public void setSleepingThresholds(float linear, float angular) {
        constructionInfo.linearSleepingThreshold = linear;
        constructionInfo.angularSleepingThreshold = angular;
        rBody.setSleepingThresholds(linear, angular);
    }
sets the sleeping thresholds, these define when the object gets deactivated
to save resources. Low values keep the object active when it barely moves
@param linear the linear sleeping threshold
@param angular the angular sleeping threshold
jme3-jbullet/src/main/java/com/jme3/bullet/objects/PhysicsRigidBody.java