dox/Filtering/vtkGenericAdaptorCell.h

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

  Program:   Visualization Toolkit
  Module:    vtkGenericAdaptorCell.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.

=========================================================================*/
#ifndef __vtkGenericAdaptorCell_h
#define __vtkGenericAdaptorCell_h


#include "vtkObject.h"

class vtkLine;
class vtkTetra;
class vtkPoints;
class vtkVertex;
class vtkTriangle;
class vtkCellData;
class vtkPointData;
class vtkCellArray;
class vtkDoubleArray;
class vtkGenericCellIterator;
class vtkIncrementalPointLocator;
class vtkContourValues;
class vtkImplicitFunction;
class vtkGenericCellTessellator;
class vtkGenericAttributeCollection;
class vtkGenericAttribute;
class vtkGenericPointIterator;
class vtkIdList;
class vtkOrderedTriangulator;
class vtkPolygon;
class vtkUnsignedCharArray;
class vtkQuad;
class vtkHexahedron;
class vtkWedge;
class vtkPyramid;

class VTK_FILTERING_EXPORT vtkGenericAdaptorCell : public vtkObject
{
public:
  vtkTypeMacro(vtkGenericAdaptorCell,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  virtual vtkIdType GetId() = 0;

  virtual int IsInDataSet()=0;
  
  virtual int GetType()=0;

  virtual int GetDimension() = 0;

  virtual int GetGeometryOrder()=0;
  
  int IsGeometryLinear();
  
  virtual int GetAttributeOrder(vtkGenericAttribute *a)=0;
  
  virtual int GetHighestOrderAttribute(vtkGenericAttributeCollection *ac);
  
  int IsAttributeLinear(vtkGenericAttribute *a);
  
  virtual int IsPrimary()=0;

  virtual int GetNumberOfPoints()=0;

  virtual int GetNumberOfBoundaries(int dim=-1)=0;

  virtual int GetNumberOfDOFNodes()=0;
  
  virtual void GetPointIterator(vtkGenericPointIterator *it)=0;
  
  virtual vtkGenericCellIterator *NewCellIterator()=0;
 

  virtual void GetBoundaryIterator(vtkGenericCellIterator *boundaries,
                                   int dim=-1)=0;
  

  virtual int CountNeighbors(vtkGenericAdaptorCell *boundary)=0;
  virtual void CountEdgeNeighbors( int* sharing ) = 0;


  virtual void GetNeighbors(vtkGenericAdaptorCell *boundary,
                            vtkGenericCellIterator *neighbors)=0;


  virtual int FindClosestBoundary(int subId,
                                  double pcoords[3],
                                  vtkGenericCellIterator* &boundary)=0;


  virtual int EvaluatePosition(double x[3],
                               double *closestPoint, 
                               int &subId,
                               double pcoords[3], 
                               double &dist2)=0;
  

  virtual void EvaluateLocation(int subId,
                                double pcoords[3],
                                double x[3])=0;
  

  virtual void InterpolateTuple(vtkGenericAttribute *a, double pcoords[3],
                                double *val) = 0;


  virtual void InterpolateTuple(vtkGenericAttributeCollection *c,
                                double pcoords[3],
                                double *val) = 0;
  

  virtual void Contour(vtkContourValues *values,
                       vtkImplicitFunction *f,
                       vtkGenericAttributeCollection *attributes,
                       vtkGenericCellTessellator *tess,
                       vtkIncrementalPointLocator *locator,
                       vtkCellArray *verts,
                       vtkCellArray *lines,
                       vtkCellArray *polys,
                       vtkPointData *outPd,
                       vtkCellData *outCd,
                       vtkPointData *internalPd,
                       vtkPointData *secondaryPd,
                       vtkCellData *secondaryCd);


