package org.jbox2d.testbed.tests;



import org.jbox2d.collision.shapes.CircleShape;

import org.jbox2d.collision.shapes.PolygonShape;

import org.jbox2d.collision.shapes.Shape;

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.RevoluteJointDef;

import org.jbox2d.testbed.framework.TestbedTest;



public class FreePendulumTest extends TestbedTest

{

   private final boolean switchBodiesInJoint;



   public FreePendulumTest(boolean switchBodiesInJoint)

   {

      this.switchBodiesInJoint = switchBodiesInJoint;

   }

   

   @Override

   public void initTest(boolean argDeserialized)

   {

      Body pendulum;

      Body base;

      Body ground;



      {

         CircleShape circleShape = new CircleShape();

         circleShape.m_radius = 1;

         Shape shape = circleShape;

   

         BodyDef bodyDef = new BodyDef();

         bodyDef.type = BodyType.DYNAMIC;

         bodyDef.position.set(-5, 0);

         bodyDef.allowSleep = false;

         pendulum = getWorld().createBody(bodyDef);

         pendulum.createFixture(shape, 1);

      }

      

      {

         PolygonShape shape = new PolygonShape();

         shape.setAsBox(1, 1);

         

         BodyDef bodyDef = new BodyDef();

         bodyDef.type = BodyType.DYNAMIC;

         bodyDef.position.set(0, 2);

         bodyDef.allowSleep = false;

         base = getWorld().createBody(bodyDef);

         base.createFixture(shape, 1);

      }

      

      {

         PolygonShape shape = new PolygonShape();

         shape.setAsBox(3, 1);

         

         BodyDef bodyDef = new BodyDef();

         bodyDef.type = BodyType.STATIC;

         ground = getWorld().createBody(bodyDef);

         ground.createFixture(shape, 0);

      }

      

      RevoluteJointDef jointDef = new RevoluteJointDef();

      

      if (switchBodiesInJoint)

         jointDef.initialize(pendulum, base, new Vec2(0, 0));

      else

         jointDef.initialize(base, pendulum, new Vec2(0, 0));

      

      getWorld().createJoint(jointDef);

   }



   @Override

   public String getTestName()

   {

      return "Free Pendulum " + (switchBodiesInJoint ? "1" : "0");

   }

}