/*
* __ .__ .__ ._____.
* _/ |_ _______ __|__| ____ | | |__\_ |__ ______
* \ __\/ _ \ \/ / |/ ___\| | | || __ \ / ___/
* | | ( <_> > <| \ \___| |_| || \_\ \\___ \
* |__| \____/__/\_ \__|\___ >____/__||___ /____ >
* \/ \/ \/ \/
*
* Copyright (c) 2006-2011 Karsten Schmidt
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* http://creativecommons.org/licenses/LGPL/2.1/
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
package toxi.physics2d.constraints;
import toxi.geom.Ray2D;
import toxi.geom.Rect;
import toxi.geom.Vec2D;
import toxi.physics2d.VerletParticle2D;
public class RectConstraint implements ParticleConstraint2D {
protected Rect rect;
protected Ray2D intersectRay;
protected boolean isContainer;
public RectConstraint(Rect rect) {
this(rect, false);
}
public RectConstraint(Rect rect, boolean isContainer) {
this.isContainer = isContainer;
setBox(rect);
}
public RectConstraint(Vec2D min, Vec2D max) {
this(new Rect(min, max), false);
}
public void apply(VerletParticle2D p) {
if (isContainer) {
if (!rect.containsPoint(p)) {
p.constrain(rect);
}
} else {
if (rect.containsPoint(p)) {
p.set(rect.intersectsRay(
intersectRay.setDirection(intersectRay.sub(p)), 0,
Float.MAX_VALUE));
}
}
}
public Rect getBox() {
return rect.copy();
}
public void setBox(Rect rect) {
this.rect = rect.copy();
this.intersectRay = new Ray2D(rect.getCentroid(), new Vec2D());
}
}