Inventor/misc/SbExtrusionGenerator.h

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

#if !defined _SB_EXTRUSION_GENERATOR_H_
#define _SB_EXTRUSION_GENERATOR_H_

#include <Inventor/SbBox.h>
#include <Inventor/SbMatrix.h>
#include <Inventor/nodes/SoCoordinate3.h>

class SoShape;
class SoCallbackAction;
class SoPrimitiveVertex;

//@TOBEWRAPPED
class  SbExtrusionGenerator
{

public:

  static SoShape* createFrom3DPoints ( const std::vector<SbVec3f>& pointsInWorld, 
    SoPath* nodePath, 
    const SbViewVolume& volume, 
    const SbBox3f& bboxInLocal = SbBox3f() );

  static SoShape* createFrom2DPoints ( const std::vector<SbVec2f>& pointsInCam, 
    SoPath* nodePath, 
    const SbViewVolume& volume, 
    const SbBox3f& bboxInLocal = SbBox3f() );

  static SoShape* createFrom2DPoints ( const std::vector<SbVec2f>& pointsInCam, 
    const SbMatrix& localToCam, 
    const SbBox3f& bboxInLocal  = SbBox3f() );

  static SoShape* createFrom2DPoints ( const std::vector<SbVec2f>& pointsInCam, 
    const SbMatrix& camToLocal, 
    float zMin = -1.0f,
    float zMax = 1.0f);

private:

  SbExtrusionGenerator();

  virtual ~SbExtrusionGenerator();

  static void prepareLine( std::vector<SbVec2f>& polyline, std::vector<bool>& isCCW );

  static void removeContiguousDuplicated( std::vector<SbVec2f>& polyline );

  static void insertIntersectingPoints( std::vector<SbVec2f>& polyline );

  static void findSelfIntersection( const std::vector<SbVec2f>& polyline, std::vector<bool>& intersect );

  static bool getIntersection( const SbVec2f& A, const SbVec2f& B, const SbVec2f& A1, const SbVec2f& B1, SbVec2f& intersection );

  static bool isStartCCW( const std::vector<SbVec2f>& polyline );


  static void distanceFromCam(  const SbBox3f& bboxInSomeSpace, 
                                const SbMatrix& someSpaceToCam, 
                                float& zMin, float& zMax );

  static void spaceChangeVector( const std::vector<SbVec3f>& lineInSpace1, 
                              const SbMatrix& space1ToSpace2, 
                              std::vector<SbVec3f>& lineInSpace2);

  static SoShape* generateCylinder( const std::vector<SbVec3f>& nearLine, 
                                        const std::vector<SbVec3f>& farLine,
                                        const std::vector<bool>& isCCW);

  static SoShape* generateCone( const SbVec3f& origin, 
                                const std::vector<SbVec3f>& baseLine,
                                const std::vector<bool>& isCCW);

  static SoShape* generateShape( const std::vector<SbVec3f>& triangles);

  static void tesselate( const std::vector<SbVec3f>& polygon, 
                          std::vector<SbVec3f>& triangles );

  static void makeTrianglesCCW( std::vector<SbVec3f>& triangles, const SbVec3f& viewVector );

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

  class TriangleCBData
  {
  public:
    TriangleCBData( std::vector<SbVec3f>& triangles )
      : m_epsilon(0.0f)
      , m_stopOnDegenerated(true)
      , m_containsDegenerated(false)
      , m_triangles(triangles) 
    {}
    float m_epsilon;
    bool m_stopOnDegenerated;
    bool m_containsDegenerated;
    std::vector<SbVec3f>& m_triangles;
  private:
    // forbid copy and remove C4512 error
    TriangleCBData& operator =(const TriangleCBData&){return *this;}
  };

};


#endif // _SB_EXTRUSION_GENERATOR_H_

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