vtkGenericCellTessellator.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkGenericCellTessellator.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 vtkGenericCellTessellator_h
#define vtkGenericCellTessellator_h
 
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
 
class vtkCellArray;
class vtkDoubleArray;
class vtkCollection;
class vtkGenericAttributeCollection;
class vtkGenericAdaptorCell;
class vtkGenericCellIterator;
class vtkPointData;
class vtkGenericDataSet;
 
//-----------------------------------------------------------------------------
//
// The tessellation object
class VTKCOMMONDATAMODEL_EXPORT vtkGenericCellTessellator : public vtkObject
{
public:
  vtkTypeMacro(vtkGenericCellTessellator, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  virtual void TessellateFace(vtkGenericAdaptorCell* cell, vtkGenericAttributeCollection* att,
    vtkIdType index, vtkDoubleArray* points, vtkCellArray* cellArray, vtkPointData* internalPd) = 0;
 
  virtual void Tessellate(vtkGenericAdaptorCell* cell, vtkGenericAttributeCollection* att,
    vtkDoubleArray* points, vtkCellArray* cellArray, vtkPointData* internalPd) = 0;
 
  virtual void Triangulate(vtkGenericAdaptorCell* cell, vtkGenericAttributeCollection* att,
    vtkDoubleArray* points, vtkCellArray* cellArray, vtkPointData* internalPd) = 0;
 
 
  virtual void SetErrorMetrics(vtkCollection* someErrorMetrics);
  vtkGetObjectMacro(ErrorMetrics, vtkCollection);
 
  virtual void Initialize(vtkGenericDataSet* ds) = 0;
 
  void InitErrorMetrics(vtkGenericDataSet* ds);
 
 
  vtkGetMacro(Measurement, int);
  vtkSetMacro(Measurement, int);
 
  void GetMaxErrors(double* errors);
 
protected:
  vtkGenericCellTessellator();
  ~vtkGenericCellTessellator() override;
 
  int RequiresEdgeSubdivision(double* left, double* mid, double* right, double alpha);
 
  virtual void UpdateMaxError(
    double* leftPoint, double* midPoint, double* rightPoint, double alpha);
 
  void ResetMaxErrors();
 
  vtkCollection* ErrorMetrics;
 
  void SetGenericCell(vtkGenericAdaptorCell* cell);
 
  vtkGenericDataSet* DataSet;
 
  int Measurement;   // if true, measure the quality of the fixed subdivision.
  double* MaxErrors; // max error for each error metric, for measuring the
  // quality of a fixed subdivision.
  int MaxErrorsCapacity;
 
private:
  vtkGenericCellTessellator(const vtkGenericCellTessellator&) = delete;
  void operator=(const vtkGenericCellTessellator&) = delete;
};
 
#endif