/**
* 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.material;
import ca.eandb.jmist.framework.Material;
import ca.eandb.jmist.framework.Medium;
import ca.eandb.jmist.framework.ScatteredRay;
import ca.eandb.jmist.framework.SurfacePoint;
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.Basis3;
import ca.eandb.jmist.math.Point2;
import ca.eandb.jmist.math.Point3;
import ca.eandb.jmist.math.Ray3;
import ca.eandb.jmist.math.Vector3;
/**
* @author Brad
*
*/
public final class ShadingNormalAdapterMaterial implements Material {
/** Serialization version ID. */
private static final long serialVersionUID = 6083972357040808677L;
private final Material inner;
private static final class SurfacePointAdapter implements SurfacePoint {
private final SurfacePoint inner;
public SurfacePointAdapter(SurfacePoint inner) {
this.inner = inner;
}
@Override
public Point3 getPosition() {
return inner.getPosition();
}
@Override
public Vector3 getNormal() {
return inner.getShadingNormal();
}
@Override
public Basis3 getBasis() {
return inner.getShadingBasis();
}
@Override
public Vector3 getShadingNormal() {
return inner.getShadingNormal();
}
@Override
public Basis3 getShadingBasis() {
return inner.getShadingBasis();
}
@Override
public Vector3 getTangent() {
return inner.getShadingBasis().u();
}
@Override
public Point2 getUV() {
return inner.getUV();
}
@Override
public int getPrimitiveIndex() {
return inner.getPrimitiveIndex();
}
@Override
public Material getMaterial() {
return inner.getMaterial();
}
@Override
public Medium getAmbientMedium() {
return inner.getAmbientMedium();
}
}
public ShadingNormalAdapterMaterial(Material inner) {
this.inner = inner;
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Medium#transmittance(ca.eandb.jmist.math.Ray3, double, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public Color transmittance(Ray3 ray, double distance,
WavelengthPacket lambda) {
return inner.transmittance(ray, distance, lambda);
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Medium#refractiveIndex(ca.eandb.jmist.math.Point3, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public Color refractiveIndex(Point3 p, WavelengthPacket lambda) {
return inner.refractiveIndex(p, lambda);
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Medium#extinctionIndex(ca.eandb.jmist.math.Point3, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public Color extinctionIndex(Point3 p, WavelengthPacket lambda) {
return inner.extinctionIndex(p, lambda);
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#isEmissive()
*/
@Override
public boolean isEmissive() {
return inner.isEmissive();
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#scatter(ca.eandb.jmist.framework.SurfacePoint, ca.eandb.jmist.math.Vector3, boolean, ca.eandb.jmist.framework.color.WavelengthPacket, double, double, double)
*/
@Override
public ScatteredRay scatter(SurfacePoint x, Vector3 v, boolean adjoint,
WavelengthPacket lambda, double ru, double rv, double rj) {
SurfacePoint adapter = new SurfacePointAdapter(x);
ScatteredRay sr = inner.scatter(adapter, v, adjoint, lambda, ru, rv, rj);
if (sr != null) {
double idotn = -v.dot(x.getNormal());
double odotn = sr.getRay().direction().dot(x.getNormal());
boolean transmitted = sr.isTransmitted();
boolean sameSide = (idotn > 0 && odotn > 0) || (idotn < 0 && odotn < 0);
if ((transmitted && !sameSide) || (!transmitted && sameSide)) {
return sr;
}
}
return null;
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#emit(ca.eandb.jmist.framework.SurfacePoint, ca.eandb.jmist.framework.color.WavelengthPacket, double, double, double)
*/
@Override
public ScatteredRay emit(SurfacePoint x, WavelengthPacket lambda,
double ru, double rv, double rj) {
return inner.emit(x, lambda, ru, rv, rj);
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#getScatteringPDF(ca.eandb.jmist.framework.SurfacePoint, ca.eandb.jmist.math.Vector3, ca.eandb.jmist.math.Vector3, boolean, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public double getScatteringPDF(SurfacePoint x, Vector3 in, Vector3 out,
boolean adjoint, WavelengthPacket lambda) {
double idotn = -in.dot(x.getNormal());
double idots = -in.dot(x.getShadingNormal());
double odotn = out.dot(x.getNormal());
double odots = out.dot(x.getShadingNormal());
if ((idotn > 0) == (idots > 0) && (odotn > 0) == (odots > 0)) {
SurfacePoint adapter = new SurfacePointAdapter(x);
double pdf = inner.getScatteringPDF(adapter, in, out, adjoint, lambda);
if (adjoint) {
return pdf * odots / odotn;
} else {
return pdf;
}
} else {
return 0.0;
}
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#getEmissionPDF(ca.eandb.jmist.framework.SurfacePoint, ca.eandb.jmist.math.Vector3, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public double getEmissionPDF(SurfacePoint x, Vector3 out,
WavelengthPacket lambda) {
return inner.getEmissionPDF(x, out, lambda);
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#bsdf(ca.eandb.jmist.framework.SurfacePoint, ca.eandb.jmist.math.Vector3, ca.eandb.jmist.math.Vector3, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public Color bsdf(SurfacePoint x, Vector3 in, Vector3 out,
WavelengthPacket lambda) {
double idotn = -in.dot(x.getNormal());
double idots = -in.dot(x.getShadingNormal());
double odotn = out.dot(x.getNormal());
double odots = out.dot(x.getShadingNormal());
if ((idotn > 0) == (idots > 0) && (odotn > 0) == (odots > 0)) {
SurfacePoint adapter = new SurfacePointAdapter(x);
return inner.bsdf(adapter, in, out, lambda);
} else {
return ColorUtil.getBlack(lambda);
}
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.Material#emission(ca.eandb.jmist.framework.SurfacePoint, ca.eandb.jmist.math.Vector3, ca.eandb.jmist.framework.color.WavelengthPacket)
*/
@Override
public Color emission(SurfacePoint x, Vector3 out, WavelengthPacket lambda) {
return inner.emission(x, out, lambda);
}
}