/* Copyright (c) 2012 Jesper Öqvist <jesper@llbit.se>
*
* This file is part of Chunky.
*
* Chunky is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Chunky is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with Chunky. If not, see <http://www.gnu.org/licenses/>.
*/
package se.llbit.chunky.model;
import se.llbit.chunky.resources.Texture;
import se.llbit.math.Quad;
import se.llbit.math.Ray;
import se.llbit.math.Vector3;
import se.llbit.math.Vector4;
public class CakeModel {
private static Quad[] quads = {
// front
new Quad(new Vector3(.9375, 0, .0625), new Vector3(.0625, 0, .0625),
new Vector3(.9375, .5, .0625), new Vector4(.9375, .0625, 0, .5)),
// back
new Quad(new Vector3(.0625, 0, .9375), new Vector3(.9375, 0, .9375),
new Vector3(.0625, .5, .9375), new Vector4(.0625, .9375, 0, .5)),
// right
new Quad(new Vector3(.0625, 0, .0625), new Vector3(.0625, 0, .9375),
new Vector3(.0625, .5, .0625), new Vector4(.0625, .9375, 0, .5)),
// left
new Quad(new Vector3(.9375, 0, .9375), new Vector3(.9375, 0, .0625),
new Vector3(.9375, .5, .9375), new Vector4(.9375, .0625, 0, .5)),
// top
new Quad(new Vector3(.9375, .5, .0625), new Vector3(.0625, .5, .0625),
new Vector3(.9375, .5, .9375), new Vector4(.9375, .0625, .0625, .9375)),
// bottom
new Quad(new Vector3(.0625, 0, .0625), new Vector3(.9375, 0, .0625),
new Vector3(.0625, 0, .9375), new Vector4(.0625, .9375, .0625, .9375)),};
public static boolean intersect(Ray ray) {
boolean hit = false;
ray.t = Double.POSITIVE_INFINITY;
for (Quad quad : quads) {
if (quad.intersect(ray)) {
if (quad.n.y > 0)
Texture.cakeTop.getColor(ray);
else if (quad.n.y < 0)
Texture.cakeBottom.getColor(ray);
else
Texture.cakeSide.getColor(ray);
ray.n.set(quad.n);
ray.t = ray.tNext;
hit = true;
}
}
if (hit) {
ray.color.w = 1;
ray.distance += ray.t;
ray.o.scaleAdd(ray.t, ray.d);
}
return hit;
}
}