/**
* 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.light;
import ca.eandb.jmist.framework.LightSample;
import ca.eandb.jmist.framework.SurfacePoint;
import ca.eandb.jmist.framework.VisibilityFunction3;
import ca.eandb.jmist.framework.color.Color;
import ca.eandb.jmist.math.Point3;
import ca.eandb.jmist.math.Ray3;
import ca.eandb.jmist.math.Vector3;
/**
* @author brad
*
*/
public final class PointLightSample implements LightSample {
private final SurfacePoint x;
private final Point3 position;
private final Color intensity;
private final boolean shadows;
/**
* @param x
* @param position
* @param intensity
* @param shadows
*/
public PointLightSample(SurfacePoint x, Point3 position, Color intensity,
boolean shadows) {
this.x = x;
this.position = position;
this.intensity = intensity;
this.shadows = shadows;
}
/**
* @param x
* @param position
* @param intensity
*/
public PointLightSample(SurfacePoint x, Point3 position, Color intensity) {
this(x, position, intensity, true);
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.LightSample#castShadowRay(ca.eandb.jmist.framework.VisibilityFunction3)
*/
public boolean castShadowRay(VisibilityFunction3 vf) {
return shadows && !vf.visibility(new Ray3(x.getPosition(), position));
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.LightSample#getRadiantIntensity()
*/
public Color getRadiantIntensity() {
return intensity;
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.LightSample#getDirToLight()
*/
public Vector3 getDirToLight() {
return x.getPosition().vectorTo(position).unit();
}
}