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/*
* ShadowVolume.cpp
*
* Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
*
* This program 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 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ShadowVolume.h"
#include "MathUtil.h"
#include "gl.h"
namespace Zoom {
ShadowVolume::ShadowVolume(const Triangle &t, const vmml::vec3f &lightPos) : visible(true) {
MathUtil::Plane trianglePlane(t);
if(!trianglePlane.isBehind(lightPos)) {
visible = false;
return;
}
for(int i = 0; i < 3; ++i) {
rays[i] = MathUtil::Ray(t.getVertex(i), t.getVertex(i) - lightPos);
}
}
}
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