VolumeViz/nodes/SoUniformGridClipping.h

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**=======================================================================*/
/*=======================================================================
** Author      : Benjamin GRANGE (Aug 2006)
**=======================================================================*/


#ifndef SO_UNIFORM_GRID_CLIPPING
#define SO_UNIFORM_GRID_CLIPPING

#include <Inventor/nodes/SoTexture2.h>
#include <Inventor/fields/SoSFBox3f.h>
#include <Inventor/SbBox.h>
#include <Inventor/STL/vector>
#include <LDM/SoLDMTileID.h>

class SoShaderObject;
class SoShaderProgram;
class SoFragmentShader;
class SoVertexShader;
class SoState;
class SoVolumeData;
class SoROI;
class SoLDMNodeFrontMgrOctree;
class SoCache;

class  SoUniformGridClipping : public SoTexture2 {
  SO_NODE_HEADER(SoUniformGridClipping);

public:
  SoUniformGridClipping();

  SoSFBox3f extent;

  enum Axis {
    X,
    Y,
    Z
  };

  SoSFEnum axis;

  SoSFFloat thickness;

  SoSFBool clipBelow;

  SoSFBool clipAbove;

  SoSFFloat undefinedValue;

  static SbBool isSupported(SoState* state=NULL) ;

  static int getMaxNumberOfUniformGrids(SoState* state=NULL);

#if 1             
#ifndef VolumeViz_EXPORTS
SoDEPRECATED
  SoSFBox3f size;
#else

  SoSFBox3f size;
#endif

#endif 
private:
  virtual void GLRender(SoGLRenderAction *action);
  virtual void getBoundingBox(SoGetBoundingBoxAction *action);
  virtual void doAction(SoAction *action);
  virtual void doActionOnRTT(SoAction *action);
  virtual void rayPick(SoRayPickAction *action);

private:

  SoSFBool revertMode;

  static void initClass() ;
  static void exitClass() ;

  int getTexUnit() { return m_texUnit; }

  //Set needed uniforms (used by SoVolumeShader)
  void setClipmapUniforms(SoGLRenderAction* action, SoShaderProgram* prog, const std::vector<SoUniformGridClipping *> &grids);
  void setPlaneUniforms(SoGLRenderAction* action, SoShaderProgram* prog, const std::vector<SoUniformGridClipping *> &grids);
  void setZScaleUniform(SoGLRenderAction* action, SoShaderProgram* prog, const std::vector<SoUniformGridClipping *> &grids);
  virtual void setClipParamUniforms(SoGLRenderAction* action, SoShaderProgram* prog, const std::vector<SoUniformGridClipping *> &grids);

  // Return true if the box is under the grid's bbox
  virtual SbBool isCulled(const SbBox3f &box);

  const SbBox3i32& cropBBox(SoState* state, SoVolumeData* vd);

  virtual void notify(SoNotList *list);

  virtual void fieldHasChanged( SoField *field ); // override of SoTexture2

  static void setVVizUniform(SoGLRenderAction* action);

  void installTexture( SoGLRenderAction* action );

private:

  virtual ~SoUniformGridClipping();

  SbBox3f getBBox();

private:
  enum IntersectionType
  {
    ALL_OUT,
    ALL_IN,    
    INTERSECT
  };
  //Return height field min/max
  virtual void getMinMax(float &min, float &max);

  bool isCroppedBboxCacheValid(SoState *state);

  template <typename T> void findMinMax(float& min, float& max);

  //Texture unit of the SoUniformGridClipping
  int m_texUnit;

  //Finite plane coords in eye space
  //[0] is the non normalised (in order to know the plane's bounds) x-axis of the plane's frame
  //[1] y-axis
  //[2] z-axis
  //[3] the origin
  SbMatrix m_localModelMat;
  SbMatrix m_localModelView;
  SbVec3f m_planeCoords[4];  
  float m_zScale;

  //Used for culling in SoVolumeRender
  float m_minHeight, m_maxHeight;
  SbBool m_recomputeMinMax;

  SoCache* m_croppedBoxCache;
  SbBox3i32 m_croppedBox;
};

#endif

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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