254 lines
8.1 KiB
Java
254 lines
8.1 KiB
Java
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package de.bluecolored.bluemap.core.mca;
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import de.bluecolored.bluemap.core.logger.Logger;
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import de.bluecolored.bluemap.core.world.Biome;
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import de.bluecolored.bluemap.core.world.BlockState;
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import de.bluecolored.bluemap.core.world.LightData;
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import net.querz.nbt.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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public class ChunkAnvil116 extends MCAChunk {
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private boolean isGenerated;
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private boolean hasLight;
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private int sectionMin, sectionMax;
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private Section[] sections;
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private int[] biomes;
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@SuppressWarnings("unchecked")
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public ChunkAnvil116(CompoundTag chunkTag, boolean ignoreMissingLightData) {
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super(chunkTag);
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CompoundTag levelData = chunkTag.getCompoundTag("Level");
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String status = levelData.getString("Status");
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this.isGenerated = status.equals("full");
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this.hasLight = isGenerated;
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if (!isGenerated && ignoreMissingLightData) {
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isGenerated = !status.equals("empty");
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}
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if (levelData.containsKey("Sections")) {
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this.sectionMin = Integer.MAX_VALUE;
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this.sectionMax = Integer.MIN_VALUE;
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ListTag<CompoundTag> sectionsTag = (ListTag<CompoundTag>) levelData.getListTag("Sections");
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ArrayList<Section> sectionList = new ArrayList<>(sectionsTag.size());
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for (CompoundTag sectionTag : sectionsTag) {
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if (sectionTag.getListTag("Palette") == null) continue; // ignore empty sections
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Section section = new Section(sectionTag);
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int y = section.getSectionY();
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if (sectionMin > y) sectionMin = y;
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if (sectionMax < y) sectionMax = y;
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sectionList.add(section);
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}
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sections = new Section[1 + sectionMax - sectionMin];
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for (Section section : sectionList) {
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sections[section.sectionY - sectionMin] = section;
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}
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}
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Tag<?> tag = levelData.get("Biomes"); //tag can be byte-array or int-array
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if (tag instanceof ByteArrayTag) {
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byte[] bs = ((ByteArrayTag) tag).getValue();
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this.biomes = new int[bs.length];
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for (int i = 0; i < bs.length; i++) {
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biomes[i] = bs[i] & 0xFF;
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}
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}
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else if (tag instanceof IntArrayTag) {
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this.biomes = ((IntArrayTag) tag).getValue();
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}
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if (biomes == null) {
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this.biomes = new int[0];
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}
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}
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@Override
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public boolean isGenerated() {
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return isGenerated;
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}
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@Override
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public BlockState getBlockState(int x, int y, int z) {
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int sectionY = y >> 4;
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Section section = getSection(sectionY);
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if (section == null) return BlockState.AIR;
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return section.getBlockState(x, y, z);
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}
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@Override
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public LightData getLightData(int x, int y, int z, LightData target) {
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if (!hasLight) return target.set(15, 0);
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int sectionY = y >> 4;
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Section section = getSection(sectionY);
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if (section == null) return (sectionY < sectionMin) ? target.set(0, 0) : target.set(15, 0);
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return section.getLightData(x, y, z, target);
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}
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@Override
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public int getBiome(int x, int y, int z) {
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if (biomes.length < 16) return Biome.DEFAULT.getNumeralId();
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x = (x & 0xF) / 4; // Math.floorMod(pos.getX(), 16)
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z = (z & 0xF) / 4;
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y = y / 4;
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int biomeIntIndex = y * 16 + z * 4 + x; // TODO: fix this for 1.17+ worlds with negative y?
