/* 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.AABB;
import se.llbit.math.DoubleSidedQuad;
import se.llbit.math.Quad;
import se.llbit.math.QuickMath;
import se.llbit.math.Ray;
import se.llbit.math.Vector3d;
import se.llbit.math.Vector4d;
@SuppressWarnings("javadoc")
public class BrewingStandModel {
private static final AABB[] boxes = new AABB[] {
new AABB(7/16., 9/16., 0, 14/16., 7/16., 9/16.),
new AABB(9/16., 15/16., 0, 2/16., 5/16., 11/16.),
new AABB(2/16., 8/16., 0, 2/16., 9/16., 15/16.),
new AABB(2/16., 8/16., 0, 2/16., 1/16., 7/16.),
};
private static final Texture[] tex = {
Texture.brewingStandSide,
Texture.brewingStandBase,
Texture.brewingStandBase,
Texture.brewingStandBase,
};
private static final Quad[] quads = new Quad[] {
// east
new DoubleSidedQuad(new Vector3d(9/16., 0, .5), new Vector3d(1, 0, .5),
new Vector3d(.5, 1, .5), new Vector4d(9/16., 1, 0, 1)),
// southwest 210
new DoubleSidedQuad(new Vector3d(.46, 0, 9/16.), new Vector3d(.25, 0, .933),
new Vector3d(.46, 1, 9/16.), new Vector4d(9/16., 1, 0, 1)),
// northwest 330
new DoubleSidedQuad(new Vector3d(.46, 0, 7/16.), new Vector3d(.25, 0, .067),
new Vector3d(.46, 1, 7/16.), new Vector4d(9/16., 1, 0, 1)),
};
public static boolean intersect(Ray ray) {
int data = ray.getBlockData();
boolean hit = false;
ray.t = Double.POSITIVE_INFINITY;
for (int i = 0; i < boxes.length; ++i) {
if (boxes[i].intersect(ray)) {
ray.t = ray.tNear;
tex[i].getColor(ray);
ray.color.w = 1;
hit = true;
}
}
for (int i = 0; i < quads.length; ++i) {
Quad quad = quads[i];
if (quad.intersect(ray)) {
int bottle = (data>>i) & 1;
float[] color = Texture.brewingStandSide.getColor(
bottle + (1 - 2 * bottle) * ray.u, ray.v);
if (color[3] > Ray.EPSILON) {
ray.color.set(color);
ray.t = ray.tNear;
ray.n.set(quad.n);
ray.n.scale(QuickMath.signum(-ray.d.dot(quad.n)));
hit = true;
}
}
}
if (hit) {
ray.distance += ray.t;
ray.x.scaleAdd(ray.t, ray.d, ray.x);
}
return hit;
}
}