mirror of
https://github.com/plexusorg/Plex-FAWE.git
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283 lines
9.6 KiB
Java
283 lines
9.6 KiB
Java
/*
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* WorldEdit, a Minecraft world manipulation toolkit
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* Copyright (C) sk89q <http://www.sk89q.com>
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* Copyright (C) WorldEdit team and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.world.chunk;
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import com.fastasyncworldedit.core.util.NbtUtils;
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import com.sk89q.jnbt.CompoundTag;
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import com.sk89q.worldedit.WorldEdit;
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import com.sk89q.worldedit.math.BlockVector3;
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import com.sk89q.worldedit.util.nbt.BinaryTag;
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import com.sk89q.worldedit.util.nbt.BinaryTagTypes;
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import com.sk89q.worldedit.util.nbt.CompoundBinaryTag;
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import com.sk89q.worldedit.util.nbt.IntBinaryTag;
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import com.sk89q.worldedit.util.nbt.ListBinaryTag;
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import com.sk89q.worldedit.world.DataException;
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import com.sk89q.worldedit.world.block.BaseBlock;
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import com.sk89q.worldedit.world.block.BlockState;
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import com.sk89q.worldedit.world.block.BlockTypes;
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import com.sk89q.worldedit.world.registry.LegacyMapper;
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import com.sk89q.worldedit.world.storage.InvalidFormatException;
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import javax.annotation.Nullable;
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import java.util.HashMap;
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import java.util.Map;
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public class AnvilChunk implements Chunk {
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private final CompoundBinaryTag rootTag;
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private final byte[][] blocks;
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private final byte[][] blocksAdd;
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private final byte[][] data;
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private final int rootX;
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private final int rootZ;
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private Map<BlockVector3, CompoundBinaryTag> tileEntities;
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/**
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* Construct the chunk with a compound tag.
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*
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* @param tag the tag to read
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* @throws DataException on a data error
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* @deprecated Use {@link #AnvilChunk(CompoundBinaryTag)}
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*/
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@Deprecated
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public AnvilChunk(CompoundTag tag) throws DataException {
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this(tag.asBinaryTag());
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}
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/**
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* Construct the chunk with a compound tag.
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*
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* @param tag the tag to read
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* @throws DataException on a data error
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*/
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public AnvilChunk(CompoundBinaryTag tag) throws DataException {
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rootTag = tag;
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rootX = NbtUtils.getChildTag(rootTag, "xPos", BinaryTagTypes.INT).value();
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rootZ = NbtUtils.getChildTag(rootTag, "zPos", BinaryTagTypes.INT).value();
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blocks = new byte[16][16 * 16 * 16];
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blocksAdd = new byte[16][16 * 16 * 8];
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data = new byte[16][16 * 16 * 8];
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ListBinaryTag sections = NbtUtils.getChildTag(rootTag, "Sections", BinaryTagTypes.LIST);
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for (BinaryTag rawSectionTag : sections) {
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if (!(rawSectionTag instanceof CompoundBinaryTag)) {
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continue;
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}
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CompoundBinaryTag sectionTag = (CompoundBinaryTag) rawSectionTag;
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if (sectionTag.get("Y") == null) {
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continue; // Empty section.
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}
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int y = NbtUtils.getChildTag(sectionTag, "Y", BinaryTagTypes.BYTE).value();
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if (y < 0 || y >= 16) {
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continue;
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}
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blocks[y] = NbtUtils.getChildTag(sectionTag,
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"Blocks", BinaryTagTypes.BYTE_ARRAY
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).value();
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data[y] = NbtUtils.getChildTag(sectionTag, "Data",
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BinaryTagTypes.BYTE_ARRAY
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).value();
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// 4096 ID block support
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if (sectionTag.get("Add") != null) {
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blocksAdd[y] = NbtUtils.getChildTag(sectionTag,
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"Add", BinaryTagTypes.BYTE_ARRAY
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).value();
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}
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}
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int sectionsize = 16 * 16 * 16;
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for (byte[] block : blocks) {
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if (block.length != sectionsize) {
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throw new InvalidFormatException(
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"Chunk blocks byte array expected " + "to be "
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+ sectionsize + " bytes; found "
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+ block.length);
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}
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}
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for (byte[] aData : data) {
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if (aData.length != (sectionsize / 2)) {
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throw new InvalidFormatException("Chunk block data byte array "
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+ "expected to be " + sectionsize + " bytes; found "
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+ aData.length);
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}
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}
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}
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private int getBlockID(BlockVector3 position) throws DataException {
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int x = position.getX() - rootX * 16;
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int y = position.getY();
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int z = position.getZ() - rootZ * 16;
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int section = y >> 4;
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if (section < 0 || section >= blocks.length) {
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throw new DataException("Chunk does not contain position " + position);
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}
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int yindex = y & 0x0F;
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int index = x + (z * 16 + (yindex * 16 * 16));
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try {
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int addId = 0;
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// The block ID is the combination of the Blocks byte array with the
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// Add byte array. 'Blocks' stores the lowest 8 bits of a block's ID, and
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// 'Add' stores the highest 4 bits of the ID. The first block is stored
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// in the lowest nibble in the Add byte array.
