Sphere.h

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//    Copyright 2004-2019, SenseGraphics AB
//
//    This file is part of H3D API.
//
//    H3D API is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    H3D API 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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with H3D API; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    A commercial license is also available. Please contact us at 
//    www.sensegraphics.com for more information.
//
//
//
#ifndef __SPHERE_H__
#define __SPHERE_H__
 
#include <H3D/X3DGeometryNode.h>
#include <H3D/SFFloat.h>
 
namespace H3D {
 
  class H3DAPI_API Sphere : public X3DGeometryNode {
  public:
    
    class SFBound: public TypedField< X3DGeometryNode::SFBound,
                                      SFFloat >{
      virtual void update() {
        H3DFloat d = 2 * static_cast< SFFloat * >( routes_in[0] )->getValue();
        BoxBound *bb = new BoxBound;
        bb->size->setValue( Vec3f( d, d, d ) );
        value = bb;
      }
    };
 
    Sphere( Inst<    SFNode >  _metadata = 0,
            Inst< SFBound >                 _bound = 0,
            Inst< SFFloat>  _radius   = 0,
            Inst< SFBool >  _solid    = 0 );
 
    virtual int nrTriangles() {
      return 2500;//50 * 25 * 2;
    }
 
    virtual H3DShadowObjectNode *getShadowObject();
 
    virtual void render();
 
    virtual void traverseSG( TraverseInfo &ti );
 
    virtual bool lineIntersect( 
      const Vec3f &from,
      const Vec3f &to,    
      LineIntersectResult &result );
 
    virtual void closestPoint( const Vec3f &p,
                               NodeIntersectResult &result );
 
    virtual bool movingSphereIntersect( H3DFloat radius,
                                        const Vec3f &from, 
                                        const Vec3f &to,
                                        NodeIntersectResult &result );
 
    H3DUniquePtr< SFFloat >  radius;
 
    H3DUniquePtr< SFBool  >  solid;
 
    static H3DNodeDatabase database;
 
  protected:
    // Internal variable used to store id for Sphere vbo.
    // glDeleteBuffersARB is never called for the allocated buffer. The reason
    // for this is that it is impossible to know when the OpenGL context is
    // destroyed and glDeleteBuffersARB should be called before that occurrs.
    // It is therefore assumed that the memory is cleaned up when the OpenGL
    // context is removed.
    static GLuint vbo_id[2];
    // Internal variable used to indicate if vbo_id contains valid ids.
    // Can not use -1 because vbo_id is an GLuint.
    static bool vbo_initialized;
 
    static vector< GLfloat > sphere_data;
    static vector< GLuint > sphere_index_data;
  };
}
 
#endif