mirror of https://github.com/webbukkit/dynmap.git
303 lines
11 KiB
Java
303 lines
11 KiB
Java
package org.dynmap.fabric_1_16_4;
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import net.minecraft.nbt.CompoundTag;
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import net.minecraft.nbt.ListTag;
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import net.minecraft.util.collection.PackedIntegerArray;
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import net.minecraft.util.math.MathHelper;
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import net.minecraft.util.math.WordPackedArray;
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import org.dynmap.Log;
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import org.dynmap.renderer.DynmapBlockState;
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import java.util.Arrays;
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/**
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* Represents a static, thread-safe snapshot of chunk of blocks
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* Purpose is to allow clean, efficient copy of a chunk data to be made, and then handed off for processing in another thread (e.g. map rendering)
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*/
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public class ChunkSnapshot {
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private static interface Section {
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public DynmapBlockState getBlockType(int x, int y, int z);
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public int getBlockSkyLight(int x, int y, int z);
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public int getBlockEmittedLight(int x, int y, int z);
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public boolean isEmpty();
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}
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private final int x, z;
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private final Section[] section;
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private final int[] hmap; // Height map
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private final int[] biome;
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private final long captureFulltime;
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private final int sectionCnt;
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private final long inhabitedTicks;
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private static final int BLOCKS_PER_SECTION = 16 * 16 * 16;
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private static final int COLUMNS_PER_CHUNK = 16 * 16;
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private static final byte[] emptyData = new byte[BLOCKS_PER_SECTION / 2];
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private static final byte[] fullData = new byte[BLOCKS_PER_SECTION / 2];
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static {
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Arrays.fill(fullData, (byte) 0xFF);
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}
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private static class EmptySection implements Section {
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@Override
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public DynmapBlockState getBlockType(int x, int y, int z) {
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return DynmapBlockState.AIR;
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}
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@Override
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public int getBlockSkyLight(int x, int y, int z) {
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return 15;
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}
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@Override
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public int getBlockEmittedLight(int x, int y, int z) {
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return 0;
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}
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@Override
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public boolean isEmpty() {
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return true;
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}
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}
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private static final EmptySection empty_section = new EmptySection();
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private static class StdSection implements Section {
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DynmapBlockState[] states;
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byte[] skylight;
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byte[] emitlight;
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public StdSection() {
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states = new DynmapBlockState[BLOCKS_PER_SECTION];
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Arrays.fill(states, DynmapBlockState.AIR);
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skylight = emptyData;
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emitlight = emptyData;
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}
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@Override
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public DynmapBlockState getBlockType(int x, int y, int z) {
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return states[((y & 0xF) << 8) | (z << 4) | x];
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}
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@Override
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public int getBlockSkyLight(int x, int y, int z) {
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int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
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return (skylight[off] >> (4 * (x & 1))) & 0xF;
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}
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@Override
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public int getBlockEmittedLight(int x, int y, int z) {
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int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
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return (emitlight[off] >> (4 * (x & 1))) & 0xF;
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}
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@Override
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public boolean isEmpty() {
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return false;
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}
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}
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/**
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* Construct empty chunk snapshot
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*
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* @param x
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* @param z
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*/
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public ChunkSnapshot(int worldheight, int x, int z, long captime, long inhabitedTime) {
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this.x = x;
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this.z = z;
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this.captureFulltime = captime;
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this.biome = new int[COLUMNS_PER_CHUNK];
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this.sectionCnt = worldheight / 16;
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/* Allocate arrays indexed by section */
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this.section = new Section[this.sectionCnt];
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/* Fill with empty data */
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for (int i = 0; i < this.sectionCnt; i++) {
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this.section[i] = empty_section;
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}
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/* Create empty height map */
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this.hmap = new int[16 * 16];
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this.inhabitedTicks = inhabitedTime;
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}
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public static class StateListException extends Exception {
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private static boolean loggedOnce = false;
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public StateListException(int x, int z, int actualLength, int expectedLength, int expectedLegacyLength) {
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if (Log.verbose || !loggedOnce) {
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loggedOnce = true;
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Log.info("Skipping chunk at x=" + x + ",z=" + z + ". Expected statelist of length " + expectedLength + " or " + expectedLegacyLength + " but got " + actualLength + ". This can happen if the chunk was not yet converted to the 1.16 format which can be fixed by visiting the chunk.");
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if (!Log.verbose) {
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Log.info("You will only see this message once. Turn on verbose logging in the configuration to see all messages.");
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}
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}
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}
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}
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public ChunkSnapshot(CompoundTag nbt, int worldheight) throws StateListException {
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this.x = nbt.getInt("xPos");
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this.z = nbt.getInt("zPos");
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this.captureFulltime = 0;
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this.hmap = nbt.getIntArray("HeightMap");
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this.sectionCnt = worldheight / 16;
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if (nbt.contains("InhabitedTime")) {
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this.inhabitedTicks = nbt.getLong("InhabitedTime");
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} else {
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this.inhabitedTicks = 0;
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}
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/* Allocate arrays indexed by section */
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this.section = new Section[this.sectionCnt];
