {return VTK_STRUCTURED_GRID;}

  // Description:
  // Create a similar type object
  vtkDataObject *MakeObject() {return vtkStructuredGrid::New();}

  // Description:
  // Copy the geometric and topological structure of an input poly data object.
  void CopyStructure(vtkDataSet *ds);

  // Description:
  // Standard vtkDataSet API methods. See vtkDataSet for more information.
  vtkIdType GetNumberOfPoints() {return vtkPointSet::GetNumberOfPoints();}
  float *GetPoint(vtkIdType ptId) {return this->vtkPointSet::GetPoint(ptId);}
  void GetPoint(vtkIdType ptId, float p[3])
    {this->vtkPointSet::GetPoint(ptId,p);}
  vtkCell *GetCell(vtkIdType cellId);
  void GetCell(vtkIdType cellId, vtkGenericCell *cell);
  void GetCellBounds(vtkIdType cellId, float bounds[6]);
  int GetCellType(vtkIdType cellId);
  vtkIdType GetNumberOfCells();
  void GetCellPoints(vtkIdType cellId, vtkIdList *ptIds);
  void GetPointCells(vtkIdType ptId, vtkIdList *cellIds)
    {
      vtkStructuredData::GetPointCells(ptId,cellIds,this->GetDimensions());
    }
  void Initialize();
  int GetMaxCellSize() {return 8;}; //hexahedron is the largest
  void GetCellNeighbors(vtkIdType cellId, vtkIdList *ptIds,
                        vtkIdList *cellIds);
  virtual void GetScalarRange(float range[2]);
  float *GetScalarRange() {return this->vtkPointSet::GetScalarRange();}

  // Description:
  // following methods are specific to structured grid
  void SetDimensions(int i, int j, int k);
  void SetDimensions(int dim[3]);

  // Description:
  // Get dimensions of this structured points dataset.
  virtual int *GetDimensions ();
  virtual void GetDimensions (int dim[3]);

  // Description:
  // Return the dimensionality of the data.
  int GetDataDimension();

  // Description:
  // Methods for supporting blanking of cells. Blanking turns on or off
  // points in the structured grid, and hence the cells connected to them.
  void SetBlanking(int blanking);
  int GetBlanking() {return this->Blanking;}
  void BlankingOn();
  void BlankingOff();
  void BlankPoint(vtkIdType ptId);
  void UnBlankPoint(vtkIdType ptId);
  
  // Description:
  // Get the array that defines the blanking (visibility) of each point.
  vtkUnsignedCharArray *GetPointVisibility() 
    {return this->PointVisibility;}

  // Description:
  // Set an array that defines the (blanking) visibility of the points 
  // in the grid. Make sure that length of the visibility array matches 
  // the number of points in the grid.
  void SetPointVisibility(vtkUnsignedCharArray *pointVisibility);

  // Description:
  // Return non-zero value if specified point is visible. Use this method 
  // only if blanking has been enabled (with BlankingOn()).
  unsigned char IsPointVisible(vtkIdType ptId)
    {return (this->Blanking ? this->PointVisibility->GetValue(ptId) : 1);}
  
  // Description:
  // Return non-zero value if specified point is visible. Use this method 
  // only if blanking has been enabled (with BlankingOn()).
  unsigned char IsCellVisible(vtkIdType cellId);
  
  // Description:
  // Required for the lowest common denominator for setting the UpdateExtent
  // (i.e. vtkDataSetToStructuredPointsFilter).  This assumes that WholeExtent
  // is valid (UpdateInformation has been called).
  void SetUpdateExtent(int piece, int numPieces, int ghostLevel);
  void SetUpdateExtent(int piece, int numPieces)
    {this->SetUpdateExtent(piece, numPieces, 0);}

  // Description:
  // Call superclass method to avoid hiding
  void SetUpdateExtent( int x1, int x2, int y1, int y2, int z1, int z2 )
    { this->vtkPointSet::SetUpdateExtent( x1, x2, y1, y2, z1, z2 ); };
  void SetUpdateExtent( int ext[6] )
    { this->vtkPointSet::SetUpdateExtent( ext ); };

  // Description:
  // Different ways to set the extent of the data array.  The extent
  // should be set before the "Scalars" are set or allocated.
  // The Extent is stored  in the order (X, Y, Z).
  void SetExtent(int extent[6]);
  void SetExtent(int x1, int x2, int y1, int y2, int z1, int z2);
  vtkGetVector6Macro(Extent,int);

  // Description:
  // Return the actual size of the data in kilobytes. This number
  // is valid only after the pipeline has updated. The memory size
  // returned is guaranteed to be greater than or equal to the
  // memory required to represent the data (e.g., extra space in
  // arrays, etc. are not included in the return value). THIS METHOD
  // IS THREAD SAFE.
  unsigned long GetActualMemorySize();

  // Description:
  // Shallow and Deep copy.
  void ShallowCopy(vtkDataObject *src);  
  void DeepCopy(vtkDataObject *src);

protected:
  vtkStructuredGrid();
  ~vtkStructuredGrid();

  // for the GetCell method
  vtkVertex *Vertex;
  vtkLine *Line;
  vtkQuad *Quad;  
  vtkHexahedron *Hexahedron;
  vtkEmptyCell *EmptyCell;

  // The extent type is a 3D extent
  int GetExtentType() { return VTK_3D_EXTENT; }
  
  // Description:
  // Reallocates and copies to set the Extent to the UpdateExtent.
  // This is used internally when the exact extent is requested, 
  // and the source generated more than the update extent. 
  virtual void Crop();

  int Dimensions[3];
  int DataDescription;
  int Blanking;
  vtkUnsignedCharArray *PointVisibility;
  void AllocatePointVisibility();

private:
  // Description:
  // For legacy compatibility. Do not use.
  void GetCellNeighbors(vtkIdType cellId, vtkIdList& ptIds, vtkIdList& cellIds)
    {this->GetCellNeighbors(cellId, &ptIds, &cellIds);}

  // Internal method used by DeepCopy and ShallowCopy.
  void InternalStructuredGridCopy(vtkStructuredGrid *src);

private:
  vtkStructuredGrid(const vtkStructuredGrid&);  // Not implemented.
  void operator=(const vtkStructuredGrid&);  // Not implemented.
};


inline vtkIdType vtkStructuredGrid::GetNumberOfCells() 
{
  int nCells=1;
  int dims[3];
  int i;

  this->GetDimensions(dims);
  for (i=0; i<3; i++)
    {
    if (dims[i] <= 0)
      {
      return 0;
      }
    if (dims[i] > 1)
      {
      nCells *= (dims[i]-1);
      }
    }

  return nCells;
}

inline int vtkStructuredGrid::GetDataDimension()
{
  return vtkStructuredData::GetDataDimension(this->DataDescription);
}

#endif