vtkEncodedGradientShader.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkEncodedGradientShader.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 vtkEncodedGradientShader_h
#define vtkEncodedGradientShader_h
 
#include "vtkRenderingVolumeModule.h" // For export macro
#include "vtkObject.h"
 
class vtkVolume;
class vtkRenderer;
class vtkEncodedGradientEstimator;
 
#define VTK_MAX_SHADING_TABLES   100
 
class VTKRENDERINGVOLUME_EXPORT vtkEncodedGradientShader : public vtkObject
{
public:
  static vtkEncodedGradientShader *New();
  vtkTypeMacro(vtkEncodedGradientShader,vtkObject);
 
  void PrintSelf( ostream& os, vtkIndent indent );
 
 
  vtkSetClampMacro( ZeroNormalDiffuseIntensity,  float, 0.0f, 1.0f);
  vtkGetMacro( ZeroNormalDiffuseIntensity, float );
  vtkSetClampMacro( ZeroNormalSpecularIntensity, float, 0.0f, 1.0f);
  vtkGetMacro( ZeroNormalSpecularIntensity, float );
 
 
  void UpdateShadingTable( vtkRenderer *ren, vtkVolume *vol,
                           vtkEncodedGradientEstimator *gradest);
 
 
  float *GetRedDiffuseShadingTable(    vtkVolume *vol );
  float *GetGreenDiffuseShadingTable(  vtkVolume *vol );
  float *GetBlueDiffuseShadingTable(   vtkVolume *vol );
  float *GetRedSpecularShadingTable(   vtkVolume *vol );
  float *GetGreenSpecularShadingTable( vtkVolume *vol );
  float *GetBlueSpecularShadingTable(  vtkVolume *vol );
 
 
  vtkSetClampMacro( ActiveComponent, int, 0, 3 );
  vtkGetMacro( ActiveComponent, int );
 
protected:
  vtkEncodedGradientShader();
  ~vtkEncodedGradientShader();
 
 
  void  BuildShadingTable( int index,
                           double lightDirection[3],
                           double lightAmbientColor[3],
                           double lightDiffuseColor[3],
                           double lightSpecularColor[3],
                           double lightIntensity,
                           double viewDirection[3],
                           double material[4],
                           int twoSided,
                           vtkEncodedGradientEstimator *gradest,
                           int updateFlag );
 
  // The six shading tables (r diffuse ,g diffuse ,b diffuse,
  // r specular, g specular, b specular ) - with an entry for each
  // encoded normal plus one entry at the end for the zero normal
  // There is one shading table per volume listed in the ShadingTableVolume
  // array. A null entry indicates an available slot.
  float                        *ShadingTable[VTK_MAX_SHADING_TABLES][6];
  vtkVolume                    *ShadingTableVolume[VTK_MAX_SHADING_TABLES];
  int                          ShadingTableSize[VTK_MAX_SHADING_TABLES];
 
  int                          ActiveComponent;
 
  // The intensity of light used for the zero normals, since it
  // can not be computed from the normal angles. Defaults to 0.0.
  float    ZeroNormalDiffuseIntensity;
  float    ZeroNormalSpecularIntensity;
private:
  vtkEncodedGradientShader(const vtkEncodedGradientShader&);  // Not implemented.
  void operator=(const vtkEncodedGradientShader&);  // Not implemented.
};
 
 
#endif