public float damping() {
        assert damping >= 0f : damping;
        return damping;
    }
Read the damping ratio for new rigid bodies.

@return the viscous damping ratio (0&rarr;no damping, 1&rarr;critically
damped)
jme3-jbullet/src/main/java/com/jme3/bullet/animation/DacConfiguration.java