se.llbit.chunky.model.BeaconModel Maven / Gradle / Ivy

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Minecraft mapping and rendering tool

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/* Copyright (c) 2013 Jesper Öqvist 
 *
 * 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 .
 */
package se.llbit.chunky.model;

import se.llbit.chunky.resources.Texture;
import se.llbit.math.AABB;
import se.llbit.math.Ray;

/**
 * Beacon block.
 *
 * @author Jesper Öqvist 
 */
public class BeaconModel {
  private static final AABB[] boxes = {new AABB(0, 1, 0, 1, 0, 1),
      new AABB(3 / 16., 13 / 16., 3 / 16., 13 / 16., 3 / 16., 13 / 16.),
      new AABB(2 / 16., 14 / 16., 0, 3 / 16., 2 / 16., 14 / 16.),};

  private static final Texture[] tex = {Texture.glass, Texture.beacon, Texture.obsidian,};

  /**
   * Find intersection between ray and block.
   *
   * @return true if the ray intersected the block
   */
  public static boolean intersect(Ray ray) {
    boolean hit = false;
    ray.t = Double.POSITIVE_INFINITY;
    for (int i = 0; i < boxes.length; ++i) {
      if (boxes[i].intersect(ray)) {
        float[] color = tex[i].getColor(ray.u, ray.v);
        if (color[3] > Ray.EPSILON) {
          ray.color.set(color);
          ray.t = ray.tNext;
          hit = true;
        }
      }
    }
    if (hit) {
      ray.distance += ray.t;
      ray.o.scaleAdd(ray.t, ray.d);
    }
    return hit;
  }
}