UpdatableNode.java

/**
 * Copyright (c) 2003-2009, Xith3D Project Group all rights reserved.
 * 
 * Portions based on the Java3D interface, Copyright by Sun Microsystems.
 * Many thanks to the developers of Java3D and Sun Microsystems for their
 * innovation and design.
 * 
 * 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 the 'Xith3D Project Group' 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
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package org.xith3d.scenegraph;

import org.openmali.spatial.bodies.Frustum;

/**
 * Node updater interface is designed to allow special code to adjust a node's appearance if it is
 * going to be rendered.  This should *not* be used to adjust a transform since these methods
 * are only called if the renderer has determined that the node is within view.  This is a way
 * of adjusting display only when necessary.  An example would be a particle system, where you
 * only want to acutally adjust the geometry if the particle system is within view.
 * 
 * @author David Yazel
 * @author Marvin Froehlich (aka Qudus)
 */
public interface UpdatableNode// extends Node
{
    /**
     * @param view the view that's currently used for rendering
     * @param frustum view frustum
     * @param nanoTime
     * @param nanoStep
     * 
     * @return True if this should be rendered, false if it should not.
     */
    public abstract boolean update( View view, Frustum frustum, long nanoTime, long nanoStep );
}