org.jbox2d.dynamics.joints.ConstantVolumeJointDef Maven / Gradle / Ivy
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package org.jbox2d.dynamics.joints;
import org.jbox2d.dynamics.Body;
/**
* Definition for a {@link ConstantVolumeJoint}, which connects a group a bodies together
* so they maintain a constant volume within them.
*/
public class ConstantVolumeJointDef extends JointDef {
Body[] bodies;
public float frequencyHz;
public float dampingRatio;
//public float relaxationFactor;//1.0 is perfectly stiff (but doesn't work, unstable)
public ConstantVolumeJointDef() {
type = JointType.CONSTANT_VOLUME;
bodies = new Body[0];
//relaxationFactor = 0.9f;
collideConnected = false;
frequencyHz = 0.0f;
dampingRatio = 0.0f;
}
public void addBody(final Body b) {
final Body[] tmp = new Body[bodies.length+1];
System.arraycopy(bodies, 0, tmp, 0, bodies.length);
tmp[bodies.length] = b;
bodies = tmp;
if (tmp.length == 1) {
bodyA = b;
}
if (tmp.length == 2) {
bodyB = b;
}
}
}