/*******************************************************************************
 * Copyright (c) 2013, 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.
 * 
 * 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 HOLDER 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.
 ******************************************************************************/
/**
 * Created at 2:10:11 PM Jan 23, 2011
 */
package org.jbox2d.testbed.tests;

import org.jbox2d.collision.shapes.EdgeShape;
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.joints.DistanceJointDef;
import org.jbox2d.dynamics.joints.Joint;
import org.jbox2d.testbed.framework.TestbedSettings;
import org.jbox2d.testbed.framework.TestbedTest;

/**
 * @author Daniel Murphy
 */
public class Web extends TestbedTest {

  Body m_bodies[] = new Body[4];
  Joint m_joints[] = new Joint[8];

  /**
   * @see org.jbox2d.testbed.framework.TestbedTest#initTest(boolean)
   */
  @Override
  public void initTest(boolean argDeserialized) {
    Body ground = null;
    {
      BodyDef bd = new BodyDef();
      ground = getWorld().createBody(bd);

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

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

      BodyDef bd = new BodyDef();
      bd.type = BodyType.DYNAMIC;

      bd.position.set(-5.0f, 5.0f);
      m_bodies[0] = getWorld().createBody(bd);
      m_bodies[0].createFixture(shape, 5.0f);

      bd.position.set(5.0f, 5.0f);
      m_bodies[1] = getWorld().createBody(bd);
      m_bodies[1].createFixture(shape, 5.0f);

      bd.position.set(5.0f, 15.0f);
      m_bodies[2] = getWorld().createBody(bd);
      m_bodies[2].createFixture(shape, 5.0f);

      bd.position.set(-5.0f, 15.0f);
      m_bodies[3] = getWorld().createBody(bd);
      m_bodies[3].createFixture(shape, 5.0f);

      DistanceJointDef jd = new DistanceJointDef();
      Vec2 p1 = new Vec2();
      Vec2 p2 = new Vec2();
      Vec2 d = new Vec2();

      jd.frequencyHz = 4.0f;
      jd.dampingRatio = 0.5f;

      jd.bodyA = ground;
      jd.bodyB = m_bodies[0];
      jd.localAnchorA.set(-10.0f, 0.0f);
      jd.localAnchorB.set(-0.5f, -0.5f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[0] = getWorld().createJoint(jd);

      jd.bodyA = ground;
      jd.bodyB = m_bodies[1];
      jd.localAnchorA.set(10.0f, 0.0f);
      jd.localAnchorB.set(0.5f, -0.5f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[1] = getWorld().createJoint(jd);

      jd.bodyA = ground;
      jd.bodyB = m_bodies[2];
      jd.localAnchorA.set(10.0f, 20.0f);
      jd.localAnchorB.set(0.5f, 0.5f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[2] = getWorld().createJoint(jd);

      jd.bodyA = ground;
      jd.bodyB = m_bodies[3];
      jd.localAnchorA.set(-10.0f, 20.0f);
      jd.localAnchorB.set(-0.5f, 0.5f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[3] = getWorld().createJoint(jd);

      jd.bodyA = m_bodies[0];
      jd.bodyB = m_bodies[1];
      jd.localAnchorA.set(0.5f, 0.0f);
      jd.localAnchorB.set(-0.5f, 0.0f);;
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[4] = getWorld().createJoint(jd);

      jd.bodyA = m_bodies[1];
      jd.bodyB = m_bodies[2];
      jd.localAnchorA.set(0.0f, 0.5f);
      jd.localAnchorB.set(0.0f, -0.5f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[5] = getWorld().createJoint(jd);

      jd.bodyA = m_bodies[2];
      jd.bodyB = m_bodies[3];
      jd.localAnchorA.set(-0.5f, 0.0f);
      jd.localAnchorB.set(0.5f, 0.0f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[6] = getWorld().createJoint(jd);

      jd.bodyA = m_bodies[3];
      jd.bodyB = m_bodies[0];
      jd.localAnchorA.set(0.0f, -0.5f);
      jd.localAnchorB.set(0.0f, 0.5f);
      p1 = jd.bodyA.getWorldPoint(jd.localAnchorA);
      p2 = jd.bodyB.getWorldPoint(jd.localAnchorB);
      d = p2.sub(p1);
      jd.length = d.length();
      m_joints[7] = getWorld().createJoint(jd);
    }
  }

  /**
   * @see org.jbox2d.testbed.framework.TestbedTest#keyPressed(char, int)
   */
  @Override
  public void keyPressed(char key, int argKeyCode) {
    switch (key) {
      case 'b':
        for (int i = 0; i < 4; ++i) {
          if (m_bodies[i] != null) {
            getWorld().destroyBody(m_bodies[i]);
            m_bodies[i] = null;
            break;
          }
        }
        break;

      case 'j':
        for (int i = 0; i < 8; ++i) {
          if (m_joints[i] != null) {
            getWorld().destroyJoint(m_joints[i]);
            m_joints[i] = null;
            break;
          }
        }
        break;
    }
  }

  /**
   * @see org.jbox2d.testbed.framework.TestbedTest#step(org.jbox2d.testbed.framework.TestbedSettings)
   */
  @Override
  public void step(TestbedSettings settings) {
    super.step(settings);
    addTextLine("This demonstrates a soft distance joint.");
    addTextLine("Press: (b) to delete a body, (j) to delete a joint");
  }

  public void jointDestroyed(Joint joint) {
    for (int i = 0; i < 8; ++i) {
      if (m_joints[i] == joint) {
        m_joints[i] = null;
        break;
      }
    }
  }

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

}
