/* 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.Vector3d;
import se.llbit.math.Vector4d;
/**
* A generic block.
* @author Jesper Öqvist <jesper@llbit.se>
*/
public class SignPostModel {
// facing south
protected static Quad[] sides = {
// front
new Quad(new Vector3d(0, .5, 9/16.), new Vector3d(1, .5, 9/16.),
new Vector3d(0, 1, 9/16.), new Vector4d(2/64., 26/64., 18/32., 30/32.)),
// back
new Quad(new Vector3d(1, .5, 7/16.), new Vector3d(0, .5, 7/16.),
new Vector3d(1, 1, 7/16.), new Vector4d(28/64., 52/64., 18/32., 30/32.)),
// left
new Quad(new Vector3d(0, .5, 7/16.), new Vector3d(0, .5, 9/16.),
new Vector3d(0, 1, 7/16.), new Vector4d(0, 2/64., 18/32., 30/32.)),
// right
new Quad(new Vector3d(1, .5, 9/16.), new Vector3d(1, .5, 7/16.),
new Vector3d(1, 1, 9/16.), new Vector4d(26/64., 28/64., 18/32., 30/32.)),
// top
new Quad(new Vector3d(1, 1, 7/16.), new Vector3d(0, 1, 7/16.),
new Vector3d(1, 1, 9/16.), new Vector4d(2/64., 26/64., 1, 30/32.)),
// bottom
new Quad(new Vector3d(0, .5, 7/16.), new Vector3d(1, .5, 7/16.),
new Vector3d(0, .5, 9/16.), new Vector4d(26/64., 50/64., 1, 30/32.)),
// post front
new Quad(new Vector3d(7/16., 0, 9/16.), new Vector3d(9/16., 0, 9/16.),
new Vector3d(7/16., .5, 9/16.), new Vector4d(2/64., 4/64., 2/32., 16/32.)),
// post back
new Quad(new Vector3d(9/16., 0, 7/16.), new Vector3d(7/16., 0, 7/16.),
new Vector3d(9/16., .5, 7/16.), new Vector4d(4/64., 6/64., 2/32., 16/32.)),
// post left
new Quad(new Vector3d(7/16., 0, 7/16.), new Vector3d(7/16., 0, 9/16.),
new Vector3d(7/16., .5, 7/16.), new Vector4d(0, 2/64., 2/32., 16/32.)),
// post right
new Quad(new Vector3d(9/16., 0, 9/16.), new Vector3d(9/16., 0, 7/16.),
new Vector3d(9/16., .5, 9/16.), new Vector4d(6/64., 8/64., 2/32., 16/32.)),
// post bottom
new Quad(new Vector3d(7/16., 0, 7/16.), new Vector3d(9/16., 0, 7/16.),
new Vector3d(7/16., 0, 9/16.), new Vector4d(4/64., 6/64., 16/32., 18/32.)),
};
private static final Quad[][] rot = new Quad[16][];
static {
// rotate the sign post to face the correct direction
rot[0] = sides;
for (int i = 1; i < 16; ++i) {
rot[i] = Model.rotateY(sides, - i * Math.PI/8);
}
}
@SuppressWarnings("javadoc")
public static boolean intersect(Ray ray) {
boolean hit = false;
int angle = ray.getBlockData() & 0xF;
ray.t = Double.POSITIVE_INFINITY;
for (int i = 0; i < sides.length; ++i) {
Quad side = rot[angle][i];
if (side.intersect(ray)) {
Texture.signPost.getColor(ray);
ray.n.set(side.n);
ray.t = ray.tNear;
hit = true;
}
}
if (hit) {
ray.color.w = 1;
ray.distance += ray.t;
ray.x.scaleAdd(ray.t, ray.d, ray.x);
}
return hit;
}
}