---

Common/vtkConvexPointSet.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkConvexPointSet.h,v $
  Language:  C++

  Copyright (c) 1993-2002 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.

=========================================================================*/
#ifndef __vtkConvexPointSet_h
#define __vtkConvexPointSet_h

#include "vtkCell3D.h"

class vtkUnstructuredGrid;
class vtkCellArray;
class vtkTriangle;
class vtkTetra;
class vtkFloatArray;

class VTK_COMMON_EXPORT vtkConvexPointSet : public vtkCell3D
{
public:
  static vtkConvexPointSet *New();
  vtkTypeRevisionMacro(vtkConvexPointSet,vtkCell3D);


  virtual void GetEdgePoints(int vtkNotUsed(edgeId), int* &vtkNotUsed(pts)) {}
  virtual void GetFacePoints(int vtkNotUsed(faceId), int* &vtkNotUsed(pts)) {}
  virtual float *GetParametricCoords();

  virtual int GetCellType() {return VTK_CONVEX_POINT_SET;}


  virtual int RequiresInitialization() {return 1;}
  virtual void Initialize();


  virtual int GetNumberOfEdges() {return 0;}
  virtual vtkCell *GetEdge(int) {return NULL;}
  virtual int GetNumberOfFaces();
  virtual vtkCell *GetFace(int faceId);


  virtual void Contour(float value, vtkDataArray *cellScalars, 
                       vtkPointLocator *locator, vtkCellArray *verts, 
                       vtkCellArray *lines, vtkCellArray *polys,
                       vtkPointData *inPd, vtkPointData *outPd,
                       vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);


  virtual void Clip(float value, vtkDataArray *cellScalars, 
                    vtkPointLocator *locator, vtkCellArray *connectivity,
                    vtkPointData *inPd, vtkPointData *outPd,
                    vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd, 
                    int insideOut);


  virtual int EvaluatePosition(float x[3], float* closestPoint,
                               int& subId, float pcoords[3],
                               float& dist2, float *weights);


  virtual void EvaluateLocation(int& subId, float pcoords[3], float x[3],
                                float *weights);
  

  virtual int IntersectWithLine(float p1[3], float p2[3], float tol, float& t,
                                float x[3], float pcoords[3], int& subId);

  virtual int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
  

  virtual void Derivatives(int subId, float pcoords[3], float *values, 
                           int dim, float *derivs);

  virtual int CellBoundary(int subId, float pcoords[3], vtkIdList *pts);
  
  virtual int GetParametricCenter(float pcoords[3]);

protected:
  vtkConvexPointSet();
  ~vtkConvexPointSet();

  vtkTetra      *Tetra;
  vtkIdList     *TetraIds;
  vtkPoints     *TetraPoints;
  vtkFloatArray *TetraScalars;

  vtkCellArray  *BoundaryTris;
  vtkTriangle   *Triangle;
  vtkFloatArray *ParametricCoords;

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

inline int vtkConvexPointSet::GetParametricCenter(float pcoords[3])
{
  pcoords[0] = pcoords[1] = pcoords[2] = 0.5;
  return 0;
}

#endif

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