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common/vtkPolyData.h

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

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


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.

=========================================================================*/
#ifndef __vtkPolyData_h
#define __vtkPolyData_h

#include "vtkPointSet.h"
#include "vtkPoints.h"
#include "vtkCellArray.h"
#include "vtkCellTypes.h"
#include "vtkCellLinks.h"

class vtkVertex;
class vtkPolyVertex;
class vtkLine;
class vtkPolyLine;
class vtkTriangle;
class vtkQuad;
class vtkPolygon;
class vtkTriangleStrip;
class vtkEmptyCell;



class VTK_EXPORT vtkPolyData : public vtkPointSet 
{
public:
  static vtkPolyData *New();

  vtkTypeMacro(vtkPolyData,vtkPointSet);
  void PrintSelf(ostream& os, vtkIndent indent);

  vtkDataObject *MakeObject() {return vtkPolyData::New();};

  int GetDataObjectType() {return VTK_POLY_DATA;}

  void CopyStructure(vtkDataSet *ds);

  int GetNumberOfCells();
  vtkCell *GetCell(int cellId);
  void GetCell(int cellId, vtkGenericCell *cell);
  int GetCellType(int cellId);
  void GetCellBounds(int cellId, float bounds[6]);
  void GetCellNeighbors(int cellId, vtkIdList *ptIds, vtkIdList *cellIds);
  
  void CopyCells(vtkPolyData *pd, vtkIdList *idList,
       vtkPointLocator *locator = NULL);
  
  void GetCellPoints(int cellId, vtkIdList *ptIds);

  void GetPointCells(int ptId, vtkIdList *cellIds);

  void ComputeBounds();
  
  void Squeeze();

  int GetMaxCellSize();

  void SetVerts (vtkCellArray* v);

  vtkCellArray *GetVerts();

  void SetLines (vtkCellArray* l);

  vtkCellArray *GetLines();

  void SetPolys (vtkCellArray* p);

  vtkCellArray *GetPolys();
  
  void SetStrips (vtkCellArray* s);

  vtkCellArray *GetStrips();

  int GetNumberOfVerts();
  int GetNumberOfLines();
  int GetNumberOfPolys();
  int GetNumberOfStrips();

  void Allocate(int numCells=1000, int extSize=1000);

  int InsertNextCell(int type, int npts, int *pts);

  int InsertNextCell(int type, vtkIdList *pts);

  void Reset();

  void BuildCells();

  void BuildLinks();

  void DeleteCells();

  void DeleteLinks();
  
  void GetPointCells(int ptId, unsigned short& ncells, int* &cells);

  void GetCellEdgeNeighbors(int cellId, int p1, int p2, vtkIdList *cellIds);

  void GetCellPoints(int cellId, int& npts, int* &pts);

  int IsTriangle(int v1, int v2, int v3);

  int IsEdge(int v1, int v2);

  int IsPointUsedByCell(int ptId, int cellId);

  void ReplaceCell(int cellId, int npts, int *pts);

  void ReplaceCellPoint(int cellId, int oldPtId, int newPtId);
  
  void ReverseCell(int cellId);

  void DeletePoint(int ptId);
  void DeleteCell(int cellId);

  int InsertNextLinkedPoint(float x[3], int numLinks); 
  
  int InsertNextLinkedCell(int type, int npts, int *pts); 

  void ReplaceLinkedCell(int cellId, int npts, int *pts);

  void RemoveCellReference(int cellId);

  void AddCellReference(int cellId);

  void RemoveReferenceToCell(int ptId, int cellId);

  void AddReferenceToCell(int ptId, int cellId);

  void ResizeCellList(int ptId, int size);

  virtual void Initialize();

  void SetUpdateExtent(int piece, int numPieces, int ghostLevel);
  void SetUpdateExtent(int piece, int numPieces)
    {this->SetUpdateExtent(piece, numPieces, 0);}
  void GetUpdateExtent(int &piece, int &numPieces, int &ghostLevel);

  vtkGetVector6Macro( UpdateExtent, int );

  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 ); };

  vtkGetMacro( Piece, int );
  vtkGetMacro( NumberOfPieces, int );

  vtkGetMacro( GhostLevel, int );
  
  unsigned long GetActualMemorySize();
  
  void ShallowCopy(vtkDataObject *src);  
  void DeepCopy(vtkDataObject *src);

#ifndef VTK_REMOVE_LEGACY_CODE

  void GetCellPoints(int cellId, vtkIdList &ptIds)
    {VTK_LEGACY_METHOD(GetCellPoints,"3.2"); this->GetCellPoints(cellId, &ptIds);}
  void GetPointCells(int ptId, vtkIdList &cellIds)
    {VTK_LEGACY_METHOD(GetPointCells,"3.2"); this->GetPointCells(ptId, &cellIds);}
  int InsertNextCell(int type, vtkIdList &pts) 
    {VTK_LEGACY_METHOD(InsertNextCell,"3.2"); return this->InsertNextCell(type, &pts);}
  void GetCellEdgeNeighbors(int cellId, int p1, int p2, vtkIdList& cellIds)
    {VTK_LEGACY_METHOD(GetCellEdgeNeighbors,"3.2"); this->GetCellEdgeNeighbors(cellId, p1, p2, &cellIds);}
#endif
  
protected:
  vtkPolyData();
  ~vtkPolyData();
  vtkPolyData(const vtkPolyData&) {};
  void operator=(const vtkPolyData&) {};

