StateSortableMap.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.render.states;


/**
 * A state sortable map contains a list of StateSortable items for which an atom
 * may have. The index into this map is the stateType, and the values in the map
 * are StateSortable items.<br>
 * <br>
 * Each RenderBucket has a StateSortableMap and when an atom is assigned to that
 * bucket the atom is interrogated for its sortable states. This is then used in
 * conjuction with the state priority map to sort the atoms properly for
 * rendering,
 * 
 * @author David Yazel
 */
public final class StateSortableMap
{
    public final StateSortable[] map = new StateSortable[ StateUnit.MAX_STATE_TYPES ];
    public final long[] mapID = new long[ StateUnit.MAX_STATE_TYPES ];
    public long hash;
    
    public void calcHash()
    {
        hash = 0;
        for ( int i = 0; i < mapID.length; i++ )
            hash |= mapID[ i ] << ( 8 * i );
    }
    
    public StateSortableMap()
    {
    }
}