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plane.cpp

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00001 /* ResidualVM - A 3D game interpreter
00002  *
00003  * ResidualVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the COPYRIGHT
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #include "math/plane.h"
00024 
00025 namespace Math {
00026 
00027 Plane::Plane() : _d(0.0f) {
00028 }
00029 
00030 Plane::Plane(const Math::Vector3d &normal, float d) : _normal(normal), _d(d) {
00031 }
00032 
00033 float Plane::getSignedDistance(const Math::Vector3d &p) const {
00034     return _normal.x() * p.x() + _normal.y() * p.y() + _normal.z() * p.z() + _d;
00035 }
00036 
00037 void Plane::normalize() {
00038     float mag = _normal.getMagnitude();
00039     if (mag > 0.0f) {
00040         _normal /= mag;
00041         _d /= mag;
00042     }
00043 }
00044 
00045 }


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