/*
 * Copyright (c) 2003-2006 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
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package jmetest.flagrushtut.lesson6.actions;

import jmetest.flagrushtut.lesson6.Vehicle;

import com.jme.input.action.InputActionEvent;
import com.jme.input.action.KeyInputAction;
import com.jme.math.Vector3f;

/**
 * AccelerateAction defines the action that occurs when the key is pressed to 
 * speed the Vehicle up. It obtains the velocity of the vehicle and 
 * translates the vehicle by this value.
 * @author Mark Powell
 *
 */
public class AccelerateAction extends KeyInputAction {
    //the node to manipulate
    private Vehicle node;
    //temporary vector for the rotation
    private static final Vector3f tempVa = new Vector3f();

    /**
     * The vehicle to accelerate is supplied during construction.
     * @param node the vehicle to speed up.
     */
    public AccelerateAction(Vehicle node) {
        this.node = node;
    }

    /**
     * the action calls the vehicle's accelerate command which adjusts its velocity. It
     * then translates the vehicle based on this new velocity value.
     */
    public void performAction(InputActionEvent evt) {
        node.accelerate(evt.getTime());
        Vector3f loc = node.getLocalTranslation();
        loc.addLocal(node.getLocalRotation().getRotationColumn(2, tempVa)
                .multLocal(node.getVelocity() * evt.getTime()));
        node.setLocalTranslation(loc);
    }
}