scummvm/math/plane.cpp

/* ResidualVM - A 3D game interpreter
*
* ResidualVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/

#include "math/plane.h"

namespace Math {

Plane::Plane() : _d(0.0f) {
}

Plane::Plane(const Math::Vector3d &normal, float d) : _normal(normal), _d(d) {
}

float Plane::getSignedDistance(const Math::Vector3d &p) const {
	return _normal.x() * p.x() + _normal.y() * p.y() + _normal.z() * p.z() + _d;
}

void Plane::normalize() {
	float mag = _normal.getMagnitude();
	if (mag > 0.0f) {
		_normal /= mag;
		_d /= mag;
	}
}

}