Java tutorial
/* * This file ("ItemFillingWand.java") is part of the Actually Additions mod for Minecraft. * It is created and owned by Ellpeck and distributed * under the Actually Additions License to be found at * http://ellpeck.de/actaddlicense * View the source code at https://github.com/Ellpeck/ActuallyAdditions * * 2015-2017 Ellpeck */ package de.ellpeck.actuallyadditions.mod.items; import java.util.List; import org.apache.commons.lang3.tuple.Pair; import de.ellpeck.actuallyadditions.mod.ActuallyAdditions; import de.ellpeck.actuallyadditions.mod.items.base.ItemEnergy; import de.ellpeck.actuallyadditions.mod.util.StackUtil; import de.ellpeck.actuallyadditions.mod.util.StringUtil; import de.ellpeck.actuallyadditions.mod.util.WorldUtil; import net.minecraft.block.Block; import net.minecraft.block.SoundType; import net.minecraft.block.state.IBlockState; import net.minecraft.client.util.ITooltipFlag; import net.minecraft.entity.Entity; import net.minecraft.entity.EntityLivingBase; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.item.EnumRarity; import net.minecraft.item.ItemStack; import net.minecraft.nbt.NBTTagCompound; import net.minecraft.util.EnumActionResult; import net.minecraft.util.EnumFacing; import net.minecraft.util.EnumHand; import net.minecraft.util.SoundCategory; import net.minecraft.util.math.BlockPos; import net.minecraft.util.math.RayTraceResult; import net.minecraft.util.math.Vec3d; import net.minecraft.world.World; public class ItemFillingWand extends ItemEnergy { public ItemFillingWand(String name) { super(500000, 1000, name); } private static boolean removeFittingItem(IBlockState state, EntityPlayer player) { Block block = state.getBlock(); ItemStack stack = new ItemStack(block, 1, block.damageDropped(state)); if (StackUtil.isValid(stack)) { for (int i = 0; i < player.inventory.getSizeInventory(); i++) { ItemStack slot = player.inventory.getStackInSlot(i); if (StackUtil.isValid(slot) && slot.isItemEqual(stack)) { slot.shrink(1); if (!StackUtil.isValid(slot)) { player.inventory.setInventorySlotContents(i, StackUtil.getEmpty()); } return true; } } } return false; } private static void saveData(ItemStack pickBlock, IBlockState state, ItemStack wand) { if (!wand.hasTagCompound()) wand.setTagCompound(new NBTTagCompound()); wand.getTagCompound().setInteger("state", Block.getStateId(state)); wand.getTagCompound().setString("name", pickBlock.getDisplayName()); } private static Pair<IBlockState, String> loadData(ItemStack stack) { if (stack.hasTagCompound()) return Pair.of(Block.getStateById(stack.getTagCompound().getInteger("state")), stack.getTagCompound().getString("name")); return null; } @Override public EnumActionResult onItemUse(EntityPlayer player, World world, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) { ItemStack stack = player.getHeldItem(hand); if (!world.isRemote && player.getItemInUseCount() <= 0) { if (player.isSneaking()) { IBlockState state = world.getBlockState(pos); ItemStack pick = state.getBlock().getPickBlock(state, world.rayTraceBlocks(player.getPositionVector(), new Vec3d(pos.getX() + hitX, pos.getY() + hitY, pos.getZ() + hitZ)), world, pos, player); saveData(pick, state, stack); return EnumActionResult.SUCCESS; } else if (loadData(stack) != null) { if (!stack.hasTagCompound()) { stack.setTagCompound(new NBTTagCompound()); } NBTTagCompound compound = stack.getTagCompound(); if (compound.getInteger("CurrX") == 0 && compound.getInteger("CurrY") == 0 && compound.getInteger("CurrZ") == 0) { compound.setInteger("FirstX", pos.getX()); compound.setInteger("FirstY", pos.getY()); compound.setInteger("FirstZ", pos.getZ()); player.setActiveHand(hand); return EnumActionResult.SUCCESS; } } } return EnumActionResult.PASS; } @Override public void onPlayerStoppedUsing(ItemStack stack, World world, EntityLivingBase entity, int timeLeft) { if (!world.isRemote) { boolean clear = true; if (entity instanceof EntityPlayer) { RayTraceResult