FixedFuncTextureProjectionFectory.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
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * POSSIBILITY OF SUCH DAMAGE
 */
package org.xith3d.effects.textureprojection;

import java.io.IOException;

import org.jagatoo.opengl.enums.TexCoordGenMode;
import org.openmali.vecmath2.Vector4f;
import org.xith3d.scenegraph.Appearance;
import org.xith3d.scenegraph.ProjectiveTextureUnit;
import org.xith3d.scenegraph.TexCoordGeneration;

/**
 * This {@link TextureProjectionFactory} uses the fixed-function-pipeline
 * to realize texture-projection.
 * 
 * @author Marvin Froehlich (aka Qudus)
 */
public class FixedFuncTextureProjectionFectory extends TextureProjectionFactory
{
    private static TexCoordGeneration texGen = null;
    
    /**
     * @return the (cached) {@link TexCoordGeneration} that calculates the
     * texture-coordinates for shadow-mapping.
     * 
     * @throws IOException
     */
    public TexCoordGeneration getTexCoordGeneration()
    {
        if ( texGen != null )
            return ( texGen );
        
        texGen = new TexCoordGeneration( TexCoordGenMode.EYE_LINEAR,
                                         TexCoordGeneration.CoordMode.TEXTURE_COORDINATES_4
                                       );
        
        texGen.setPlaneR( new Vector4f( 0f, 0f, 1f, 0f ) );
        texGen.setPlaneQ( new Vector4f( 0f, 0f, 0f, 1f ) );
        
        return ( texGen );
    }
    
    /**
     * {@inheritDoc}
     */
    @Override
    public void onProjectiveTextureApplied( Appearance app, ProjectiveTextureUnit projTU )
    {
        if ( app != null )
        {
            projTU.setTexCoordGeneration( getTexCoordGeneration() );
        }
        else
        {
            projTU.setTexCoordGeneration( null );
        }
    }
    
    public FixedFuncTextureProjectionFectory()
    {
    }
}