vtkViewDependentErrorMetric.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkViewDependentErrorMetric.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 vtkViewDependentErrorMetric_h
#define vtkViewDependentErrorMetric_h
 
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkGenericSubdivisionErrorMetric.h"
 
class vtkViewport;
class vtkCoordinate;
 
class VTKRENDERINGCORE_EXPORT vtkViewDependentErrorMetric : public vtkGenericSubdivisionErrorMetric
{
public:
  static vtkViewDependentErrorMetric *New();
 
 
  vtkTypeMacro(vtkViewDependentErrorMetric,vtkGenericSubdivisionErrorMetric);
  void PrintSelf(ostream& os, vtkIndent indent);
 
 
  vtkGetMacro(PixelTolerance, double);
 
  void SetPixelTolerance(double value);
 
 
  vtkGetObjectMacro(Viewport,vtkViewport);
  void SetViewport(vtkViewport *viewport);
 
 
  int RequiresEdgeSubdivision(double *leftPoint, double *midPoint, double *rightPoint,
                              double alpha);
 
 
  double GetError(double *leftPoint, double *midPoint,
                  double *rightPoint, double alpha);
 
protected:
  vtkViewDependentErrorMetric();
  ~vtkViewDependentErrorMetric();
 
 
  double Distance2LinePoint(double x[2],
                            double y[2],
                            double z[2]);
 
  double PixelTolerance;
  vtkViewport *Viewport;
  // used to get display coordinates from world coordinates
  vtkCoordinate *Coordinate;
 
private:
  vtkViewDependentErrorMetric(const vtkViewDependentErrorMetric&);  // Not implemented.
  void operator=(const vtkViewDependentErrorMetric&);  // Not implemented.
};
 
#endif