MixinEntityFallingBlock_HeightLimits.java

/*
 *  This file is part of Cubic Chunks Mod, licensed under the MIT License (MIT).
 *
 *  Copyright (c) 2015 contributors
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
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 *  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
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 */
package cubicchunks.asm.mixin.fixes.common;

import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityFallingBlock;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;

import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Redirect;

import cubicchunks.asm.MixinUtils;

import static cubicchunks.asm.JvmNames.BLOCK_POS_GETY;

@Mixin(EntityFallingBlock.class)
public abstract class MixinEntityFallingBlock_HeightLimits extends Entity {

	//to make javac happy
	public MixinEntityFallingBlock_HeightLimits(World worldIn) {
		super(worldIn);
	}

	/**
	 * Fixes the following code:
	 * <p>
	 * else if (this.fallTime > 100 && !this.worldObj.isRemote && (blockpos1.getY() < 1 || blockpos1.getY() > 256) ||
	 * this.fallTime > 600)
	 */
	@Redirect(method = "onUpdate", at = @At(value = "INVOKE", target = BLOCK_POS_GETY), require = 2)
	private int checkHeightYReplace(BlockPos pos) {
		return MixinUtils.getReplacementY(world, pos);
	}
}