  virtual void Clip(double value, 
                    vtkImplicitFunction *f,
                    vtkGenericAttributeCollection *attributes,
                    vtkGenericCellTessellator *tess,
                    int insideOut,
                    vtkIncrementalPointLocator *locator, 
                    vtkCellArray *connectivity,
                    vtkPointData *outPd,
                    vtkCellData *outCd,
                    vtkPointData *internalPd,
                    vtkPointData *secondaryPd,
                    vtkCellData *secondaryCd);
  

  virtual int IntersectWithLine(double p1[3],
                                double p2[3], 
                                double tol,
                                double &t,
                                double x[3], 
                                double pcoords[3],
                                int &subId)=0;


  virtual void Derivatives(int subId,
                           double pcoords[3],
                           vtkGenericAttribute *attribute,
                           double *derivs)=0;

  virtual void GetBounds(double bounds[6])=0;

  virtual double *GetBounds();

  virtual double GetLength2();

  virtual int GetParametricCenter(double pcoords[3])=0;

  virtual double GetParametricDistance(double pcoords[3])=0;

  virtual double *GetParametricCoords()=0;


  virtual void Tessellate(vtkGenericAttributeCollection *attributes, 
                          vtkGenericCellTessellator *tess,
                          vtkPoints *points,
                          vtkIncrementalPointLocator *locator,
                          vtkCellArray* cellArray,
                          vtkPointData *internalPd,
                          vtkPointData *pd, vtkCellData* cd,
                          vtkUnsignedCharArray *types);

  // The following methods are for the internals of the tesselation algorithm
  // (the hash table in particular)
  
  virtual int IsFaceOnBoundary(vtkIdType faceId) = 0;
  
  virtual int IsOnBoundary() = 0;

  virtual void GetPointIds(vtkIdType *id) = 0;


  virtual void TriangulateFace(vtkGenericAttributeCollection *attributes,
                               vtkGenericCellTessellator *tess, int index, 
                               vtkPoints *points,
                               vtkIncrementalPointLocator *locator,
                               vtkCellArray *cellArray,
                               vtkPointData *internalPd,
                               vtkPointData *pd, vtkCellData *cd );
  
  virtual int *GetFaceArray(int faceId)=0;
  
  virtual int GetNumberOfVerticesOnFace(int faceId)=0;
  
  virtual int *GetEdgeArray(int edgeId)=0;
  
protected:
  vtkGenericAdaptorCell();
  virtual ~vtkGenericAdaptorCell();

  void Reset();
  
  void AllocateTuples(int size);
  
  //Internal tetra used for the contouring/clipping algorithm
  vtkTetra       *Tetra;
  vtkTriangle    *Triangle;
  vtkLine        *Line;
  vtkVertex      *Vertex; //is it used ?
  vtkQuad *Quad;
  vtkHexahedron *Hexa;
  vtkWedge *Wedge;
  vtkPyramid *Pyramid;
  
  // Internal locator when tessellating on a cell basis, this is different
  // from the main locator used in contour/clip filter, this locator is used for
  // points for
  // Be carefull the use of a vtkLocator in conjuction with the table fast
  // tessellator is very sensitive, we need to keep all the points we used
  vtkDoubleArray  *InternalPoints;
  vtkCellArray    *InternalCellArray;
  vtkDoubleArray  *InternalScalars;
  vtkDoubleArray  *PointDataScalars;
  
  vtkIdList        *InternalIds; // used by Tessellate() and TriangulateFace()
  
  //Attributes to mimic the vtk cell look and feel, internal use only
  vtkDoubleArray  *Scalars;
  vtkPointData    *PointData;
  vtkCellData     *CellData;
  
  // Scalar buffer to store the attributes values at some location
  // There are variable members to reduce memory allocations.
  double *Tuples;
  int TuplesCapacity;
  
  // Cached Bounds.
  double Bounds[6];
  
private:
  vtkGenericAdaptorCell(const vtkGenericAdaptorCell&);  // Not implemented.
  void operator=(const vtkGenericAdaptorCell&);  // Not implemented.
};

#endif

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