SoCone.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */
 
 
/*
 * Copyright (C) 1990,91   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file defines the SoCone node class.
 |
 |   Author(s)          : Paul S. Strauss, Nick Thompson
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_CONE_
#define  _SO_CONE_
 
#include <Inventor/SbLinear.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFInt32.h>
#include <Inventor/nodes/SoShape.h>
#include <Inventor/misc/SoVBO.h>
 
 
 
 
class INVENTOR_API SoCone : public SoShape {
 
    SO_NODE_HEADER(SoCone);
 
  public:
 
    enum Part {
        SIDES   = 0x01,                 
        BOTTOM  = 0x02,                 
        ALL     = 0x03                  
    };
 
 
 
    SoSFBitMask         parts;          
    SoSFFloat           bottomRadius;   
    SoSFFloat           height;         
 
    SoSFInt32           sides;
 
    SoSFInt32           sections;
 
 
    SoCone();
 
    void                addPart(SoCone::Part part);
    void                removePart(SoCone::Part part);
 
    bool                hasPart(SoCone::Part part) const;
 
  SoEXTENDER public:
    virtual void        GLRender(SoGLRenderAction *action);
    virtual void        rayPick(SoRayPickAction *action);
 
  SoINTERNAL public:
    static void         initClass();
 
  protected:
    virtual void        generatePrimitives(SoAction *action);
 
    virtual void        computeBBox(SoAction *action, SbBox3f &box,
                                    SbVec3f &center);
    virtual ~SoCone();
 
  private:
    static SbVec2f      *coordsArray;   
    static SbVec3f      *normalsArray;  
    static int          maxCoords;      
 
    struct CacheState : public SimpleVertexArrayCache {
      CacheState() {
        curParts = 0;
        numSides = 0;
        numSections = 0;
      }
      int curParts, numSides, numSections;
      SbVec3f scale;
    };
 
    CacheState _cache;
 
    void                computeBase(SoAction *action,
                                    int &numSides, int &numSections,
                                    SbVec2f *&baseCoords,
                                    SbVec3f *&sideNormals) const;
 
    void                getSize(float &rad, float &hHeight) const;
 
    void                GLRenderGeneric(SoGLRenderAction *action,
                                        bool sendNormals, bool doTextures);
    void                GLRenderNvertTnone(SoGLRenderAction *action);
 
 
    void                GLRenderVertexArray(SoGLRenderAction *action,
                                            bool sendNormals, bool doTextures);
 
    bool                intersectInfiniteCone(const SbLine &ray,
                                              SbVec3f &enterPoint,
                                              SbVec3f &exitPoint) const;
};
 
#endif /* _SO_CONE_ */