package com.aionemu.gameserver.world;

import com.aionemu.gameserver.configs.main.WorldConfig;

/**
 * @author ATracer
 */
public class RegionUtil {

	public static final int X_3D_OFFSET = 1000000;
	public static final int Y_3D_OFFSET = 1000;
	public static final int X_2D_OFFSET = 1000;

	/**
	 * @param regionSize
	 * @param x
	 * @param y
	 * @return
	 */
	public static final int get2DRegionId(int regionSize, float x, float y) {
		return (int) x / regionSize * X_2D_OFFSET + (int) y / regionSize;
	}

	/**
	 * @param regionSize
	 * @param x
	 * @param y
	 * @param z
	 * @return
	 */
	public static final int get3DRegionId(int regionSize, float x, float y, float z) {
		return (int) x / regionSize * X_3D_OFFSET + (int) y / regionSize * Y_3D_OFFSET + (int) z / regionSize;
	}

	/**
	 * @param x
	 * @param y
	 * @return
	 */
	public static final int get2dRegionId(float x, float y) {
		return get2DRegionId(WorldConfig.WORLD_REGION_SIZE, x, y);
	}

	/**
	 * @param x
	 * @param y
	 * @param z
	 * @return
	 */
	public static final int get3dRegionId(float x, float y, float z) {
		return get3DRegionId(WorldConfig.WORLD_REGION_SIZE, x, y, z);
	}

	/**
	 * @param regionId
	 * @return
	 */
	public static final int getXFrom2dRegionId(int regionId) {
		return regionId / X_2D_OFFSET * WorldConfig.WORLD_REGION_SIZE;
	}

	/**
	 * @param regionId
	 * @return
	 */
	public static final int getYFrom2dRegionId(int regionId) {
		return regionId % X_2D_OFFSET * WorldConfig.WORLD_REGION_SIZE;
	}

	/**
	 * @param regionId
	 * @return
	 */
	public static final int getXFrom3dRegionId(int regionId) {
		return regionId / X_3D_OFFSET * WorldConfig.WORLD_REGION_SIZE;
	}

	/**
	 * @param regionId
	 * @return
	 */
	public static final int getYFrom3dRegionId(int regionId) {
		return regionId % X_3D_OFFSET / Y_3D_OFFSET * WorldConfig.WORLD_REGION_SIZE;
	}

	/**
	 * @param regionId
	 * @return
	 */
	public static final int getZFrom3dRegionId(int regionId) {
		return regionId % X_3D_OFFSET % Y_3D_OFFSET * WorldConfig.WORLD_REGION_SIZE;
	}
}