vtkShadowMapPass.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkShadowMapPass.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 vtkShadowMapPass_h
#define vtkShadowMapPass_h
 
#include "vtkOpenGLRenderPass.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include <string>                      // For member variables.
#include <vector>                      // STL Header
 
class vtkOpenGLRenderWindow;
class vtkInformationIntegerKey;
class vtkCamera;
class vtkLight;
class vtkFrameBufferObject;
class vtkShadowMapPassTextures;     // internal
class vtkShadowMapPassLightCameras; // internal
class vtkShadowMapBakerPass;
class vtkInformationObjectBaseKey;
class vtkShaderProgram;
 
class VTKRENDERINGOPENGL2_EXPORT vtkShadowMapPass : public vtkOpenGLRenderPass
{
public:
  static vtkShadowMapPass* New();
  vtkTypeMacro(vtkShadowMapPass, vtkOpenGLRenderPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void Render(const vtkRenderState* s) override;
 
  void ReleaseGraphicsResources(vtkWindow* w) override;
 
 
  vtkGetObjectMacro(ShadowMapBakerPass, vtkShadowMapBakerPass);
  virtual void SetShadowMapBakerPass(vtkShadowMapBakerPass* shadowMapBakerPass);
 
 
  vtkGetObjectMacro(OpaqueSequence, vtkRenderPass);
  virtual void SetOpaqueSequence(vtkRenderPass* opaqueSequence);
 
  std::vector<double> ShadowMapTransforms() { return this->ShadowTransforms; }
 
  std::vector<int> GetShadowMapTextureUnits() { return this->ShadowTextureUnits; }
 
  static vtkInformationObjectBaseKey* ShadowMapPass();
 
  std::string GetFragmentDeclaration() { return this->FragmentDeclaration; }
  std::string GetFragmentImplementation() { return this->FragmentImplementation; }
 
  // vtkOpenGLRenderPass virtuals:
  bool PreReplaceShaderValues(std::string& vertexShader, std::string& geometryShader,
    std::string& fragmentShader, vtkAbstractMapper* mapper, vtkProp* prop) override;
  bool PostReplaceShaderValues(std::string& vertexShader, std::string& geometryShader,
    std::string& fragmentShader, vtkAbstractMapper* mapper, vtkProp* prop) override;
  bool SetShaderParameters(vtkShaderProgram* program, vtkAbstractMapper* mapper, vtkProp* prop,
    vtkOpenGLVertexArrayObject* VAO = nullptr) override;
 
protected:
  vtkShadowMapPass();
 
  ~vtkShadowMapPass() override;
 
  void CheckSupport(vtkOpenGLRenderWindow* w);
 
  vtkShadowMapBakerPass* ShadowMapBakerPass;
  vtkRenderPass* CompositeRGBAPass;
 
  vtkRenderPass* OpaqueSequence;
 
  vtkFrameBufferObject* FrameBufferObject;
 
  vtkShadowMapPassTextures* ShadowMaps;
  vtkShadowMapPassLightCameras* LightCameras;
 
  vtkTimeStamp LastRenderTime;
 
  // to store the shader code and settings
  void BuildShaderCode();
  std::string FragmentDeclaration;
  std::string FragmentImplementation;
  std::vector<int> ShadowTextureUnits;
  std::vector<double> ShadowTransforms;
  std::vector<float> ShadowAttenuation;
  std::vector<int> ShadowParallel;
 
private:
  vtkShadowMapPass(const vtkShadowMapPass&) = delete;
  void operator=(const vtkShadowMapPass&) = delete;
};
 
#endif