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if (index % 2 == 0) {
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addId = (blocksAdd[section][index >> 1] & 0x0F) << 8;
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} else {
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addId = (blocksAdd[section][index >> 1] & 0xF0) << 4;
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}
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return (blocks[section][index] & 0xFF) + addId;
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} catch (IndexOutOfBoundsException e) {
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throw new DataException("Chunk does not contain position " + position);
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}
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}
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private int getBlockData(BlockVector3 position) throws DataException {
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int x = position.getX() - rootX * 16;
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int y = position.getY();
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int z = position.getZ() - rootZ * 16;
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int section = y >> 4;
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int yIndex = y & 0x0F;
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if (section < 0 || section >= blocks.length) {
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throw new DataException("Chunk does not contain position " + position);
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}
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int index = x + (z * 16 + (yIndex * 16 * 16));
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boolean shift = index % 2 == 0;
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index /= 2;
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try {
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if (!shift) {
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return (data[section][index] & 0xF0) >> 4;
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} else {
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return data[section][index] & 0xF;
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}
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} catch (IndexOutOfBoundsException e) {
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throw new DataException("Chunk does not contain position " + position);
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}
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}
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/**
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* Used to load the tile entities.
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*/
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private void populateTileEntities() throws DataException {
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ListBinaryTag tags = NbtUtils.getChildTag(rootTag, "TileEntities", BinaryTagTypes.LIST);
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tileEntities = new HashMap<>();
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for (BinaryTag tag : tags) {
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if (!(tag instanceof CompoundBinaryTag)) {
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throw new InvalidFormatException("CompoundTag expected in TileEntities");
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}
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CompoundBinaryTag t = (CompoundBinaryTag) tag;
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int x = 0;
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int y = 0;
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int z = 0;
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CompoundBinaryTag.Builder values = CompoundBinaryTag.builder();
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for (String key : t.keySet()) {
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BinaryTag value = t.get(key);
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switch (key) {
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case "x":
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if (value instanceof IntBinaryTag) {
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x = ((IntBinaryTag) value).value();
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}
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break;
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case "y":
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if (value instanceof IntBinaryTag) {
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y = ((IntBinaryTag) value).value();
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}
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break;
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case "z":
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if (value instanceof IntBinaryTag) {
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z = ((IntBinaryTag) value).value();
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}
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break;
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default:
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break;
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}
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values.put(key, value);
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}
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BlockVector3 vec = BlockVector3.at(x, y, z);
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tileEntities.put(vec, values.build());
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}
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}
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/**
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* Get the map of tags keyed to strings for a block's tile entity data. May
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* return null if there is no tile entity data. Not public yet because
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* what this function returns isn't ideal for usage.
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*
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* @param position the position
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* @return the compound tag for that position, which may be null
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* @throws DataException thrown if there is a data error
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*/
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@Nullable
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private CompoundBinaryTag getBlockTileEntity(BlockVector3 position) throws DataException {
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if (tileEntities == null) {
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populateTileEntities();
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}
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CompoundBinaryTag values = tileEntities.get(position);
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return values;
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}
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@Override
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public BaseBlock getBlock(BlockVector3 position) throws DataException {
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int id = getBlockID(position);
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int data = getBlockData(position);
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BlockState state = LegacyMapper.getInstance().getBlockFromLegacy(id, data);
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if (state == null) {
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WorldEdit.logger.warn("Unknown legacy block " + id + ":" + data + " found when loading legacy anvil chunk.");
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return BlockTypes.AIR.getDefaultState().toBaseBlock();
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}
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CompoundBinaryTag tileEntity = getBlockTileEntity(position);
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if (tileEntity != null) {
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return state.toBaseBlock(tileEntity);
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}
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return state.toBaseBlock();
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}
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}
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