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

  /**
   *
   */
  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;
  }

  @Override
  public void apply(VerletParticle3D p) {
    if (p.isInAABB(box)) {
      axes.forEach((a) -> {
        float val = p.getComponent(a);
        p.setComponent(a, val + (box.getComponent(a) - val) * smooth);
      });
    }
  }

}