vcglib: pos.h Source File

00001 /****************************************************************************
00002 * VCGLib                                                            o o     *
00003 * Visual and Computer Graphics Library                            o     o   *
00004 *                                                                _   O  _   *
00005 * Copyright(C) 2004                                                \/)\/    *
00006 * Visual Computing Lab                                            /\/|      *
00007 * ISTI - Italian National Research Council                           |      *
00008 *                                                                    \      *
00009 * All rights reserved.                                                      *
00010 *                                                                           *
00011 * This program is free software; you can redistribute it and/or modify      *   
00012 * it under the terms of the GNU General Public License as published by      *
00013 * the Free Software Foundation; either version 2 of the License, or         *
00014 * (at your option) any later version.                                       *
00015 *                                                                           *
00016 * This program is distributed in the hope that it will be useful,           *
00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
00019 * GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
00020 * for more details.                                                         *
00021 *                                                                           *
00022 ****************************************************************************/
00023 /****************************************************************************
00024   History
00025 
00026 $Log: not supported by cvs2svn $
00027 Revision 1.1  2006/12/10 19:59:28  ganovelli
00028 first draft of the class the draw a Pos
00029 
00030 
00031 
00032 ****************************************************************************/
00033 
00034 #ifndef VCG_GL_POS_H
00035 #define VCG_GL_POS_H
00036 
00037 // Please note that this file assume that you have already included your 
00038 // gl-extension wrapping utility, and that therefore all the extension symbol are already defined.
00039 
00040 #include <vcg/simplex/face/pos.h>
00041 #include <vcg/space/triangle3.h>
00042 
00043 namespace vcg {
00044 
00045         template<class PosType>
00046                 struct GlPos{
00047                         typedef typename PosType::ScalarType S;
00048                         static void Draw(PosType & p){
00049                                 Point3<S> bc = Barycenter(*(p.f));
00050                                 Point3<S> mid = (p.f->P(p.z)+p.f->P(((p.z+1)%3)))*0.5f;
00051                                 Point3<S> up = ((bc- p.v->P()) ^ (mid- p.f->P(p.z) )).Normalize();
00052                                 Point3<S> ax = (  up  ^ (mid-p.f->P(p.z)) ) .Normalize();
00053                                 S proj = (bc-mid)*(ax)*0.5;
00054                                 Point3<S> bc1 =  mid+ (ax)*proj;
00055 
00056                 
00057                                 glBegin(GL_TRIANGLES);
00058                                 glVertex(p.v->P());
00059                                 if( p.v == p.f->V(p.z))
00060                                         { glVertex(mid); glVertex(bc1);} 
00061                                 else
00062                                         {glVertex(bc1); glVertex(mid);}
00063                                 glEnd();
00064                         }
00065                 };
00066                 
00067         template<class VfIteType>
00068                 struct GlVfIterator{
00069                         typedef typename VfIteType::ScalarType S;
00070                         static void Draw(VfIteType & v){
00071                                 Point3<S>       p = v.F()->P(v.I());// anchor
00072                                 Point3<S> c[3];
00073                                 for(int i = 0; i < 3;++i)
00074                                 {
00075                                         c[i] = v.F()->P(i)*0.9 + v.F()->P1(i)*0.05 + v.F()->P2(i)*0.05;
00076                                         if(v.F()->VFp(i) != NULL)
00077                                         {
00078                                                 glBegin(GL_LINES);
00079                                                 glVertex(c[i]);
00080                                                 glVertex( vcg::Barycenter(*(v.F()->VFp(i))));
00081                                                 glEnd();
00082                                         }
00083                                 }
00084                         }
00085                 };
00086 
00087 }//namespace
00088 #endif