CompoundShapesTest.java

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 * Copyright (c) 2011, Daniel Murphy
 * All rights reserved.
 * 
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 * 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.
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 *       documentation and/or other materials provided with the distribution.
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 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
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 * 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
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/**
 * Created at 1:13:43 AM Sep 3, 2010
 */
package org.jbox2d.gwt.showcase.client.example;

import org.jbox2d.collision.shapes.CircleShape;
import org.jbox2d.collision.shapes.PolygonShape;
import org.jbox2d.common.Mat22;
import org.jbox2d.common.MathUtils;
import org.jbox2d.common.Transform;
import org.jbox2d.common.Vec2;
import org.jbox2d.dynamics.Body;
import org.jbox2d.dynamics.BodyDef;
import org.jbox2d.dynamics.BodyType;
import org.jbox2d.gwt.showcase.client.framework.BaseExample;

/**
 * @author Daniel Murphy
 */
public class CompoundShapesTest extends BaseExample{

	/**
	 * @see org.jbox2d.testbed.framework.TestbedTest#initTest()
	 */
	@Override
	public void initTest() {
		{
			BodyDef bd = new BodyDef();
			bd.position.set(0.0f, 0.0f);
			Body body = m_world.createBody(bd);

			PolygonShape shape = new PolygonShape();
			shape.setAsEdge( new Vec2(50.0f, 0.0f), new Vec2(-50.0f, 0.0f));

			body.createFixture(shape, 0.0f);
		}

		{
			CircleShape circle1 = new CircleShape();
			circle1.m_radius = 0.5f;
			circle1.m_p.set(-0.5f, 0.5f);

			CircleShape circle2 = new CircleShape();;
			circle2.m_radius = 0.5f;
			circle2.m_p.set(0.5f, 0.5f);

			for (int i = 0; i < 10; ++i)
			{
				float x = MathUtils.randomFloat(-0.1f, 0.1f);
				BodyDef bd = new BodyDef();
				bd.type = BodyType.DYNAMIC;
				bd.position.set(x + 5.0f, 1.05f + 2.5f * i);
				bd.angle = MathUtils.randomFloat(-MathUtils.PI, MathUtils.PI);
				Body body = m_world.createBody(bd);
				body.createFixture(circle1, 2.0f);
				body.createFixture(circle2, 0.0f);
			}
		}

		{
			PolygonShape polygon1 = new PolygonShape();
			polygon1.setAsBox(0.25f, 0.5f);

			PolygonShape polygon2 = new PolygonShape();
			polygon2.setAsBox(0.25f, 0.5f, new Vec2(0.0f, -0.5f), 0.5f * MathUtils.PI);

			for (int i = 0; i < 10; ++i)
			{
				float x = MathUtils.randomFloat(-0.1f, 0.1f);
				BodyDef bd = new BodyDef();
				bd.type = BodyType.DYNAMIC;
				bd.position.set(x - 5.0f, 1.05f + 2.5f * i);
				bd.angle = MathUtils.randomFloat(-MathUtils.PI, MathUtils.PI);
				Body body = m_world.createBody(bd);
				body.createFixture(polygon1, 2.0f);
				body.createFixture(polygon2, 2.0f);
			}
		}

		{
			Transform xf1 = new Transform();
			xf1.R.set(0.3524f * MathUtils.PI);
			xf1.position.set(Mat22.mul(xf1.R, new Vec2(1.0f, 0.0f)));

			Vec2[] vertices = new Vec2[3];

			PolygonShape triangle1 = new PolygonShape();
			vertices[0] = Transform.mul(xf1, new Vec2(-1.0f, 0.0f));
			vertices[1] = Transform.mul(xf1, new Vec2(1.0f, 0.0f));
			vertices[2] = Transform.mul(xf1, new Vec2(0.0f, 0.5f));
			triangle1.set(vertices, 3);

			Transform xf2 = new Transform();
			xf2.R.set(-0.3524f * MathUtils.PI);
			xf2.position.set(Mat22.mul(xf2.R, new Vec2(-1.0f, 0.0f)));

			PolygonShape triangle2 = new PolygonShape();
			vertices[0] = Transform.mul(xf2, new Vec2(-1.0f, 0.0f));
			vertices[1] = Transform.mul(xf2, new Vec2(1.0f, 0.0f));
			vertices[2] = Transform.mul(xf2, new Vec2(0.0f, 0.5f));
			triangle2.set(vertices, 3);

			for (int i = 0; i < 10; ++i)
			{
				float x = MathUtils.randomFloat(-0.1f, 0.1f);
				BodyDef bd = new BodyDef();
				bd.type = BodyType.DYNAMIC;
				bd.position.set(x, 2.05f + 2.5f * i);
				bd.angle = 0.0f;
				Body body = m_world.createBody(bd);
				body.createFixture(triangle1, 2.0f);
				body.createFixture(triangle2, 2.0f);
			}
		}

		{
			PolygonShape bottom = new PolygonShape();
			bottom.setAsBox( 1.5f, 0.15f );

			PolygonShape left = new PolygonShape();
			left.setAsBox(0.15f, 2.7f, new Vec2(-1.45f, 2.35f), 0.2f);

			PolygonShape right = new PolygonShape();
			right.setAsBox(0.15f, 2.7f, new Vec2(1.45f, 2.35f), -0.2f);

			BodyDef bd = new BodyDef();
			bd.type = BodyType.DYNAMIC;
			bd.position.set( 0.0f, 2.0f );
			Body body = m_world.createBody(bd);
			body.createFixture(bottom, 4.0f);
			body.createFixture(left, 4.0f);
			body.createFixture(right, 4.0f);
		}
	}

	/**
	 * @see org.jbox2d.testbed.framework.TestbedTest#getTestName()
	 */
	@Override
	public String getTestName() {
		return "Compound Shapes";
	}
	
}