mirror of https://github.com/webbukkit/dynmap.git
353 lines
13 KiB
Java
353 lines
13 KiB
Java
package org.dynmap.fabric_1_18;
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import net.minecraft.nbt.NbtCompound;
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import net.minecraft.nbt.NbtList;
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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.common.BiomeMap;
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import org.dynmap.renderer.DynmapBlockState;
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import net.fabricmc.fabric.api.util.NbtType;
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import java.util.Arrays;
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import java.util.LinkedList;
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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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public int getBiome(int x, int y, int z);
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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 sectionOffset;
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private final int[] hmap; // Height map
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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 BIOMES_PER_SECTION = 4 * 4 * 4;
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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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@Override
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public int getBiome(int x, int y, int z) {
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return BiomeMap.PLAINS.getBiomeID();
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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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int[] biomes;
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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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biomes = new int[BIOMES_PER_SECTION];
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Arrays.fill(biomes, BiomeMap.PLAINS.getBiomeID());
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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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@Override
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public int getBiome(int x, int y, int z) {
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int off = (((y & 0xF) >> 2) << 4) | ((z >> 2) << 2) | (x >> 2);
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return biomes[off];
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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.sectionCnt = worldheight / 16;
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/* Allocate arrays indexed by section */
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this.section = new Section[this.sectionCnt + 1];
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this.sectionOffset = 0;
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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[COLUMNS_PER_CHUNK];
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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 final long serialVersionUID = 1L;
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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(NbtCompound 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.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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this.hmap = new int[COLUMNS_PER_CHUNK];
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if (nbt.contains("Heightmaps")) {
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NbtCompound hmaps = nbt.getCompound("Heightmaps");
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long[] phmap = hmaps.getLongArray("WORLD_SURFACE");
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PackedIntegerArray hmap = new PackedIntegerArray((phmap.length * 64) / COLUMNS_PER_CHUNK, COLUMNS_PER_CHUNK,
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phmap);
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for (int i = 0; i < this.hmap.length; i++) {
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this.hmap[i] = hmap.get(i);
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}
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}
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/* Allocate arrays indexed by section */
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LinkedList<Section> sections = new LinkedList<Section>();
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int sectoff = 0; // Default to zero
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int sectcnt = 0;
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/* Fill with empty data */
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for (int i = 0; i <= this.sectionCnt; i++) {
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sections.add(empty_section);
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sectcnt++;
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}
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/* Get sections */
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NbtList sect = nbt.getList("sections", 10);
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for (int i = 0; i < sect.size(); i++) {
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NbtCompound sec = sect.getCompound(i);
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int secnum = sec.getByte("Y");
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// Beyond end - extend up
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while (secnum >= (sectcnt - sectoff)) {
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sections.addLast(empty_section); // Pad with empty
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sectcnt++;
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}
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// Negative - see if we need to extend sectionOffset
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while ((secnum + sectoff) < 0) {
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sections.addFirst(empty_section); // Pad with empty
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sectoff++;
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sectcnt++;
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}
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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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sections.set(secnum + sectoff, cursect);
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DynmapBlockState[] states = cursect.states;
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DynmapBlockState[] palette = null;
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int[] biomes = cursect.biomes;
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// If we've got palette and block states list, process non-empty section
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if (sec.contains("block_states", NbtType.COMPOUND)) {
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NbtCompound bstat = sec.getCompound("block_states");
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NbtList plist = bstat.getList("palette", 10);
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long[] statelist = bstat.getLongArray("data");
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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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NbtCompound 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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NbtCompound 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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if (statelist.length > 0) {
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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,
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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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}
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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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if (sec.contains("biomes")) {
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NbtCompound nbtbiomes = sec.getCompound("biomes");
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long[] bdataPacked = nbtbiomes.getLongArray("data");
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NbtList bpalette = nbtbiomes.getList("palette", NbtType.STRING);
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PackedIntegerArray bdata = null;
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if (bdataPacked.length > 0)
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bdata = new PackedIntegerArray(bdataPacked.length, 64, bdataPacked);
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for (int j = 0; j < 64; j++) {
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int b = bdata != null ? bdata.get(j) : 0;
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biomes[j] = b < bpalette.size() ? BiomeMap.byBiomeResourceLocation(bpalette.getString(b)).getBiomeID() : -1;
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}
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}
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}
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// Finalize sections array
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this.section = sections.toArray(new Section[sections.size()]);
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this.sectionOffset = sectoff;
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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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{
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int idx = (y >> 4) + sectionOffset;
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if ((idx < 0) || (idx >= section.length)) return DynmapBlockState.AIR;
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return section[idx].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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{
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int idx = (y >> 4) + sectionOffset;
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if ((idx < 0) || (idx >= section.length)) return 15;
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return section[idx].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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{
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int idx = (y >> 4) + sectionOffset;
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if ((idx < 0) || (idx >= section.length)) return 0;
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return section[idx].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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int y = getHighestBlockYAt(x, z);
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final int idx = (y >> 4) + sectionOffset;
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if ((idx < 0) || (idx >= section.length))
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return 0;
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return section[idx].getBiome(x % 16, y % 16, z % 16);
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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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{
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int idx = sy + sectionOffset;
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if ((idx < 0) || (idx >= section.length)) return true;
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return section[idx].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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