Inventor/nodes/SoCSGShape.h

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**=======================================================================*/
/*=======================================================================
** Author      : Thibaut Andrieu (Jan 2011)
**=======================================================================*/

#if !defined _SO_CSG_SHAPE_H_
#define _SO_CSG_SHAPE_H_

#include <Inventor/nodes/SoShape.h>
#include <Inventor/fields/SoSFNode.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/SoPrimitiveVertex.h>
#include <Inventor/threads/SbThreadMutex.h>

class SoFaceSet;
class SoCallbackAction;
class SoTransformation;
class SoCache;
class CachedElement;

namespace GetCacheDeps {
class CachedElementsVector;
}
//@TOBEWRAPPED
class  SoCSGShape : public SoShape
{
  SO_NODE_HEADER( SoCSGShape );

public:

  SoCSGShape();

  enum CsgOperationType
  {
    ADD,
    SUB,  
    INTERSECTION,
    LEFT_ONLY, 
    RIGHT_ONLY,
    NOTHING,
    ALL
  };

  SoSFNode leftOperand;
  
  SoSFNode rightOperand;

  SoSFEnum csgOperation;

  enum CsgStatus
  {
    CSG_NO_ERROR,
    CSG_LIB_NOT_AVAILABLE,
    CSG_ERROR,
  };

  void setMaxAttempt( int maxAttempt );

  static void setRescueOperation( CsgOperationType op );

  CsgStatus getStatus();

private:
  // Implement actions

  virtual void doAction( SoAction *action );

  virtual void callback( SoCallbackAction *action );

  virtual void GLRender( SoGLRenderAction *action );

  virtual void rayPick( SoRayPickAction *action );

  virtual void computeBBox( SoAction *action, SbBox3f &box, SbVec3f &center );

  virtual void computeBBox(SoAction *action, SbXfBox3d &box, SbVec3d &center);

  virtual void getPrimitiveCount( SoGetPrimitiveCountAction *action );

private:

  static void initClass();

  static void exitClass();

private:
  virtual ~SoCSGShape();

  virtual void notify( SoNotList *list );

  virtual void generatePrimitives ( SoAction *action );

private:

  void collapse(const std::vector<SoPrimitiveVertex>& points, float eps, std::vector<SbVec3f*>& indexedPoints, std::vector<SbVec3f>& remainingPoints) const;

  void shake(std::vector<SbVec3f>& points, float shift) const;
  
  SoFaceSet* getShape(SoState* state);

  bool getCacheDependencies(SoAction* action, SoNode* node, GetCacheDeps::CachedElementsVector& elements);

  void updateCache( SoState *state, const GetCacheDeps::CachedElementsVector& dependencies, SoCache*& cache );

  bool isCacheValid( SoState *state, SoCache* cache ) const;

  bool generateTriangles(SoAction* action, SoNode* node, std::vector<SoPrimitiveVertex>& triangles, SoTransformation* transform = NULL );

  void updateResult();

  static void pushTriangleCallback(void* vec, 
                            SoCallbackAction* cb, 
                            const SoPrimitiveVertex* v1, 
                            const SoPrimitiveVertex* v2, 
                            const SoPrimitiveVertex* v3);

  static CsgStatus computeCSG(const std::vector<SoPrimitiveVertex>& trianglesLeft, 
                        const std::vector<SoPrimitiveVertex>& trianglesRight, 
                        const CsgOperationType& operation, 
                        std::vector<SoPrimitiveVertex>& trianglesResult);


  std::vector<SoPrimitiveVertex> m_trianglesLeft;

  std::vector<SoPrimitiveVertex> m_trianglesRight;

  SoCache* m_leftCache;

  SoCache* m_rightCache;

  SoCache* m_resultCache;

  bool m_expressedInWolrdSpace;

  std::vector<SoPrimitiveVertex> m_triangles;

  SoFaceSet* m_shape;

  CsgStatus m_csgStatus;

  mutable SbThreadMutex m_mutex;

  int m_maxAttempt;

  static CsgOperationType s_rescueOp;

};

#endif // _SO_CSG_SHAPE_H_

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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