vtkViewDependentErrorMetric.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkViewDependentErrorMetric_h
#define vtkViewDependentErrorMetric_h
 
#include "vtkGenericSubdivisionErrorMetric.h"
#include "vtkRenderingCoreModule.h" // For export macro
 
VTK_ABI_NAMESPACE_BEGIN
class vtkViewport;
class vtkCoordinate;
 
class VTKRENDERINGCORE_EXPORT vtkViewDependentErrorMetric : public vtkGenericSubdivisionErrorMetric
{
public:
  static vtkViewDependentErrorMetric* New();


  vtkTypeMacro(vtkViewDependentErrorMetric, vtkGenericSubdivisionErrorMetric);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkGetMacro(PixelTolerance, double);

  void SetPixelTolerance(double value);


  vtkGetObjectMacro(Viewport, vtkViewport);
  void SetViewport(vtkViewport* viewport);

  int RequiresEdgeSubdivision(
    double* leftPoint, double* midPoint, double* rightPoint, double alpha) override;

  double GetError(double* leftPoint, double* midPoint, double* rightPoint, double alpha) override;
 
protected:
  vtkViewDependentErrorMetric();
  ~vtkViewDependentErrorMetric() override;

  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&) = delete;
  void operator=(const vtkViewDependentErrorMetric&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif