net.malisis.core.util.BlockPosUtils Maven / Gradle / Ivy

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MalisisCore is a framework dedicated to simplify many processes required during a mod development.
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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Ordinastie
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package net.malisis.core.util;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;

/**
 * Utility class to handle different interactions with {@link BlockPos}.
 *
 * @author Ordinastie
 *
 */
public class BlockPosUtils
{
	/**
	 * Rotates the {@link BlockPos} around the Y axis around the origin (0,0,0).
	 *
	 * @param pos the pos
	 * @param rotation the rotation
	 * @return the block pos
	 */
	public static BlockPos rotate(BlockPos pos, int rotation)
	{
		int[] cos = { 1, 0, -1, 0 };
		int[] sin = { 0, 1, 0, -1 };

		int a = -rotation & 3;

		int newX = (pos.getX() * cos[a]) - (pos.getZ() * sin[a]);
		int newZ = (pos.getX() * sin[a]) + (pos.getZ() * cos[a]);

		return new BlockPos(newX, pos.getY(), newZ);
	}

	/**
	 * Converts the {@link BlockPos} to its position relative to the chunk it's in.
	 *
	 * @param pos the pos
	 * @return the block pos
	 */
	public static BlockPos chunkPosition(BlockPos pos)
	{
		return new BlockPos(pos.getX() - (pos.getX() >> 4) * 16, pos.getY() - (pos.getY() >> 4) * 16, pos.getZ() - (pos.getZ() >> 4) * 16);
	}

	/**
	 * Gets an iterable iterating through all the {@link BlockPos} intersecting the passed {@link AxisAlignedBB}.
	 *
	 * @param aabb the aabb
	 * @return the all in box
	 */
	public static Iterable getAllInBox(AxisAlignedBB aabb)
	{
		return BlockPos.getAllInBox(new BlockPos(aabb.minX, aabb.minY, aabb.minZ),
				new BlockPos(Math.ceil(aabb.maxX) - 1, Math.ceil(aabb.maxY) - 1, Math.ceil(aabb.maxZ) - 1));
	}

	public static ByteBuf toBytes(BlockPos pos)
	{
		ByteBuf buf = Unpooled.buffer(8);
		buf.writeLong(pos.toLong());
		return buf;
	}

	public static BlockPos fromBytes(ByteBuf buf)
	{
		return BlockPos.fromLong(buf.readLong());
	}

	/**
	 * Compares the distance of the passed {@link BlockPos} to the origin (0,0,0).
	 *
	 * @param pos1 the pos 1
	 * @param pos2 the pos 2
	 * @return the int
	 */
	public static int compare(BlockPos pos1, BlockPos pos2)
	{
		return compare(new Point(0, 0, 0), pos1, pos2);
	}

	/**
	 * Compares the distance of the passed {@link BlockPos} to the offset {@link Point}.
	 *
	 * @param offset the offset
	 * @param pos1 the pos 1
	 * @param pos2 the pos 2
	 * @return the int
	 */
	public static int compare(Point offset, BlockPos pos1, BlockPos pos2)
	{
		if (pos1.equals(pos2))
			return 0;

		return Double.compare(pos1.distanceSq(offset.x, offset.y, offset.z), pos2.distanceSq(offset.x, offset.y, offset.z));
	}

}