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Minecraft mapping and rendering tool

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/* Copyright (c) 2012-2014 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;

import se.llbit.chunky.map.WorldMapLoader;
import se.llbit.log.Log;

/**
 * Parses regions
 *
 * @author Jesper Öqvist ([email protected])
 */
public class RegionParser extends Thread {

  private final WorldMapLoader mapLoader;
  private final RegionQueue queue;

  /**
   * Create new region parser
   */
  public RegionParser(WorldMapLoader loader, RegionQueue queue) {
    super("Region Parser");
    this.mapLoader = loader;
    this.queue = queue;
  }

  @Override public void run() {
    while (!isInterrupted()) {
      ChunkPosition position = queue.poll();
      if (position == null) {
        Log.warn("Region parser shutting down abnormally.");
        return;
      }
      ChunkView map = mapLoader.getMapView();
      ChunkView minimap = mapLoader.getMinimapView();
      if (map.isRegionVisible(position) || minimap.isRegionVisible(position)) {
        Region region = mapLoader.getWorld().getRegion(position);
        region.parse();
        for (Chunk chunk : region) {
          if (map.shouldPreload(chunk)) {
            chunk.loadChunk(mapLoader);
          }
        }
      }
    }
  }
}