/*******************************************************************************
* Breakout Cave Survey Visualizer
*
* Copyright (C) 2014 James Edwards
*
* jedwards8 at fastmail dot fm
*
* 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.
*******************************************************************************/
package org.andork.vecmath;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
public class EdgeNormalComputer {
private final Vector3f v1 = new Vector3f();
private final Vector3f v2 = new Vector3f();
private final Vector3f v3 = new Vector3f();
public Vector3f edgeNormal(Point3f e1, Point3f e2, Point3f c1, Point3f c2, Vector3f result) {
v2.sub(e2, e1);
v3.sub(c1, e1);
v1.cross(v2, v3);
v1.normalize();
v3.sub(c2, e1);
v2.cross(v3, v2);
v2.normalize();
result.add(v1, v2);
result.normalize();
return result;
}
}