Chain.java

/*******************************************************************************
 * Copyright (c) 2011, Daniel Murphy
 * 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 <organization> 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 DANIEL MURPHY 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.
 ******************************************************************************/
/**
 * Created at 5:30:15 AM Jan 14, 2011
 */
package org.jbox2d.gwt.showcase.client.example;

import org.jbox2d.collision.shapes.PolygonShape;
import org.jbox2d.common.Vec2;
import org.jbox2d.dynamics.Body;
import org.jbox2d.dynamics.BodyDef;
import org.jbox2d.dynamics.BodyType;
import org.jbox2d.dynamics.FixtureDef;
import org.jbox2d.dynamics.joints.RevoluteJointDef;
import org.jbox2d.gwt.showcase.client.framework.BaseExample;

/**
 * @author Daniel Murphy
 */
public class Chain extends BaseExample {
	
	/**
	 * @see org.jbox2d.testbed.framework.TestbedTest#initTest()
	 */
	@Override
	public void initTest() {
		Body ground = null;
		{
			BodyDef bd = new BodyDef();
			ground = m_world.createBody(bd);

			PolygonShape shape = new PolygonShape();
			shape.setAsEdge(new Vec2(-40.0f, 0.0f), new Vec2(40.0f, 0.0f));
			ground.createFixture(shape, 0.0f);
		}

		{
			PolygonShape shape = new PolygonShape();
			shape.setAsBox(0.6f, 0.125f);

			FixtureDef fd = new FixtureDef();
			fd.shape = shape;
			fd.density = 20.0f;
			fd.friction = 0.2f;

			RevoluteJointDef jd = new RevoluteJointDef();
			jd.collideConnected = false;

			final float y = 25.0f;
			Body prevBody = ground;
			for (int i = 0; i < 30; ++i)
			{
				BodyDef bd = new BodyDef();
				bd.type = BodyType.DYNAMIC;
				bd.position.set(0.5f + i, y);
				Body body = m_world.createBody(bd);
				body.createFixture(fd);

				Vec2 anchor = new Vec2(i, y);
				jd.initialize(prevBody, body, anchor);
				m_world.createJoint(jd);

				prevBody = body;
			}
		}
	}
	
	/**
	 * @see org.jbox2d.testbed.framework.TestbedTest#getTestName()
	 */
	@Override
	public String getTestName() {
		return "Chain";
	}
	
}