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first draft of the class the draw a Pos

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ganovelli 2006-12-10 19:59:28 +00:00
parent 812ce8a9b1
commit ebfacd2db3
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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program 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. *
* *
* This program 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/****************************************************************************
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$Log: not supported by cvs2svn $
****************************************************************************/
#ifndef VCG_GL_POS_H
#define VCG_GL_POS_H
// Please note that this file assume that you have already included your
// gl-extension wrapping utility, and that therefore all the extension symbol are already defined.
#include <vcg/simplex/face/pos.h>
#include <vcg/space/triangle3.h>
namespace vcg {
template<class PosType>
struct GlPos{
typedef typename PosType::ScalarType S;
static void Draw(PosType & p){
Point3<S> bc = Barycenter(*(p.f));
Point3<S> mid = (p.f->P(p.z)+p.f->P(((p.z+1)%3)))*0.5f;
Point3<S> up = ((bc- p.v->P()) ^ (mid- p.f->P(p.z) )).Normalize();
Point3<S> ax = ( up ^ (mid-p.f->P(p.z)) ) .Normalize();
S proj = (bc-mid)*(ax)*0.5;
Point3<S> bc1 = mid+ (ax)*proj;
glBegin(GL_TRIANGLES);
glVertex(p.v->P());
if( p.v == p.f->V(p.z))
{ glVertex(mid); glVertex(bc1);}
else
{glVertex(bc1); glVertex(mid);}
glEnd();
}
};
}//namespace
#endif