libvtk6-dev 6.3.0+dfsg1-11build1 / usr / include / vtk-6.3 / vtkVolumeTextureMapper2D.h

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

  Program:   Visualization Toolkit
  Module:    vtkVolumeTextureMapper2D.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.

=========================================================================*/
// .NAME vtkVolumeTextureMapper2D - Abstract class for a volume mapper

// .SECTION Description
// vtkVolumeTextureMapper2D renders a volume using 2D texture mapping.


// .SECTION see also
// vtkVolumeMapper

#ifndef vtkVolumeTextureMapper2D_h
#define vtkVolumeTextureMapper2D_h

#include "vtkRenderingVolumeModule.h" // For export macro
#include "vtkVolumeTextureMapper.h"

class VTKRENDERINGVOLUME_EXPORT vtkVolumeTextureMapper2D : public vtkVolumeTextureMapper
{
public:
  vtkTypeMacro(vtkVolumeTextureMapper2D,vtkVolumeTextureMapper);
  void PrintSelf( ostream& os, vtkIndent indent );

  static vtkVolumeTextureMapper2D *New();

  // Description:
  // Target size in pixels of each size of the texture for downloading. Default is
  // 512x512 - so a 512x512 texture will be tiled with as many slices of the volume
  // as possible, then all the quads will be rendered. This can be set to optimize
  // for a particular architecture. This must be set with numbers that are a power
  // of two.
  vtkSetVector2Macro( TargetTextureSize, int );
  vtkGetVector2Macro( TargetTextureSize, int );

  // Description:
  // This is the maximum number of planes that will be created for texture mapping
  // the volume. If the volume has more voxels than this along the viewing direction,
  // then planes of the volume will be skipped to ensure that this maximum is not
  // violated. A skip factor is used, and is incremented until the maximum condition
  // is satisfied.
  vtkSetMacro( MaximumNumberOfPlanes, int );
  vtkGetMacro( MaximumNumberOfPlanes, int );

  // Description:
  // This is the maximum size of saved textures in bytes. If this size is large
  // enough to hold the RGBA textures for all three directions (XxYxZx3x4 is
  // the approximate value - it is actually a bit larger due to wasted space in
  // the textures) then the textures will be saved.
  vtkSetMacro( MaximumStorageSize, int );
  vtkGetMacro( MaximumStorageSize, int );

//BTX

  // Description:
  // WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
  // DO NOT USE THIS METHOD OUTSIDE OF THE RENDERING PROCESS
  // Render the volume
  virtual void Render(vtkRenderer *, vtkVolume *) {}

  virtual void RenderQuads( int vtkNotUsed(count),
                            float *vtkNotUsed(v), float *vtkNotUsed(t),
                            unsigned char *vtkNotUsed(texture),
                            int vtkNotUsed(size)[2],
                            int vtkNotUsed(reverseFlag)) {}

  // Description:
  // Made public only for access from the templated method. Not a vtkGetMacro
  // to avoid the PrintSelf defect.
  int GetInternalSkipFactor() {return this->InternalSkipFactor;};

  int *GetAxisTextureSize() {return &(this->AxisTextureSize[0][0]);};

  int GetSaveTextures() {return this->SaveTextures;};

  unsigned char *GetTexture() {return this->Texture;};

//ETX


protected:
  vtkVolumeTextureMapper2D();
  ~vtkVolumeTextureMapper2D();

  void InitializeRender( vtkRenderer *ren, vtkVolume *vol )
    {this->InitializeRender( ren, vol, -1 );}

  void InitializeRender( vtkRenderer *ren, vtkVolume *vol, int majorDirection );

  void GenerateTexturesAndRenderQuads( vtkRenderer *ren, vtkVolume *vol );

  int  MajorDirection;
  int  TargetTextureSize[2];

  int  MaximumNumberOfPlanes;
  int  InternalSkipFactor;
  int  MaximumStorageSize;

  unsigned char  *Texture;
  int             TextureSize;
  int             SaveTextures;
  vtkTimeStamp    TextureMTime;

  int             AxisTextureSize[3][3];
  void            ComputeAxisTextureSize( int axis, int *size );

  void           RenderSavedTexture();

private:
  vtkVolumeTextureMapper2D(const vtkVolumeTextureMapper2D&);  // Not implemented.
  void operator=(const vtkVolumeTextureMapper2D&);  // Not implemented.
};


#endif

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