dox/VolumeRendering/vtkHAVSVolumeMapper.h

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

Program:   Visualization Toolkit
Module:    vtkHAVSVolumeMapper.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.

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

/* Copyright 2005, 2006 by University of Utah. */

#ifndef __vtkHAVSVolumeMapper_h
#define __vtkHAVSVolumeMapper_h

#include "vtkUnstructuredGridVolumeMapper.h"

#define VTK_KBUFFER_SIZE_2 0
#define VTK_KBUFFER_SIZE_6 1
#define VTK_FIELD_LEVEL_OF_DETAIL 0
#define VTK_AREA_LEVEL_OF_DETAIL 1


class vtkUnstructuredGrid;
class vtkDepthRadixSortUnstructuredGrid;
class vtkHAVSSortedFace;

class VTK_VOLUMERENDERING_EXPORT vtkHAVSVolumeMapper : public vtkUnstructuredGridVolumeMapper 
{
public:
  static vtkHAVSVolumeMapper *New();
  vtkTypeMacro(vtkHAVSVolumeMapper,
                       vtkUnstructuredGridVolumeMapper);
  virtual void PrintSelf(ostream& os, vtkIndent indent);


  vtkSetMacro(PartiallyRemoveNonConvexities, bool);
  vtkGetMacro(PartiallyRemoveNonConvexities, bool);


  vtkSetMacro(LevelOfDetailTargetTime, float);
  vtkGetMacro(LevelOfDetailTargetTime, float);


  vtkSetMacro(LevelOfDetail, bool);
  vtkGetMacro(LevelOfDetail, bool);


  void SetLevelOfDetailMethod(int);
  vtkGetMacro(LevelOfDetailMethod, int);
  void SetLevelOfDetailMethodField()
  {this->SetLevelOfDetailMethod(VTK_FIELD_LEVEL_OF_DETAIL);}
  void SetLevelOfDetailMethodArea()
  {this->SetLevelOfDetailMethod(VTK_AREA_LEVEL_OF_DETAIL);}


  vtkSetMacro(KBufferSize,int);
  vtkGetMacro(KBufferSize,int);
  void SetKBufferSizeTo2() 
  {this->SetKBufferSize(VTK_KBUFFER_SIZE_2);}
  void SetKBufferSizeTo6() 
  {this->SetKBufferSize(VTK_KBUFFER_SIZE_6);}


  virtual bool SupportedByHardware(vtkRenderer *vtkNotUsed(r))
    {return false; }


  virtual void SetGPUDataStructures(bool) = 0;
  vtkGetMacro(GPUDataStructures, bool);
  
protected:  
  vtkHAVSVolumeMapper();
  ~vtkHAVSVolumeMapper();

//BTX
  virtual void Initialize(vtkRenderer *ren, vtkVolume *vol) = 0;
  void InitializePrimitives(vtkVolume *vol);
  void InitializeScalars();
  void InitializeLevelOfDetail();
  void InitializeLookupTables(vtkVolume *vol);

  void FRadixSort(vtkHAVSSortedFace *array, vtkHAVSSortedFace *temp, int lo, int up);
  void FRadix(int byte, int len, vtkHAVSSortedFace *source, vtkHAVSSortedFace *dest, int *count);

  void UpdateLevelOfDetail(float targetTime);
  void PartialVisibilitySort(float *eye);
  bool CheckInitializationError();

  enum
  {
    NO_INIT_ERROR=0,
    NON_TETRAHEDRA=1,
    UNSUPPORTED_EXTENSIONS=2,
    NO_SCALARS=3,
    CELL_DATA=4,
    NO_CELLS=5
  };

  // Mesh
  float *Vertices;
  float *Scalars;
  double ScalarRange[2];
  unsigned int *Triangles;
  unsigned int *OrderedTriangles;
  vtkHAVSSortedFace *SortedFaces;
  vtkHAVSSortedFace *RadixTemp;
  float *Centers;
  unsigned int NumberOfVertices;
  unsigned int NumberOfCells;
  unsigned int NumberOfScalars;
  unsigned int NumberOfTriangles;

  // Level-Of-Detail
  unsigned int NumberOfBoundaryTriangles;
  unsigned int NumberOfInternalTriangles;
  unsigned int *BoundaryTriangles;
  unsigned int *InternalTriangles;
  unsigned int LevelOfDetailTriangleCount;
  float CurrentLevelOfDetail;
  float LevelOfDetailTargetTime;
  bool LevelOfDetail;
  int LevelOfDetailMethod;

  // K-Buffer
  int KBufferState;
  float MaxEdgeLength;
  float LevelOfDetailMaxEdgeLength;
  float UnitDistance;
  bool GPUDataStructures;
  float Diagonal;
  bool PartiallyRemoveNonConvexities;
  int KBufferSize;

  // Lookup Tables
  float *TransferFunction;
  int TransferFunctionSize;

  // State and Timing Stats
  bool Initialized;
  int InitializationError;
  int FrameNumber;
  float TotalRenderTime;
  vtkTimeStamp ColorTransferFunctionMTime;
  vtkTimeStamp AlphaTransferFunctionMTime;
  vtkTimeStamp UnstructuredGridMTime;
  vtkTimeStamp ScalarsMTime;
  vtkVolume *LastVolume;
//ETX

private:
  vtkHAVSVolumeMapper(const vtkHAVSVolumeMapper&);  // Not implemented.
  void operator=(const vtkHAVSVolumeMapper&);  // Not implemented.
};
#endif