Bound.java

/*
 * JBox2D - A Java Port of Erin Catto's Box2D
 * 
 * JBox2D homepage: http://jbox2d.sourceforge.net/
 * Box2D homepage: http://www.box2d.org
 * 
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 * 
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */

package org.jbox2d.collision;

//Updated to rev 139 of b2BroadPhase.h

/**
 * Used in BroadPhase
 */
public class Bound {
	public int value;

	public int proxyId;

	public int stabbingCount;

	public Bound() {
		value = 0;
		proxyId = 0;
		stabbingCount = 0;
	}

	public Bound(final Bound b) {
		value = b.value;
		proxyId = b.proxyId;
		stabbingCount = b.stabbingCount;
	}

	public final void set(final Bound b) {
		value = b.value;
		proxyId = b.proxyId;
		stabbingCount = b.stabbingCount;
	}

	public final boolean isLower() {
		return (value & 1) == 0;
	}

	public final boolean isUpper() {
		return (value & 1) == 1;
	}

	/**
	 * swaps the values of this bound with the other bound
	 * @param other bound to swap values with
	 */
	public final void swap(final Bound other) {
		final int value = this.value;
		final int proxyId = this.proxyId;
		final int stabbingCount = this.stabbingCount;
		this.value = other.value;
		this.proxyId = other.proxyId;
		this.stabbingCount = other.stabbingCount;
		other.value = value;
		other.proxyId = proxyId;
		other.stabbingCount = stabbingCount;
	}

	@Override
	public String toString() {
		String ret = "Bound variable:\n";
		ret += "value: " + value + "\n";
		ret += "proxyId: " + proxyId + "\n";
		ret += "stabbing count: " + stabbingCount + "\n";
		return ret;
	}
}