From a540d6b16743dad657fd2d6220efea51b56e1f1d Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Fri, 18 Dec 2009 15:06:04 +0100 Subject: ShadowVolume: Well, it's a beginning... --- src/ShadowVolume.cpp | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/ShadowVolume.cpp (limited to 'src/ShadowVolume.cpp') diff --git a/src/ShadowVolume.cpp b/src/ShadowVolume.cpp new file mode 100644 index 0000000..b0c25ca --- /dev/null +++ b/src/ShadowVolume.cpp @@ -0,0 +1,45 @@ +/* + * ShadowVolume.cpp + * + * Copyright (C) 2009 Matthias Schiffer + * + * 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 . + */ + +#include "ShadowVolume.h" +#include "MathUtil.h" + +namespace Zoom { + +ShadowVolume::ShadowVolume(const Triangle &t, const vmml::vec3f &lightPos) { + MathUtil::Plane trianglePlane(t); + + for(int i = 0; i < 3; ++i) { + rays[i].p = t.getVertex(i); + } + + if(trianglePlane.isBehind(lightPos)) { + for(int i = 0; i < 3; ++i) { + rays[i].dir = vmml::vec3f::ZERO; + } + + return; + } + + for(int i = 0; i < 3; ++i) { + rays[i].dir = rays[i].p - lightPos; + } +} + +} -- cgit v1.2.3