/**
* 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.image;
import ca.eandb.jmist.framework.ImageShader;
import ca.eandb.jmist.framework.Lens;
import ca.eandb.jmist.framework.Random;
import ca.eandb.jmist.framework.RayShader;
import ca.eandb.jmist.framework.ScatteredRay;
import ca.eandb.jmist.framework.color.Color;
import ca.eandb.jmist.framework.color.ColorUtil;
import ca.eandb.jmist.framework.color.WavelengthPacket;
import ca.eandb.jmist.math.Point2;
import ca.eandb.jmist.math.Ray3;
/**
* An image shader that uses a Lens to shade rays corresponding to points
* on the image plane.
* @author Brad Kimmel
*/
public final class CameraImageShader implements ImageShader {
/**
* Serialization version ID.
*/
private static final long serialVersionUID = 5027288502738131936L;
/**
* Initializes the lens and ray shader to use to shade points on
* the image plane.
* @param lens The lens to use to generate rays corresponding to
* points on the image plane.
* @param rayShader The shader to use to shade rays.
*/
public CameraImageShader(Lens lens, RayShader rayShader) {
this.lens = lens;
this.rayShader = rayShader;
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.ImageShader#shadeAt(ca.eandb.jmist.math.Point2, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
public Color shadeAt(Point2 p, WavelengthPacket lambda) {
ScatteredRay sr = lens.rayAt(p, lambda, Random.DEFAULT);
if (sr != null) {
Ray3 ray = sr.getRay();
Color scale = sr.getColor();
Color shade = rayShader.shadeRay(ray, lambda);
return shade.times(scale);
} else {
return ColorUtil.getBlack(lambda);
}
}
/**
* The lens to use to obtain rays corresponding to points on the
* image plane.
*/
private final Lens lens;
/** The shader to use to shade rays. */
private final RayShader rayShader;
}