result = WorldUtil.getNearestBlockWithDefaultReachDistance(world, (EntityPlayer) entity); if (result != null && result.getBlockPos() != null) { if (!stack.hasTagCompound()) { stack.setTagCompound(new NBTTagCompound()); } NBTTagCompound compound = stack.getTagCompound(); BlockPos pos = result.getBlockPos(); compound.setInteger("SecondX", pos.getX()); compound.setInteger("SecondY", pos.getY()); compound.setInteger("SecondZ", pos.getZ()); clear = false; } } if (clear) { ItemPhantomConnector.clearStorage(stack, "FirstX", "FirstY", "FirstZ"); } } super.onPlayerStoppedUsing(stack, world, entity, timeLeft); } @Override public void onUpdate(ItemStack stack, World world, Entity entity, int itemSlot, boolean isSelected) { super.onUpdate(stack, world, entity, itemSlot, isSelected); if (!world.isRemote) { boolean shouldClear = false; if (isSelected) { if (entity instanceof EntityPlayer && stack.hasTagCompound()) { EntityPlayer player = (EntityPlayer) entity; boolean creative = player.capabilities.isCreativeMode; NBTTagCompound compound = stack.getTagCompound(); BlockPos firstPos = new BlockPos(compound.getInteger("FirstX"), compound.getInteger("FirstY"), compound.getInteger("FirstZ")); BlockPos secondPos = new BlockPos(compound.getInteger("SecondX"), compound.getInteger("SecondY"), compound.getInteger("SecondZ")); if (!BlockPos.ORIGIN.equals(firstPos) && !BlockPos.ORIGIN.equals(secondPos)) { int energyUse = 1500; Pair<IBlockState, String> data = loadData(stack); if (data != null && (creative || this.getEnergyStored(stack) >= energyUse)) { IBlockState replaceState = data.getLeft(); int lowestX = Math.min(firstPos.getX(), secondPos.getX()); int lowestY = Math.min(firstPos.getY(), secondPos.getY()); int lowestZ = Math.min(firstPos.getZ(), secondPos.getZ()); int currX = compound.getInteger("CurrX"); int currY = compound.getInteger("CurrY"); int currZ = compound.getInteger("CurrZ"); BlockPos pos = new BlockPos(lowestX + currX, lowestY + currY, lowestZ + currZ); IBlockState state = world.getBlockState(pos); if (state.getBlock().isReplaceable(world, pos) && replaceState.getBlock().canPlaceBlockAt(world, pos)) { if (creative || removeFittingItem(replaceState, player)) { world.setBlockState(pos, replaceState, 2); SoundType sound = replaceState.getBlock().getSoundType(replaceState, world, pos, player); world.playSound(null, pos, sound.getPlaceSound(), SoundCategory.BLOCKS, sound.getVolume() / 2F + .5F, sound.getPitch() * 0.8F); if (!creative) { this.extractEnergyInternal(stack, energyUse, false); } } else { shouldClear = true; } } int distX = Math.abs(secondPos.getX() - firstPos.getX()); int distY = Math.abs(secondPos.getY() - firstPos.getY()); int distZ = Math.abs(secondPos.getZ() - firstPos.getZ()); currX++; if (currX > distX) { currX = 0; currY++; if (currY > distY) { currY = 0; currZ++; if (currZ > distZ) { shouldClear = true; } } } if (!shouldClear) { compound.setInteger("CurrX", currX); compound.setInteger("CurrY", currY); compound.setInteger("CurrZ", currZ); } } else { shouldClear = true; } } } } else { shouldClear = true; } if (shouldClear) { ItemPhantomConnector.clearStorage(stack, "FirstX", "FirstY", "FirstZ", "SecondX", "SecondY", "SecondZ", "CurrX", "CurrY", "CurrZ"); } } } @Override public void addInformation(ItemStack stack, World playerIn, List<String> tooltip, ITooltipFlag advanced) { super.addInformation(stack, playerIn, tooltip, advanced); String display = StringUtil .localize("tooltip." + ActuallyAdditions.MODID + ".item_filling_wand.selectedBlock.none"); Pair<IBlockState, String> data = loadData(stack); if (data != null) { display = data.getRight(); } tooltip.add(String.format("%s: %s", StringUtil.localize("tooltip." + ActuallyAdditions.MODID + ".item_filling_wand.selectedBlock"), display)); } @Override public int getMaxItemUseDuration(ItemStack stack) { return Integer.MAX_VALUE; } @Override public EnumRarity getRarity(ItemStack stack) { return EnumRarity.EPIC; } }