SoCone.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
** Modified by : Nick Thompson (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_CONE_
#define  _SO_CONE_
 
#include <Inventor/SbVec.h>
#include <Inventor/SbBox.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/nodes/SoShape.h>
 
//
//  Class: SoCone
//
//  Simple cone, aligned with y-axis. Default has apex point at y = 1,
//  bottom radius 1, and height 2, so that the size is -1 to +1 in all
//  3 dimensions. There are two parts to the cone: the sides and the
//  bottom face (in that order).
//
 
SO_PIMPL_PUBLIC_DECLARATION( SoCone );
 
class  SoCone : public SoShape {
 
  SO_NODE_HEADER(SoCone);
  SO_PIMPL_PUBLIC_HEADER( SoCone );
 
 public:
 
  enum Part {
    SIDES   = 0x01,
    BOTTOM  = 0x02,
    ALL     = 0x03
  };
 
  // Fields
  SoSFBitMask         parts;
  SoSFFloat           bottomRadius;
  SoSFFloat           height;
 
  SoCone();
 
  void                addPart(SoCone::Part part);
  void                removePart(SoCone::Part part);
 
  SbBool              hasPart(SoCone::Part part) const;
 
 private:
  // Implements actions
  virtual void        GLRender(SoGLRenderAction *action);
  virtual void        rayPick(SoRayPickAction *action);
  virtual void        getPrimitiveCount(SoGetPrimitiveCountAction *action);
 
  // Computes bounding box of cone
  virtual void        computeBBox(SoAction *action, SbBox3f &box,
                                  SbVec3f &center);
  
 private:
  static void         initClass();
  static void         exitClass();
 
  // Modified on 02-25-00: put from private to SoINTERNAL public for the bevel
  // Computes number of sides and sections to use to represent
  // cone (based on complexity), then computes ring of x,z
  // coordinates around base of cone and stores in baseCoords. It
  // computes and stores normals in sideNormals, too.
  void computeBase( SoState *state,
                    int& numSides,
                    int& numSections,
                    std::vector<SbVec2f>& baseCoords,
                    std::vector<SbVec3f>& sideNormals ) const;
 
  virtual SoChildList* getChildren() const;
 
 private:
  // Generates triangles representing a cone
  virtual void        generatePrimitives(SoAction *action);
 
  virtual ~SoCone();
};
 
#endif /* _SO_CONE_ */