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Common/vtkCell.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkCell.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 __vtkCell_h
#define __vtkCell_h

#define VTK_CELL_SIZE 512
#define VTK_TOL 1.e-05 // Tolerance for geometric calculation

#include "vtkObject.h"
#include "vtkPoints.h"
#include "vtkIdList.h"

// Include vtkCellType to include the defined cell types
#include "vtkCellType.h"

class vtkCellArray;
class vtkPointLocator;
class vtkPointData;
class vtkCellData;

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

  void Initialize(int npts, vtkIdType *pts, vtkPoints *p);

  virtual vtkCell *MakeObject() = 0;

  virtual void ShallowCopy(vtkCell *c);

  virtual void DeepCopy(vtkCell *c);

  virtual int GetCellType() = 0;

  virtual int GetCellDimension() = 0;

  virtual int GetInterpolationOrder() {return 1;};

  vtkPoints *GetPoints() {return this->Points;};

  int GetNumberOfPoints() {return this->PointIds->GetNumberOfIds();};

  virtual int GetNumberOfEdges() = 0;

  virtual int GetNumberOfFaces() = 0;

  vtkIdList *GetPointIds() {return this->PointIds;};

  vtkIdType GetPointId(int ptId) {return this->PointIds->GetId(ptId);};

  virtual vtkCell *GetEdge(int edgeId) = 0;

  virtual vtkCell *GetFace(int faceId) = 0;

  virtual int CellBoundary(int subId, float pcoords[3], vtkIdList *pts) = 0;


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


  virtual void EvaluateLocation(int& subId, float pcoords[3], 
                                float x[3], float *weights) = 0;


  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) = 0;


  virtual void Clip(float value, vtkDataArray *cellScalars, 
                    vtkPointLocator *locator, vtkCellArray *connectivity,
                    vtkPointData *inPd, vtkPointData *outPd,
                    vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd, 
                    int insideOut) = 0;


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

  virtual int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts) = 0;


  virtual void Derivatives(int subId, float pcoords[3], float *values, 
                           int dim, float *derivs) = 0;


  void GetBounds(float bounds[6]);


  float *GetBounds();


  float GetLength2();


  virtual int GetParametricCenter(float pcoords[3]);



  static char HitBBox(float bounds[6], float origin[3], float dir[3], 
                      float coord[3], float& t);

  
  // left public for quick computational access
  vtkPoints *Points;
  vtkIdList *PointIds;

protected:
  vtkCell();
  ~vtkCell();

  float Bounds[6];
private:
  vtkCell(const vtkCell&);  // Not implemented.
  void operator=(const vtkCell&);  // Not implemented.
};

#endif

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