/*
 *   __               .__       .__  ._____.           
 * _/  |_  _______  __|__| ____ |  | |__\_ |__   ______
 * \   __\/  _ \  \/  /  |/ ___\|  | |  || __ \ /  ___/
 *  |  | (  <_> >    <|  \  \___|  |_|  || \_\ \\___ \ 
 *  |__|  \____/__/\_ \__|\___  >____/__||___  /____  >
 *                   \/       \/             \/     \/ 
 *
 * 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.physics3d.constraints;

import java.util.LinkedList;
import java.util.List;

import toxi.geom.AABB;
import toxi.geom.Vec3D.Axis;
import toxi.physics3d.VerletParticle3D;

/**
 *
 * @author tux
 */
public class SoftBoxConstraint implements ParticleConstraint3D {

    /**
     *
     */
    public AABB box;

    /**
     *
     */
    public List<Axis> axes = new LinkedList<Axis>();

    /**
     *
     */
    public float smooth;

    /**
     *
     * @param box
     * @param smooth
     */
    public SoftBoxConstraint(AABB box, float smooth) {
        this.box = box;
        this.smooth = smooth;
    }

    /**
     *
     * @param a
     * @return
     */
    public SoftBoxConstraint addAxis(Axis a) {
        axes.add(a);
        return this;
    }

    public void apply(VerletParticle3D p) {
        if (p.isInAABB(box)) {
            for (Axis a : axes) {
                float val = p.getComponent(a);
                p.setComponent(a, val + (box.getComponent(a) - val) * smooth);
            }
        }
    }

}