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Minecraft mapping and rendering tool

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/* Copyright (c) 2012 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.world;

/**
 * Chunk heightmap.
 * This class actually has a misleading name since it stores
 * height values for a two by two square of chunks.
 *
 * @author Jesper Öqvist 
 */
public class ChunkHeightmap {

  short[] data = new short[4 * Chunk.X_MAX * Chunk.Z_MAX];

  /**
   * Create new heightmap
   */
  public ChunkHeightmap() {
    for (int i = 0; i < (Chunk.X_MAX * Chunk.Z_MAX); ++i)
      data[i] = World.SEA_LEVEL;
  }

  /**
   * Set height value at (x, z).
   *
   * @param y new height value
   */
  public void set(int y, int x, int z) {
    data[x + 2 * z * Chunk.X_MAX] = (short) y;
  }

  /**
   * @return Height at (x, z)
   */
  public int get(int x, int z) {
    return data[x + 2 * z * Chunk.X_MAX];
  }

}