SoNurbsGroup.h

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**=======================================================================*/
/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/
#ifndef  _SO_NURBS_GROUP_
#define  _SO_NURBS_GROUP_
 
#include <Inventor/nodes/SoGroup.h>
#include <Inventor/nodes/SoNurbsProperty.h>
#include <Inventor/elements/SoNurbsPropertyElement.h>
#include <Inventor/STL/vector>
 
class SoCache;
class SoState;
class SoNurbsBREPAction;
class SoBrep;
 
#ifndef HIDDEN_FROM_DOC 
namespace A3DPhigsCrackFreeTess
{
  class Pid_polyline_data;
  class Pid_quad_data;
}
class SoTrimList;
 
#endif
class  SoNurbsGroup : public SoGroup {
  
  SO_NODE_HEADER(SoNurbsGroup);
  
 public:
 
  SoNurbsGroup();
  virtual ~SoNurbsGroup();
 
  private:
    virtual void GLRender(SoGLRenderAction *action);
    virtual void rayPick(SoRayPickAction *action);
    virtual void callback(SoCallbackAction *action);
 
  private:
#ifndef HIDDEN_FROM_DOC 
    static void initClass();
    static void exitClass();
 
    struct NurbsProperty {
      SoNurbsPropertyElement::DrawStyle style;
      int numSamplePoints;
      SoNurbsProperty::TessellationType tessType;
      float tessAngle;
      float tessDistance;
      int steps;
    };
#endif
 
 private:
  SoNurbsBREPAction *m_brepAction;
 
  void deleteBrepStruct(SoBrep *brep);
  void deleteTessData();
  void dispatchData();
  void fillCache(SoAction *action, SbBool renderAction);
  void computeBREP(SoState *state, SoBrep *brep,
                   SoNurbsProperty::TessellationType tessType,
                   float tessAngle, float tessDistance);
 
  SoCache *cache;
  void createGroupCache(SoState *state);
 
  size_t m_numPolygons;
  std::vector<SoTrimList*> m_polygons;
  class A3DPhigsCrackFreeTess::Pid_polyline_data *m_loops;
  class A3DPhigsCrackFreeTess::Pid_polyline_data *m_isoParam;
};
 
#endif /* _SO_NURBS_GROUP_ */