/**
* 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;
import ca.eandb.jmist.math.Basis3;
import ca.eandb.jmist.math.Point2;
import ca.eandb.jmist.math.Point3;
import ca.eandb.jmist.math.Vector3;
/**
* Rendering utility methods.
* @author Brad Kimmel
*/
public final class RenderUtil {
/**
* This constructor is private because this class cannot be instantiated.
*/
private RenderUtil() {}
/**
* A basic <code>SurfacePointGeometry</code> that has a position,
* orientation, micro-surface orientation, and texture coordinates.
* @author brad
*
*/
private static final class SimpleSurfacePointGeometry implements SurfacePointGeometry {
private final Point3 position;
private final Basis3 basis;
private final Basis3 shadingBasis;
private final Point2 textureCoordinates;
/**
* @param position
* @param basis
* @param shadingBasis
* @param textureCoordinates
*/
public SimpleSurfacePointGeometry(Point3 position, Basis3 basis,
Basis3 shadingBasis, Point2 textureCoordinates) {
this.position = position;
this.basis = basis;
this.shadingBasis = shadingBasis;
this.textureCoordinates = textureCoordinates;
}
public Basis3 getBasis() {
return basis;
}
public Vector3 getNormal() {
return basis.w();
}
public Point3 getPosition() {
return position;
}
public int getPrimitiveIndex() {
return 0;
}
public Basis3 getShadingBasis() {
return null;
}
public Vector3 getShadingNormal() {
return shadingBasis.w();
}
public Vector3 getTangent() {
return basis.u();
}
public Point2 getUV() {
return textureCoordinates;
}
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param N The normal.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Vector3 N) {
Basis3 basis = Basis3.fromW(N);
return new SimpleSurfacePointGeometry(p, basis, basis, Point2.ORIGIN);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param N The normal.
* @param shadingNormal The micro-surface normal.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Vector3 N, Vector3 shadingNormal) {
Basis3 basis = Basis3.fromW(N);
Basis3 shadingBasis = Basis3.fromW(shadingNormal);
return new SimpleSurfacePointGeometry(p, basis, shadingBasis, Point2.ORIGIN);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param basis The orientation of the surface.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Basis3 basis) {
return new SimpleSurfacePointGeometry(p, basis, basis, Point2.ORIGIN);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param basis The orientation of the surface.
* @param shadingBasis The micro-surface orientation.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Basis3 basis, Basis3 shadingBasis) {
return new SimpleSurfacePointGeometry(p, basis, shadingBasis, Point2.ORIGIN);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param N The normal.
* @param uv The texture coordinates.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Vector3 N, Point2 uv) {
Basis3 basis = Basis3.fromW(N);
return new SimpleSurfacePointGeometry(p, basis, basis, uv);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param N The normal.
* @param shadingNormal The micro-surface normal.
* @param uv The texture coordinates.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Vector3 N, Vector3 shadingNormal, Point2 uv) {
Basis3 basis = Basis3.fromW(N);
Basis3 shadingBasis = Basis3.fromW(shadingNormal);
return new SimpleSurfacePointGeometry(p, basis, shadingBasis, uv);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param basis The orientation.
* @param uv The texture coordinates.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Basis3 basis, Point2 uv) {
return new SimpleSurfacePointGeometry(p, basis, basis, uv);
}
/**
* Creates a <code>SurfacePointGeometry</code>.
* @param p The position.
* @param basis The orientation.
* @param shadingBasis The micro-surface orientation.
* @param uv The texture coordinates.
* @return A <code>SurfacePointGeometry</code>.
*/
public static SurfacePointGeometry createSurfacePointGeometry(Point3 p, Basis3 basis, Basis3 shadingBasis, Point2 uv) {
return new SimpleSurfacePointGeometry(p, basis, shadingBasis, uv);
}
}