  // constant cell objects returned by GetCell called.
  vtkVertex *Vertex;
  vtkPolyVertex *PolyVertex;
  vtkLine *Line;
  vtkPolyLine *PolyLine;
  vtkTriangle *Triangle;
  vtkQuad *Quad;
  vtkPolygon *Polygon;
  vtkTriangleStrip *TriangleStrip;
  vtkEmptyCell *EmptyCell;
  
  // points inherited
  // point data (i.e., scalars, vectors, normals, tcoords) inherited
  vtkCellArray *Verts;
  vtkCellArray *Lines;
  vtkCellArray *Polys;
  vtkCellArray *Strips;

  // dummy static member below used as a trick to simplify traversal
  static vtkCellArray *Dummy;

  // supporting structures for more complex topological operations
  // built only when necessary
  vtkCellTypes *Cells;
  vtkCellLinks *Links;

private:
  // Hide these from the user and the compiler.
  
  void GetCellNeighbors(int cellId, vtkIdList& ptIds, vtkIdList& cellIds)
    {this->GetCellNeighbors(cellId, &ptIds, &cellIds);}

};

inline void vtkPolyData::GetPointCells(int ptId, unsigned short& ncells, 
                                      int* &cells)
{
  ncells = this->Links->GetNcells(ptId);
  cells = this->Links->GetCells(ptId);
}

inline int vtkPolyData::IsTriangle(int v1, int v2, int v3)
{
  unsigned short int n1;
  int i, j, n2, *cells, tVerts[3], *tVerts2;

  tVerts[0] = v1;
  tVerts[1] = v2;
  tVerts[2] = v3;

  for (i=0; i<3; i++) 
    {
    this->GetPointCells(tVerts[i], n1, cells);
    for (j=0; j<n1; j++) 
      {
      this->GetCellPoints(cells[j], n2, tVerts2);
      if ( (tVerts[0] == tVerts2[0] || tVerts[0] == tVerts2[1] ||
       tVerts[0] == tVerts2[2]) &&
      (tVerts[1] == tVerts2[0] || tVerts[1] == tVerts2[1] ||
       tVerts[1] == tVerts2[2]) &&
      (tVerts[2] == tVerts2[0] || tVerts[2] == tVerts2[1] ||
       tVerts[2] == tVerts2[2]) )
   {
        return 1;
   }
      }
    }
  return 0;
}

inline int vtkPolyData::IsPointUsedByCell(int ptId, int cellId)
{
  int npts, *pts;
  this->GetCellPoints(cellId, npts, pts);
  for (int i=0; i < npts; i++)
    {
    if ( pts[i] == ptId )
      {
      return 1;
      }
    }

  return 0;
}

inline int vtkPolyData::IsEdge(int p1, int p2)
{
  unsigned short int ncells;
  int i, *cells;

  this->GetPointCells(p1,ncells,cells);
  for (i=0; i < ncells; i++)
    {
    if ( this->IsPointUsedByCell(p2,cells[i]) )
      {
      return 1;
      }
    }

  return 0;
}

inline void vtkPolyData::DeletePoint(int ptId)
{
  this->Links->DeletePoint(ptId);
}

inline void vtkPolyData::DeleteCell(int cellId)
{
  this->Cells->DeleteCell(cellId);
}

inline void vtkPolyData::RemoveCellReference(int cellId)
{
  int npts, *pts;
  this->GetCellPoints(cellId, npts, pts);
  for (int i=0; i<npts; i++)
    {
    this->Links->RemoveCellReference(cellId, pts[i]);
    }
}

inline void vtkPolyData::AddCellReference(int cellId)
{
  int npts, *pts;
  this->GetCellPoints(cellId, npts, pts);
  for (int i=0; i<npts; i++)
    {
    this->Links->AddCellReference(cellId, pts[i]);
    }
}

inline void vtkPolyData::ResizeCellList(int ptId, int size)
{
  this->Links->ResizeCellList(ptId,size);
}

inline void vtkPolyData::ReplaceCellPoint(int cellId, int oldPtId, int newPtId)
{
  int nverts, *verts, i;

  this->GetCellPoints(cellId,nverts,verts);
  for ( i=0; i < nverts; i++ )
    {
    if ( verts[i] == oldPtId ) 
      {
      verts[i] = newPtId; // this is very nasty! direct write!
      return;
      }
    }
}

#endif

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