@Override
    public void read(JmeImporter im) throws IOException {
        super.read(im);
        createJoint();
        InputCapsule cap=im.getCapsule(this);
        setDamping(cap.readFloat("damping", 1.0f));
        setDamping(cap.readFloat("tau", 0.3f));
        setDamping(cap.readFloat("impulseClamp", 0f));
    }
@param nodeA the body for the A end (not null, alias created)
@param nodeB the body for the B end (not null, alias created)
@param pivotA local translation of the joint connection point in node A
@param pivotB local translation of the joint connection point in node B
jme3-jbullet/src/main/java/com/jme3/bullet/joints/Point2PointJoint.java