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/* Fill with empty data */
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for (int i = 0; i < this.sectionCnt; i++) {
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this.section[i] = empty_section;
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}
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/* Get sections */
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ListTag sect = nbt.getList("Sections", 10);
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for (int i = 0; i < sect.size(); i++) {
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CompoundTag sec = sect.getCompound(i);
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int secnum = sec.getByte("Y");
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if (secnum >= this.sectionCnt) {
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//Log.info("Section " + (int) secnum + " above world height " + worldheight);
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continue;
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}
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if (secnum < 0)
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continue;
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//System.out.println("section(" + secnum + ")=" + sec.asString());
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// Create normal section to initialize
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StdSection cursect = new StdSection();
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this.section[secnum] = cursect;
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DynmapBlockState[] states = cursect.states;
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DynmapBlockState[] palette = null;
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// If we've got palette and block states list, process non-empty section
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if (sec.contains("Palette", 9) && sec.contains("BlockStates", 12)) {
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ListTag plist = sec.getList("Palette", 10);
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long[] statelist = sec.getLongArray("BlockStates");
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palette = new DynmapBlockState[plist.size()];
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for (int pi = 0; pi < plist.size(); pi++) {
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CompoundTag tc = plist.getCompound(pi);
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String pname = tc.getString("Name");
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if (tc.contains("Properties")) {
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StringBuilder statestr = new StringBuilder();
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CompoundTag prop = tc.getCompound("Properties");
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for (String pid : prop.getKeys()) {
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if (statestr.length() > 0) statestr.append(',');
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statestr.append(pid).append('=').append(prop.get(pid).asString());
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}
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palette[pi] = DynmapBlockState.getStateByNameAndState(pname, statestr.toString());
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}
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if (palette[pi] == null) {
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palette[pi] = DynmapBlockState.getBaseStateByName(pname);
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}
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if (palette[pi] == null) {
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palette[pi] = DynmapBlockState.AIR;
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}
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}
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PackedIntegerArray db = null;
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WordPackedArray dbp = null;
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int bitsperblock = (statelist.length * 64) / 4096;
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int expectedStatelistLength = (4096 + (64 / bitsperblock) - 1) / (64 / bitsperblock);
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if (statelist.length == expectedStatelistLength) {
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db = new PackedIntegerArray(bitsperblock, 4096, statelist);
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} else {
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int expectedLegacyStatelistLength = MathHelper.roundUpToMultiple(bitsperblock * 4096, 64) / 64;
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if (statelist.length == expectedLegacyStatelistLength) {
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dbp = new WordPackedArray(bitsperblock, 4096, statelist);
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} else {
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throw new StateListException(x, z, statelist.length, expectedStatelistLength, expectedLegacyStatelistLength);
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}
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}
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if (bitsperblock > 8) { // Not palette
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for (int j = 0; j < 4096; j++) {
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int v = db != null ? db.get(j) : dbp.get(j);
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states[j] = DynmapBlockState.getStateByGlobalIndex(v);
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}
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} else {
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for (int j = 0; j < 4096; j++) {
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int v = db != null ? db.get(j) : dbp.get(j);
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states[j] = (v < palette.length) ? palette[v] : DynmapBlockState.AIR;
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}
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}
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}
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if (sec.contains("BlockLight")) {
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cursect.emitlight = sec.getByteArray("BlockLight");
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}
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if (sec.contains("SkyLight")) {
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cursect.skylight = sec.getByteArray("SkyLight");
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}
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}
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/* Get biome data */
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this.biome = new int[COLUMNS_PER_CHUNK];
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if (nbt.contains("Biomes")) {
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int[] bb = nbt.getIntArray("Biomes");
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if (bb != null) {
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// If v1.15+ format
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if (bb.length > COLUMNS_PER_CHUNK) {
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// For now, just pad the grid with the first 16
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for (int i = 0; i < COLUMNS_PER_CHUNK; i++) {
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int off = ((i >> 4) & 0xC) + ((i >> 2) & 0x3);
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int bv = bb[off + 64]; // Offset to y=64
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if (bv < 0) bv = 0;
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this.biome[i] = bv;
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}
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} else { // Else, older chunks
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for (int i = 0; i < bb.length; i++) {
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int bv = bb[i];
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if (bv < 0) bv = 0;
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this.biome[i] = bv;
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}
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}
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}
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}
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}
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public int getX() {
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return x;
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}
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public int getZ() {
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return z;
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}
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public DynmapBlockState getBlockType(int x, int y, int z) {
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return section[y >> 4].getBlockType(x, y, z);
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}
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public int getBlockSkyLight(int x, int y, int z) {
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return section[y >> 4].getBlockSkyLight(x, y, z);
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}
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public int getBlockEmittedLight(int x, int y, int z) {
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return section[y >> 4].getBlockEmittedLight(x, y, z);
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}
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public int getHighestBlockYAt(int x, int z) {
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return hmap[z << 4 | x];
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}
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public int getBiome(int x, int z) {
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return biome[z << 4 | x];
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}
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public final long getCaptureFullTime() {
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return captureFulltime;
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}
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public boolean isSectionEmpty(int sy) {
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return section[sy].isEmpty();
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}
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public long getInhabitedTicks() {
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return inhabitedTicks;
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}
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}
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