/**
* Java Modular Image Synthesis Toolkit (JMIST)
* Copyright (C) 2008-2013 Bradley W. Kimmel
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package ca.eandb.jmist.framework.shader;
import ca.eandb.jmist.framework.Shader;
import ca.eandb.jmist.framework.ShadingContext;
import ca.eandb.jmist.framework.color.Color;
import ca.eandb.jmist.math.Vector3;
/**
* A <code>Shader</code> that assigns a colour based on the surface normal.
*
* @author Brad Kimmel
*/
public final class NormalShader implements Shader {
/** Serialization version ID. */
private static final long serialVersionUID = -4724073342278275837L;
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Shader#shade(ca.eandb.jmist.framework.ShadingContext)
*/
@Override
public Color shade(ShadingContext sc) {
Vector3 n = sc.getShadingNormal();
double r = Math.abs(n.x());
double g = Math.abs(n.y());
double b = Math.abs(n.z());
double c = Math.max(r, Math.max(g, b));
return sc.getColorModel().fromRGB(r / c, g / c, b / c).sample(sc.getWavelengthPacket());
}
}