155 lines
6.4 KiB
Java
155 lines
6.4 KiB
Java
/*
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* Minecraft Forge
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* Copyright (c) 2016-2019.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package net.minecraftforge.debug.block;
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import java.util.List;
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import net.minecraft.block.Block;
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import net.minecraft.block.BlockState;
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import net.minecraft.block.Blocks;
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import net.minecraft.block.PistonBlock;
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import net.minecraft.block.material.Material;
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import net.minecraft.block.state.PistonBlockStructureHelper;
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import net.minecraft.client.Minecraft;
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import net.minecraft.entity.player.PlayerEntity;
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import net.minecraft.item.BlockItem;
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import net.minecraft.item.Item;
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import net.minecraft.item.ItemGroup;
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import net.minecraft.util.Direction;
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import net.minecraft.util.ResourceLocation;
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import net.minecraft.util.math.BlockPos;
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import net.minecraft.util.text.StringTextComponent;
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import net.minecraft.world.World;
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import net.minecraftforge.event.RegistryEvent;
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import net.minecraftforge.event.world.PistonEvent;
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import net.minecraftforge.event.world.PistonEvent.PistonMoveType;
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import net.minecraftforge.eventbus.api.SubscribeEvent;
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import net.minecraftforge.fml.common.Mod;
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/**
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* This test mod blocks pistons from moving cobblestone at all except indirectly
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* This test mod adds a block that moves upwards when pushed by a piston
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* This test mod informs the user what will happen the piston and affected blocks when changes are made
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* This test mod makes black wool pushed by a piston drop after being pushed.
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*/
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@Mod.EventBusSubscriber(modid = PistonEventTest.MODID)
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@Mod(value = PistonEventTest.MODID)
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public class PistonEventTest
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{
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public static final String MODID = "piston_event_test";
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private static Block shiftOnMove = new BlockShiftOnMove();
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@SubscribeEvent
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public static void regItem(RegistryEvent.Register<Item> event)
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{
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event.getRegistry().register(new BlockItem(shiftOnMove, new Item.Properties().group(ItemGroup.BUILDING_BLOCKS)).setRegistryName(shiftOnMove.getRegistryName()));
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}
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@SubscribeEvent
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public static void regBlock(RegistryEvent.Register<Block> event)
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{
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event.getRegistry().register(shiftOnMove);
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}
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@SubscribeEvent
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public static void pistonPre(PistonEvent.Pre event)
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{
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if (event.getPistonMoveType() == PistonMoveType.EXTEND)
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{
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World world = (World) event.getWorld();
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PistonBlockStructureHelper pistonHelper = event.getStructureHelper();
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if (world.isRemote)
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{
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PlayerEntity player = Minecraft.getInstance().player;
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if (pistonHelper.canMove())
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{
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player.sendMessage(new StringTextComponent(String.format("Piston will extend moving %d blocks and destroy %d blocks", pistonHelper.getBlocksToMove().size(), pistonHelper.getBlocksToDestroy().size())));
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}
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else
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{
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player.sendMessage(new StringTextComponent("Piston won't extend"));
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}
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}
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if (pistonHelper.canMove())
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{
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List<BlockPos> posList = pistonHelper.getBlocksToMove();
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for (BlockPos newPos : posList)
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{
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BlockState state = event.getWorld().getBlockState(newPos);
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if (state.getBlock() == Blocks.BLACK_WOOL)
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{
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Block.spawnDrops(state, world, newPos);
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world.setBlockState(newPos, Blocks.AIR.getDefaultState());
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}
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}
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}
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// Make the block move up and out of the way so long as it won't replace the piston
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BlockPos pushedBlockPos = event.getFaceOffsetPos();
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if (world.getBlockState(pushedBlockPos).getBlock() == shiftOnMove && event.getDirection() != Direction.DOWN)
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{
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world.setBlockState(pushedBlockPos, Blocks.AIR.getDefaultState());
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world.setBlockState(pushedBlockPos.up(), shiftOnMove.getDefaultState());
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}
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// Block pushing cobblestone (directly, indirectly works)
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event.setCanceled(event.getWorld().getBlockState(event.getFaceOffsetPos()).getBlock() == Blocks.COBBLESTONE);
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}
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else
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{
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boolean isSticky = event.getWorld().getBlockState(event.getPos()).getBlock() == Blocks.STICKY_PISTON;
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if (event.getWorld().isRemote())
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{
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PlayerEntity player = Minecraft.getInstance().player;
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if (isSticky)
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{
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BlockPos targetPos = event.getFaceOffsetPos().offset(event.getDirection());
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boolean canPush = PistonBlock.canPush(event.getWorld().getBlockState(targetPos), (World) event.getWorld(), event.getFaceOffsetPos(), event.getDirection().getOpposite(), false, event.getDirection());
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boolean isAir = event.getWorld().isAirBlock(targetPos);
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player.sendMessage(new StringTextComponent(String.format("Piston will retract moving %d blocks", !isAir && canPush ? 1 : 0)));
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}
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else
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{
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player.sendMessage(new StringTextComponent("Piston will retract"));
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}
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}
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// Offset twice to see if retraction will pull cobblestone
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event.setCanceled(event.getWorld().getBlockState(event.getFaceOffsetPos().offset(event.getDirection())).getBlock() == Blocks.COBBLESTONE && isSticky);
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}
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}
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public static class BlockShiftOnMove extends Block
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{
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public static String blockName = "shiftonmove";
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public static ResourceLocation blockId = new ResourceLocation(MODID, blockName);
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public BlockShiftOnMove()
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{
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super(Block.Properties.create(Material.ROCK));
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this.setRegistryName(blockId);
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}
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}
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}
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