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* Copyright (c) 2013, Daniel Murphy
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package org.jbox2d.testbed.tests;
import org.jbox2d.collision.shapes.CircleShape;
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 FixedPendulumTest extends TestbedTest {
private final boolean switchBodiesInJoint;
public FixedPendulumTest(boolean switchBodiesInJoint) {
this.switchBodiesInJoint = switchBodiesInJoint;
}
@Override
public boolean isSaveLoadEnabled() {
return true;
}
@Override
public void initTest(boolean deserialized) {
if (deserialized) {
return;
}
Body pendulum;
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);
}
{
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyType.STATIC;
ground = getWorld().createBody(bodyDef);
}
RevoluteJointDef jointDef = new RevoluteJointDef();
if (switchBodiesInJoint)
jointDef.initialize(pendulum, ground, new Vec2(0, 0));
else
jointDef.initialize(ground, pendulum, new Vec2(0, 0));
pendulum.applyAngularImpulse(10000);
getWorld().createJoint(jointDef);
}
@Override
public String getTestName() {
return "Fixed Pendulum " + (switchBodiesInJoint ? "1" : "0");
}
}