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

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Minecraft mapping and rendering tool
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/* Copyright (c) 2012-2015 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.chunky.world.BlockData;
import se.llbit.math.DoubleSidedQuad;
import se.llbit.math.Quad;
import se.llbit.math.QuickMath;
import se.llbit.math.Ray;
import se.llbit.math.Vector3;
import se.llbit.math.Vector4;

public class IronBarsModel {

  private static Quad[] core =
      {new DoubleSidedQuad(new Vector3(.5, 1, 7 / 16.), new Vector3(.5, 1, 9 / 16.),
          new Vector3(.5, 0, 7 / 16.), new Vector4(7 / 16., 9 / 16., 1, 0)),

          new DoubleSidedQuad(new Vector3(7 / 16., 1, .5), new Vector3(9 / 16., 1, .5),
              new Vector3(7 / 16., 0, .5), new Vector4(7 / 16., 9 / 16., 1, 0)),};


  private static Quad[] coreTop = {
      // Top face.
      new DoubleSidedQuad(new Vector3(9 / 16., 1, 7 / 16.), new Vector3(7 / 16., 1, 7 / 16.),
          new Vector3(9 / 16., 1, 9 / 16.), new Vector4(9 / 16., 7 / 16., 7 / 16., 9 / 16.)),

      // Bottom face.
      new DoubleSidedQuad(new Vector3(7 / 16., 0, 7 / 16.), new Vector3(9 / 16., 0, 7 / 16.),
          new Vector3(7 / 16., 0, 9 / 16.), new Vector4(7 / 16., 9 / 16., 7 / 16., 9 / 16.)),};

  private static Quad[][] connector = {
      // Front side.
      {
          // Center face.
          new DoubleSidedQuad(new Vector3(.5, 1, .5), new Vector3(.5, 1, 0),
              new Vector3(.5, 0, .5), new Vector4(.5, 0, 1, 0)),

          // Top face.
          new DoubleSidedQuad(new Vector3(9 / 16., 1, 0), new Vector3(7 / 16., 1, 0),
              new Vector3(9 / 16., 1, 7 / 16.), new Vector4(9 / 16., 7 / 16., 0, 7 / 16.)),

          // Bottom face.
          new DoubleSidedQuad(new Vector3(7 / 16., 0, 0), new Vector3(9 / 16., 0, 0),
              new Vector3(7 / 16., 0, 7 / 16.), new Vector4(7 / 16., 9 / 16., 0, 7 / 16.)),

      },
      // Back side.
      {
          // Center face.
          new DoubleSidedQuad(new Vector3(.5, 1, 1), new Vector3(.5, 1, .5),
              new Vector3(.5, 0, 1), new Vector4(1, .5, 1, 0)),

          // Top face.
          new DoubleSidedQuad(new Vector3(9 / 16., 1, 9 / 16.), new Vector3(7 / 16., 1, 9 / 16.),
              new Vector3(9 / 16., 1, 1), new Vector4(9 / 16., 7 / 16., 9 / 16., 1)),

          // Bottom face.
          new DoubleSidedQuad(new Vector3(7 / 16., 0, 9 / 16.), new Vector3(9 / 16., 0, 9 / 16.),
              new Vector3(7 / 16., 0, 1), new Vector4(7 / 16., 9 / 16., 9 / 16., 1)),},};

  private static Quad[][] panes = new Quad[4][];

  static {
    panes[0] = connector[0];
    panes[1] = connector[1];
    for (int j = 2; j < 4; ++j) {
      panes[j] = Model.rotateY(connector[j - 2]);
    }
  }

  public static boolean intersect(Ray ray) {
    int metadata = 0xF & (ray.getCurrentData() >> BlockData.GLASS_PANE_OFFSET);
    boolean hit = false;
    ray.t = Double.POSITIVE_INFINITY;
    if (metadata == 0) {
      for (Quad quad : core) {
        if (quad.intersect(ray)) {
          Texture.ironBars.getColor(ray);
          if (ray.color.w > 0) {
            ray.n.set(quad.n);
            ray.n.scale(QuickMath.signum(-ray.d.dot(quad.n)));
            ray.t = ray.tNext;
            hit = true;
          }
        }
      }
    }
    for (Quad quad : coreTop) {
      if (quad.intersect(ray)) {
        Texture.ironBars.getColor(ray);
        if (ray.color.w > 0) {
          ray.n.set(quad.n);
          ray.n.scale(QuickMath.signum(-ray.d.dot(quad.n)));
          ray.t = ray.tNext;
          hit = true;
        }
      }
    }
    for (int i = 0; i < 4; ++i) {
      if ((metadata & (1 << i)) != 0) {
        for (int j = 0; j < panes[i].length; ++j) {
          Quad quad = panes[i][j];
          if (quad.intersect(ray)) {
            Texture.ironBars.getColor(ray);
            if (ray.color.w > 0) {
              ray.n.set(quad.n);
              ray.n.scale(QuickMath.signum(-ray.d.dot(quad.n)));
              ray.t = ray.tNext;
              hit = true;
            }
          }
        }
      }
    }
    if (hit) {
      ray.distance += ray.t;
      ray.o.scaleAdd(ray.t, ray.d);
    }
    return hit;
  }
}