Package net.phys2d.raw

Source Code of net.phys2d.raw.Collide

/*
* Phys2D - a 2D physics engine based on the work of Erin Catto. The
* original source remains:
*
* Copyright (c) 2006 Erin Catto http://www.gphysics.com
*
* This source is provided under the terms of the BSD License.
*
* Copyright (c) 2006, Phys2D
* 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 the Phys2D/New Dawn Software 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 net.phys2d.raw;

import net.phys2d.raw.collide.Collider;
import net.phys2d.raw.collide.ColliderFactory;
import net.phys2d.raw.collide.ColliderUnavailableException;

/**
* A static utility for resolve the collision between shapes
*
* TODO: make this nonstatic to allow a user to provide his/her own factory
*
* @author Kevin Glass
*/
public strictfp class Collide {

  /** The factory that provides us with colliders */
  private static ColliderFactory collFactory = new ColliderFactory();

  /**
   * Perform the collision between two bodies
   *
   * @param contacts The points of contact that should be populated
   * @param bodyA The first body
   * @param bodyB The second body
   * @param dt The amount of time that's passed since we last checked collision
   * @return The number of points at which the two bodies contact
   */
  public static int collide(Contact[] contacts, Body bodyA, Body bodyB, float dt)
  {
    Collider collider;
    try {
      collider = collFactory.createCollider(bodyA, bodyB);
    } catch (ColliderUnavailableException e) {
      System.out.println(e.getMessage()
          + "\n Ignoring any possible collision between the bodies in question");
      return 0;
    }
   
    return collider.collide(contacts, bodyA, bodyB);
  }
}
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