/* 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;
/**
* Piston
*
* @author Jesper Öqvist <jesper@llbit.se>
*/
public class PistonExtensionModel {
protected static Quad[][] extension = {
// down
{},
// up
{},
// facing north
{
// north
new Quad(new Vector3d(1, 0, 0), new Vector3d(0, 0, 0),
new Vector3d(1, 1, 0), new Vector4d(1, 0, 0, 1)),
// south
new Quad(new Vector3d(0, 0, .25), new Vector3d(1, 0, .25),
new Vector3d(0, 1, .25), new Vector4d(0, 1, 0, 1)),
// west
new Quad(new Vector3d(0, 1, 0), new Vector3d(0, 0, 0),
new Vector3d(0, 1, .25), new Vector4d(0, 1, 1, .75)),
// east
new Quad(new Vector3d(1, 1, .25), new Vector3d(1, 0, .25),
new Vector3d(1, 1, 0), new Vector4d(1, 0, .75, 1)),
// top
new Quad(new Vector3d(1, 1, 0), new Vector3d(0, 1, 0),
new Vector3d(1, 1, .25), new Vector4d(1, 0, 1, .75)),
// bottom
new Quad(new Vector3d(0, 0, 0), new Vector3d(1, 0, 0),
new Vector3d(0, 0, .25), new Vector4d(0, 1, 1, .75)),
// extension west
new Quad(new Vector3d(.375, .375, .25), new Vector3d(.375, .375, 1),
new Vector3d(.375, .625, .25), new Vector4d(1, .25, .75, 1)),
// extension east
new Quad(new Vector3d(.625, .375, 1), new Vector3d(.625, .375, .25),
new Vector3d(.625, .625, 1), new Vector4d(.25, 1, .75, 1)),
// extension top
new Quad(new Vector3d(.375, .625, .25), new Vector3d(.375, .625, 1),
new Vector3d(.625, .625, .25), new Vector4d(1, .25, .75, 1)),
// extension bottom
new Quad(new Vector3d(.375, .375, 1), new Vector3d(.375, .375, .25),
new Vector3d(.625, .375, 1), new Vector4d(.25, 1, .75, 1)),
},
// facing south
{},
//facing west
{},
// facing east
{},
};
static {
extension[0] = Model.rotateNegX(extension[2]);
extension[1] = Model.rotateX(extension[2]);
extension[5] = Model.rotateY(extension[2]);
extension[3] = Model.rotateY(extension[5]);
extension[4] = Model.rotateY(extension[3]);
}
static final Texture[][] texture = {
{
Texture.pistonTop,
Texture.pistonTop,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
},
{
Texture.pistonTopSticky,
Texture.pistonTop,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
Texture.pistonSide,
},
};
@SuppressWarnings("javadoc")
public static boolean intersect(Ray ray) {
boolean hit = false;
int isSticky = ray.getBlockData() >> 3;
Quad[] rot = extension[(ray.getBlockData() & 7) % 6];
ray.t = Double.POSITIVE_INFINITY;
for (int i = 0; i < rot.length; ++i) {
Quad side = rot[i];
if (side.intersect(ray)) {
texture[isSticky][i].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;
}
}