ShapeEditing.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 2:04:52 PM Jan 23, 2011
 */
package org.jbox2d.gwt.showcase.client.example;

import java.util.List;

import org.jbox2d.collision.shapes.CircleShape;
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.Fixture;
import org.jbox2d.gwt.showcase.client.framework.BaseExample;
import org.jbox2d.gwt.showcase.client.framework.ShowcaseSettings;

/**
 * @author Daniel Murphy
 */
public class ShapeEditing extends BaseExample {
	
	Body m_body;
	Fixture m_fixture1;
	Fixture m_fixture2;
	
	/**
	 * @see org.jbox2d.testbed.framework.TestbedTest#initTest()
	 */
	@Override
	public void initTest() {
		{
			BodyDef bd = new BodyDef();
			Body 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);
		}

		BodyDef bd = new BodyDef();
		bd.type = BodyType.DYNAMIC;
		bd.position.set(0.0f, 10.0f);
		m_body = m_world.createBody(bd);

		PolygonShape shape = new PolygonShape();
		shape.setAsBox(4.0f, 4.0f, new Vec2(0.0f, 0.0f), 0.0f);
		m_fixture1 = m_body.createFixture(shape, 10.0f);

		m_fixture2 = null;
	}
	
	/**
	 * @see org.jbox2d.testbed.framework.TestbedTest#keyPressed(char, int)
	 */
	@Override
	public void keyPressed(char key, int argKeyCode, ShowcaseSettings settings) {
		switch (key)
		{
		case 'c':
			if (m_fixture2 == null)
			{
				CircleShape shape = new CircleShape();
				shape.m_radius = 3.0f;
				shape.m_p.set(0.5f, -4.0f);
				m_fixture2 = m_body.createFixture(shape, 10.0f);
				m_body.setAwake(true);
			}
			break;

		case 'd':
			if (m_fixture2 != null)
			{
				m_body.destroyFixture(m_fixture2);
				m_fixture2 = null;
				m_body.setAwake(true);
			}
			break;
		}
	}
	
  @Override
  public List<String> getInstructions() {
    List<String> instructions = super.getInstructions();
    instructions.add("Press: (c) create a shape, (d) destroy a shape.");
    return instructions;
  }

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