67 lines
2.8 KiB
C
67 lines
2.8 KiB
C
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/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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****************************************************************************/
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#ifndef VCG_GL_POS_H
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#define VCG_GL_POS_H
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// Please note that this file assume that you have already included your
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// gl-extension wrapping utility, and that therefore all the extension symbol are already defined.
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#include <vcg/simplex/face/pos.h>
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#include <vcg/space/triangle3.h>
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namespace vcg {
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template<class PosType>
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struct GlPos{
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typedef typename PosType::ScalarType S;
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static void Draw(PosType & p){
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Point3<S> bc = Barycenter(*(p.f));
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Point3<S> mid = (p.f->P(p.z)+p.f->P(((p.z+1)%3)))*0.5f;
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Point3<S> up = ((bc- p.v->P()) ^ (mid- p.f->P(p.z) )).Normalize();
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Point3<S> ax = ( up ^ (mid-p.f->P(p.z)) ) .Normalize();
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S proj = (bc-mid)*(ax)*0.5;
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Point3<S> bc1 = mid+ (ax)*proj;
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glBegin(GL_TRIANGLES);
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glVertex(p.v->P());
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if( p.v == p.f->V(p.z))
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{ glVertex(mid); glVertex(bc1);}
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else
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{glVertex(bc1); glVertex(mid);}
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glEnd();
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}
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};
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}//namespace
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#endif
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