/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.physics.box2d.joints;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.Body;
import com.badlogic.gdx.physics.box2d.JointDef;
public class WeldJointDef extends JointDef {
public WeldJointDef () {
type = JointType.WeldJoint;
}
// / Initialize the bodies, anchors, and reference angle using a world
// / anchor point.
public void initialize (Body body1, Body body2, Vector2 anchor) {
this.bodyA = body1;
this.bodyB = body2;
this.localAnchorA.set(body1.getLocalPoint(anchor));
this.localAnchorB.set(body2.getLocalPoint(anchor));
referenceAngle = body2.getAngle() - body1.getAngle();
}
/** The local anchor point relative to body1's origin. */
public final Vector2 localAnchorA = new Vector2();
/** The local anchor point relative to body2's origin. */
public final Vector2 localAnchorB = new Vector2();
/** The body2 angle minus body1 angle in the reference state (radians). */
public float referenceAngle = 0;
/** The mass-spring-damper frequency in Hertz. Rotation only. Disable softness with a value of 0. */
public float frequencyHz = 0;
/** The damping ratio. 0 = no damping, 1 = critical damping. */
public float dampingRatio = 0;
@Override
public org.jbox2d.dynamics.joints.JointDef toJBox2d () {
org.jbox2d.dynamics.joints.WeldJointDef jd = new org.jbox2d.dynamics.joints.WeldJointDef();
jd.bodyA = bodyA.body;
jd.bodyB = bodyB.body;
jd.collideConnected = collideConnected;
jd.dampingRatio = dampingRatio;
jd.frequencyHz = frequencyHz;
jd.localAnchorA.set(localAnchorA.x, localAnchorA.y);
jd.localAnchorB.set(localAnchorB.x, localAnchorB.y);
jd.referenceAngle = referenceAngle;
jd.type = org.jbox2d.dynamics.joints.JointType.WELD;
return jd;
}
}