vtkPanoramicProjectionPass.h

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

#include "vtkImageProcessingPass.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkWrappingHints.h"          // For VTK_MARSHALAUTO

VTK_ABI_NAMESPACE_BEGIN
class vtkOpenGLFramebufferObject;
class vtkOpenGLQuadHelper;
class vtkTextureObject;

class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO vtkPanoramicProjectionPass
  : public vtkImageProcessingPass
{
public:
  static vtkPanoramicProjectionPass* New();
  vtkTypeMacro(vtkPanoramicProjectionPass, vtkImageProcessingPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void Render(const vtkRenderState* s) override;

  void ReleaseGraphicsResources(vtkWindow* w) override;


  vtkGetMacro(CubeResolution, unsigned int);
  vtkSetMacro(CubeResolution, unsigned int);

  enum : int
  {
    Equirectangular = 1, 
    Azimuthal = 2        
  };


  vtkGetMacro(ProjectionType, int);
  vtkSetClampMacro(ProjectionType, int, Equirectangular, Azimuthal);
  void SetProjectionTypeToEquirectangular() { this->SetProjectionType(Equirectangular); }
  void SetProjectionTypeToAzimuthal() { this->SetProjectionType(Azimuthal); }


  vtkGetMacro(Angle, double);
  vtkSetClampMacro(Angle, double, 90.0, 360.0);


  vtkGetMacro(Interpolate, bool);
  vtkSetMacro(Interpolate, bool);
  vtkBooleanMacro(Interpolate, bool);

protected:
  vtkPanoramicProjectionPass() = default;
  ~vtkPanoramicProjectionPass() override = default;

  void RenderOnFace(const vtkRenderState* s, int index);

  void Project(vtkOpenGLRenderWindow* renWin);

  void InitOpenGLResources(vtkOpenGLRenderWindow* renWin);

  vtkOpenGLFramebufferObject* FrameBufferObject = nullptr;
  vtkTextureObject* CubeMapTexture = nullptr;
  vtkOpenGLQuadHelper* QuadHelper = nullptr;

  unsigned int CubeResolution = 300;
  int ProjectionType = Equirectangular;
  double Angle = 180.0;
  bool Interpolate = false;

private:
  vtkPanoramicProjectionPass(const vtkPanoramicProjectionPass&) = delete;
  void operator=(const vtkPanoramicProjectionPass&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif