/*
* Copyright (c) 2009-2016 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.audio;
import com.jme3.app.Application;
import com.jme3.app.state.BaseAppState;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.renderer.Camera;
import com.jme3.renderer.RenderManager;
/**
* <code>AudioListenerState</code> updates the audio listener's position,
* orientation, and velocity from a {@link Camera}.
*
* @author Kirill Vainer
*/
public class AudioListenerState extends BaseAppState {
private Listener listener;
private Camera camera;
private float lastTpf;
public AudioListenerState() {
}
@Override
protected void initialize(Application app) {
this.camera = app.getCamera();
this.listener = app.getListener();
}
@Override
protected void cleanup(Application app) {
}
@Override
public void update(float tpf) {
lastTpf = tpf;
}
@Override
public void render(RenderManager rm) {
if (!isEnabled() || listener == null) {
return;
}
Vector3f lastLocation = listener.getLocation();
Vector3f currentLocation = camera.getLocation();
Vector3f velocity = listener.getVelocity();
if (!lastLocation.equals(currentLocation)) {
velocity.set(currentLocation).subtractLocal(lastLocation);
velocity.multLocal(1f / lastTpf);
listener.setLocation(currentLocation);
listener.setVelocity(velocity);
} else if (!velocity.equals(Vector3f.ZERO)) {
listener.setVelocity(Vector3f.ZERO);
}
Quaternion lastRotation = listener.getRotation();
Quaternion currentRotation = camera.getRotation();
if (!lastRotation.equals(currentRotation)) {
listener.setRotation(currentRotation);
}
}
@Override
protected void onEnable() {
}
@Override
protected void onDisable() {
}
}