dox/Rendering/vtkShadowMapPass.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkShadowMapPass.h,v $

  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 "vtkRenderPass.h"

class vtkOpenGLRenderWindow;
class vtkInformationIntegerKey;
class vtkCamera;
class vtkLight;
class vtkFrameBufferObject;
class vtkShadowMapPassTextures; // internal
class vtkShadowMapPassLightCameras; // internal
class vtkShaderProgram2;
class vtkImageGaussianSource;
class vtkImageExport;
class vtkTextureObject;
class vtkImplicitHalo;
class vtkSampleFunction;

class VTK_RENDERING_EXPORT vtkShadowMapPass : public vtkRenderPass
{
public:
  static vtkShadowMapPass *New();
  vtkTypeRevisionMacro(vtkShadowMapPass,vtkRenderPass);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkInformationIntegerKey *OCCLUDER();
  
  // If this key exists on the Propertykeys of a prop, the prop is viewed as a
  // light/shadow receiver. This key is not mutually exclusive with the
  // OCCLUDER() key.
  static vtkInformationIntegerKey *RECEIVER();
  
  virtual void Render(const vtkRenderState *s);
  
  void ReleaseGraphicsResources(vtkWindow *w);
  

  vtkGetObjectMacro(OpaquePass,vtkRenderPass);
  virtual void SetOpaquePass(vtkRenderPass *opaquePass);
  

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

  vtkSetMacro(PolygonOffsetFactor,float);
  vtkGetMacro(PolygonOffsetFactor,float);
  

  vtkSetMacro(PolygonOffsetUnits,float);
  vtkGetMacro(PolygonOffsetUnits,float);
  
 protected:
  vtkShadowMapPass();

  virtual ~vtkShadowMapPass();

  void BuildCameraLight(vtkLight *light, vtkCamera *camera);
  
  void BuildSpotLightIntensityMap();
  
  void CheckSupport(vtkOpenGLRenderWindow *w);
  
  vtkRenderPass *OpaquePass;
  unsigned int Resolution;
  
  float PolygonOffsetFactor;
  float PolygonOffsetUnits;
  
  vtkFrameBufferObject *FrameBufferObject;
  
  vtkShadowMapPassTextures *ShadowMaps;
  vtkShadowMapPassLightCameras *LightCameras;
  vtkShaderProgram2 *Program;
  
  vtkTextureObject *IntensityMap;
  
//  vtkImageGaussianSource *IntensitySource;
  vtkSampleFunction *IntensitySource;
  vtkImageExport *IntensityExporter;
  vtkImplicitHalo *Halo;
  
  vtkTimeStamp LastRenderTime;
  
private:
  vtkShadowMapPass(const vtkShadowMapPass&);  // Not implemented.
  void operator=(const vtkShadowMapPass&);  // Not implemented.
};

#endif

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