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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.collision.bih;
import com.jme3.math.FastMath;
import com.jme3.math.Vector3f;
public final class BIHTriangle {
private final Vector3f pointa = new Vector3f();
private final Vector3f pointb = new Vector3f();
private final Vector3f pointc = new Vector3f();
private final Vector3f center = new Vector3f();
public BIHTriangle(Vector3f p1, Vector3f p2, Vector3f p3) {
pointa.set(p1);
pointb.set(p2);
pointc.set(p3);
center.set(pointa);
center.addLocal(pointb).addLocal(pointc).multLocal(FastMath.ONE_THIRD);
}
public Vector3f get1(){
return pointa;
}
public Vector3f get2(){
return pointb;
}
public Vector3f get3(){
return pointc;
}
public Vector3f getCenter() {
return center;
}
public Vector3f getNormal(){
Vector3f normal = new Vector3f(pointb);
normal.subtractLocal(pointa).crossLocal(pointc.x-pointa.x, pointc.y-pointa.y, pointc.z-pointa.z);
normal.normalizeLocal();
return normal;
}
public float getExtreme(int axis, boolean left){
float v1, v2, v3;
switch (axis){
case 0: v1 = pointa.x; v2 = pointb.x; v3 = pointc.x; break;
case 1: v1 = pointa.y; v2 = pointb.y; v3 = pointc.y; break;
case 2: v1 = pointa.z; v2 = pointb.z; v3 = pointc.z; break;
default: assert false; return 0;
}
if (left){
if (v1 < v2){
if (v1 < v3)
return v1;
else
return v3;
}else{
if (v2 < v3)
return v2;
else
return v3;
}
}else{
if (v1 > v2){
if (v1 > v3)
return v1;
else
return v3;
}else{
if (v2 > v3)
return v2;
else
return v3;
}
}
}
}
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