public void setDirection(Vector3f direction) {
        this.direction = direction;
        if (channel >= 0)
            getRenderer().updateSourceParam(this, AudioParam.Direction);
    }
Set the direction of this audio node.
Does nothing if the audio node is not directional.

@param direction a direction vector (alias created)
@see AudioNode#setDirectional(boolean)
jme3-core/src/main/java/com/jme3/audio/AudioNode.java