vtkShadowMapBakerPass.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkShadowMapBakerPass.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 vtkShadowMapBakerPass_h
#define vtkShadowMapBakerPass_h
 
#include "vtkOpenGLRenderPass.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkSmartPointer.h"           // for ivars
#include <vector>                      // STL Header
 
class vtkOpenGLRenderWindow;
class vtkInformationIntegerKey;
class vtkCamera;
class vtkLight;
class vtkOpenGLFramebufferObject;
class vtkTextureObject;
 
class VTKRENDERINGOPENGL2_EXPORT vtkShadowMapBakerPass : public vtkOpenGLRenderPass
{
public:
  static vtkShadowMapBakerPass* New();
  vtkTypeMacro(vtkShadowMapBakerPass, vtkOpenGLRenderPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void Render(const vtkRenderState* s) override;
 
  void ReleaseGraphicsResources(vtkWindow* w) override;
 
 
  vtkGetObjectMacro(OpaqueSequence, vtkRenderPass);
  virtual void SetOpaqueSequence(vtkRenderPass* opaqueSequence);
 
 
  vtkGetObjectMacro(CompositeZPass, vtkRenderPass);
  virtual void SetCompositeZPass(vtkRenderPass* compositeZPass);
 
 
  vtkSetMacro(Resolution, unsigned int);
  vtkGetMacro(Resolution, unsigned int);
 
  bool GetHasShadows();
 
  bool LightCreatesShadow(vtkLight* l);
 
  std::vector<vtkSmartPointer<vtkTextureObject>>* GetShadowMaps();
 
  std::vector<vtkSmartPointer<vtkCamera>>* GetLightCameras();
 
  bool GetNeedUpdate();
 
  // // Description:
  // INTERNAL USE ONLY.
  // Internally used by vtkShadowMapBakerPass and vtkShadowMapPass.
  //
  // Set NeedUpate to false. Called by vtkShadowMapPass.
  void SetUpToDate();
 
protected:
  vtkShadowMapBakerPass();
 
  ~vtkShadowMapBakerPass() override;
 
  // vtkOpenGLRenderPass virtuals:
  bool PreReplaceShaderValues(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;
 
  void PointNearFar(
    double* v, double* pt, double* dir, double& mNear, double& mFar, bool initialized);
 
  void BoxNearFar(double* bb, double* pt, double* dir, double& mNear, double& mFar);
 
  void BuildCameraLight(vtkLight* light, double* boundingBox, vtkCamera* lcamera);
 
  void CheckSupport(vtkOpenGLRenderWindow* w);
 
  vtkRenderPass* OpaqueSequence;
 
  vtkRenderPass* CompositeZPass;
 
  unsigned int Resolution;
 
  bool HasShadows;
 
  vtkOpenGLFramebufferObject* FrameBufferObject;
 
  std::vector<vtkSmartPointer<vtkTextureObject>>* ShadowMaps;
  std::vector<vtkSmartPointer<vtkCamera>>* LightCameras;
 
  vtkTimeStamp LastRenderTime;
  bool NeedUpdate;
  size_t CurrentLightIndex;
 
private:
  vtkShadowMapBakerPass(const vtkShadowMapBakerPass&) = delete;
  void operator=(const vtkShadowMapBakerPass&) = delete;
};
 
#endif