vtkFrustum.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

#ifndef vtkFrustum_h
#define vtkFrustum_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkImplicitFunction.h"
#include "vtkNew.h" // For vtkNew

VTK_ABI_NAMESPACE_BEGIN
class vtkImplicitBoolean;
class vtkPlane;

class VTKCOMMONDATAMODEL_EXPORT vtkFrustum : public vtkImplicitFunction
{
public:
  static vtkFrustum* New();
  vtkTypeMacro(vtkFrustum, vtkImplicitFunction);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  using vtkImplicitFunction::EvaluateFunction;
  double EvaluateFunction(double x[3]) override;

  using vtkImplicitFunction::EvaluateGradient;
  void EvaluateGradient(double x[3], double g[3]) override;


  vtkGetMacro(NearPlaneDistance, double)
  void SetNearPlaneDistance(double distance);


  vtkGetMacro(HorizontalAngle, double)
  void SetHorizontalAngle(double angleInDegrees);


  vtkGetMacro(VerticalAngle, double)
  void SetVerticalAngle(double angleInDegrees);


  vtkPlane* GetTopPlane() { return this->TopPlane; }
  vtkPlane* GetBottomPlane() { return this->BottomPlane; }
  vtkPlane* GetRightPlane() { return this->RightPlane; }
  vtkPlane* GetLeftPlane() { return this->LeftPlane; }
  vtkPlane* GetNearPlane() { return this->NearPlane; }

protected:
  vtkFrustum();
  ~vtkFrustum() override;

private:
  vtkFrustum(const vtkFrustum&) = delete;
  void operator=(const vtkFrustum&) = delete;


  void CalculateHorizontalPlanesNormal();
  void CalculateVerticalPlanesNormal();

  double NearPlaneDistance = 0.5;
  double VerticalAngle = 30;
  double HorizontalAngle = 30;

  vtkNew<vtkPlane> NearPlane;
  vtkNew<vtkPlane> BottomPlane;
  vtkNew<vtkPlane> TopPlane;
  vtkNew<vtkPlane> RightPlane;
  vtkNew<vtkPlane> LeftPlane;

  vtkNew<vtkImplicitBoolean> BooleanOp;
};

VTK_ABI_NAMESPACE_END
#endif