SoProfile.h

/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Author      : Thad Beier (MMM yyyy)
** Modified by : Dave Immel (MMM yyyy)
** Modified by : Paul Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_PROFILE_
#define  _SO_PROFILE_
 
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoProfileElement.h>
#include <Inventor/fields/SoMFInt32.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/nodes/SoNode.h>

//
//  Class: SoProfile
//
//  Abstract base class of 2D profiles.  These profiles are used as trim
//  curves for nurbs and bevels for 3D text.  The two (so far) subclasses
//  are SoLinearProfile and SoNurbsProfile
//

class  SoProfile : public SoNode{
 
  SO_NODE_ABSTRACT_HEADER(SoProfile);
 
 public:
  enum Profile {
    START_FIRST    = SoProfileElement::START_FIRST,
    START_NEW      = SoProfileElement::START_NEW,
    ADD_TO_CURRENT = SoProfileElement::ADD_TO_CURRENT
  };
 
  // Fields
  SoMFInt32           index;
  SoSFEnum            linkage;
 
 private:
  // These action methods are implemented for profiles. Each of them
  // just adds the profile to the current state.
  virtual void        doAction(SoAction *action);
  virtual void        callback(SoCallbackAction *action);
  virtual void        GLRender(SoGLRenderAction *action);
  virtual void        getBoundingBox(SoGetBoundingBoxAction *action);
  virtual void        pick(SoPickAction *action);
  virtual void        getPrimitiveCount(SoGetPrimitiveCountAction *action);
 
  // Returns a profile as a trim curve. floatsPerVec will be either 2 or 3 depending
  // on whether the curve is non-rational or rational.
  virtual void        getTrimCurve(SoState *state, int32_t &numPoints,
                                   float *&points, int &floatsPerVec,
                                   int32_t &numKnots, float *&knotVector) = 0;
 
  // Returns vertices approximating the profile
  virtual void        getVertices(SoState *state, int32_t &nVertices,
                                  SbVec2f *&vertices) = 0;
 
 private:
  static void         initClass();
  static void         exitClass();
 
 private:
  SoProfile();
 
  virtual ~SoProfile();
};
 
#endif /* _SO_PROFILE_ */