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

  Program:   Visualization Toolkit
  Module:    vtkDensifyPolyData.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

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

// .NAME vtkDensifyPolyData - Densify the input by adding points at the
// centroid
//
// .SECTION Description
// The filter takes any polygonal data as input and will tessellate cells that 
// are planar polygons present by fanning out triangles from its centroid. 
// Other cells are simply passed through to the output.  PointData, if present,
// is interpolated via linear interpolation. CellData for any tessellated cell
// is simply copied over from its parent cell. Planar polygons are assumed to 
// be convex. Funny things will happen if they are not.
// 
// The number of subdivisions can be controlled by the parameter
// NumberOfSubdivisions.

#ifndef __vtkDensifyPolyData_h
#define __vtkDensifyPolyData_h

#include "vtkPolyDataAlgorithm.h"

class VTK_GRAPHICS_EXPORT vtkDensifyPolyData : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkDensifyPolyData,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);
  static vtkDensifyPolyData *New();

  // Description:
  // Number of recursive subdivisions. Initial value is 1.
  vtkSetMacro( NumberOfSubdivisions, unsigned int );
  vtkGetMacro( NumberOfSubdivisions, unsigned int );

protected:
  vtkDensifyPolyData();
  ~vtkDensifyPolyData();

  virtual int RequestData(vtkInformation *, 
                          vtkInformationVector **, 
                          vtkInformationVector *);

  unsigned int NumberOfSubdivisions;

private:
  virtual int FillInputPortInformation(int, vtkInformation*);
  
  vtkDensifyPolyData(const vtkDensifyPolyData&);  // Not implemented.
  void operator=(const vtkDensifyPolyData&);  // Not implemented.  
};

#endif