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// shift y up/down if not in range
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if (biomeIntIndex >= biomes.length) biomeIntIndex -= (((biomeIntIndex - biomes.length) >> 4) + 1) * 16;
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if (biomeIntIndex < 0) biomeIntIndex -= (biomeIntIndex >> 4) * 16;
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return biomes[biomeIntIndex];
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}
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@Override
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public int getMinY(int x, int z) {
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return sectionMin * 16;
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}
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@Override
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public int getMaxY(int x, int z) {
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return sectionMax * 16 + 15;
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}
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private Section getSection(int y) {
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y -= sectionMin;
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if (y < 0 || y >= this.sections.length) return null;
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return this.sections[y];
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}
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private static class Section {
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private static final String AIR_ID = "minecraft:air";
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private int sectionY;
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private byte[] blockLight;
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private byte[] skyLight;
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private long[] blocks;
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private BlockState[] palette;
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private int bitsPerBlock;
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@SuppressWarnings("unchecked")
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public Section(CompoundTag sectionData) {
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this.sectionY = sectionData.get("Y", NumberTag.class).asInt();
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this.blockLight = sectionData.getByteArray("BlockLight");
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this.skyLight = sectionData.getByteArray("SkyLight");
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this.blocks = sectionData.getLongArray("BlockStates");
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if (blocks.length < 256 && blocks.length > 0) blocks = Arrays.copyOf(blocks, 256);
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if (blockLight.length < 2048 && blockLight.length > 0) blockLight = Arrays.copyOf(blockLight, 2048);
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if (skyLight.length < 2048 && skyLight.length > 0) skyLight = Arrays.copyOf(skyLight, 2048);
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//read block palette
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ListTag<CompoundTag> paletteTag = (ListTag<CompoundTag>) sectionData.getListTag("Palette");
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if (paletteTag != null) {
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this.palette = new BlockState[paletteTag.size()];
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for (int i = 0; i < this.palette.length; i++) {
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CompoundTag stateTag = paletteTag.get(i);
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String id = stateTag.getString("Name"); //shortcut to save time and memory
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if (id.equals(AIR_ID)) {
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palette[i] = BlockState.AIR;
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continue;
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}
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Map<String, String> properties = new HashMap<>();
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if (stateTag.containsKey("Properties")) {
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CompoundTag propertiesTag = stateTag.getCompoundTag("Properties");
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for (Entry<String, Tag<?>> property : propertiesTag) {
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properties.put(property.getKey().toLowerCase(), ((StringTag) property.getValue()).getValue().toLowerCase());
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}
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}
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palette[i] = new BlockState(id, properties);
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}
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} else {
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this.palette = new BlockState[0];
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}
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this.bitsPerBlock = this.blocks.length >> 6; // available longs * 64 (bits per long) / 4096 (blocks per section) (floored result)
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}
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public int getSectionY() {
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return sectionY;
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}
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public BlockState getBlockState(int x, int y, int z) {
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if (blocks.length == 0) return BlockState.AIR;
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x &= 0xF; y &= 0xF; z &= 0xF; // Math.floorMod(pos.getX(), 16)
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int blockIndex = y * 256 + z * 16 + x;
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long value = MCAMath.getValueFromLongArray(blocks, blockIndex, bitsPerBlock);
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if (value >= palette.length) {
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Logger.global.noFloodWarning("palettewarning", "Got palette value " + value + " but palette has size of " + palette.length + "! (Future occasions of this error will not be logged)");
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return BlockState.MISSING;
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}
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return palette[(int) value];
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}
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public LightData getLightData(int x, int y, int z, LightData target) {
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if (blockLight.length == 0 && skyLight.length == 0) return target.set(0, 0);
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x &= 0xF; y &= 0xF; z &= 0xF; // Math.floorMod(pos.getX(), 16)
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int blockByteIndex = y * 256 + z * 16 + x;
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int blockHalfByteIndex = blockByteIndex >> 1; // blockByteIndex / 2
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boolean largeHalf = (blockByteIndex & 0x1) != 0; // (blockByteIndex % 2) == 0
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return target.set(
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this.skyLight.length > 0 ? MCAMath.getByteHalf(this.skyLight[blockHalfByteIndex], largeHalf) : 0,
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this.blockLight.length > 0 ? MCAMath.getByteHalf(this.blockLight[blockHalfByteIndex], largeHalf) : 0
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);
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}
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}
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}
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