94 lines
2.6 KiB
JavaScript
94 lines
2.6 KiB
JavaScript
/*
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===========- ChunkWorker.js -===========
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Created by Holly (tgpethan) (c) 2021
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Licenced under MIT
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========================================
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*/
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const { parentPort } = require('worker_threads');
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const { deflateSync } = require("zlib");
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const bufferStuff = require("../bufferStuff.js");
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let busyInterval = null;
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parentPort.on("message", (data) => {
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// This stops the thread from stopping :)
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if (busyInterval == null) busyInterval = setInterval(() => {}, 86400000); // Runs once a day
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switch (data[0]) {
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case "chunk":
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parentPort.postMessage([data[0], doChunk(data[1]), data[2]]);
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break;
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case "generate":
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parentPort.postMessage([data[0], generateChunk(), data[1], data[2], data[3]]);
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break;
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}
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});
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function generateChunk() {
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let chunk = {};
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for (let y = 0; y < 128; y++) {
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chunk[y] = {};
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for (let x = 0; x < 16; x++) {
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chunk[y][x] = {};
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for (let z = 0; z < 16; z++) {
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if (y == 64) {
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chunk[y][x][z] = 2;
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}
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else if (y == 63 || y == 62) chunk[y][x][z] = 3;
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else if (y == 0) chunk[y][x][z] = 7;
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else if (y < 62) chunk[y][x][z] = 1;
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else chunk[y][x][z] = 0;
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}
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}
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}
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return chunk;
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}
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function doChunk(chunk) {
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const writer = new bufferStuff.Writer(18);
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writer.writeByte(0x33); // Chunk
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writer.writeInt(chunk[0] << 4); // Chunk X
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writer.writeShort(0 << 7); // Chunk Y
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writer.writeInt(chunk[1] << 4); // Chunk Z
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writer.writeByte(15); // Size X
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writer.writeByte(127); // Size Y
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writer.writeByte(15); // Size Z
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// pre-alloc since doing an alloc 98,304 times takes a while yknow.
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const blocks = new bufferStuff.Writer(32768);
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const metadata = new bufferStuff.Writer(32768);
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const lighting = new bufferStuff.Writer(32768);
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let blockMeta = false;
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for (let x = 0; x < 16; x++) {
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for (let z = 0; z < 16; z++) {
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for (let y = 0; y < 128; y++) {
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blocks.writeByte(chunk[2][y][x][z]); // The block
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if (blockMeta) {
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metadata.writeByte(0x00); // TODO: Metadata
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// Light level 15 for 2 blocks (1111 1111)
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lighting.writeUByte(0xFF); // TODO: Lighting (Client seems to do it's own so it's not top priority)
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}
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// Hack for nibble stuff
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blockMeta = !blockMeta;
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}
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}
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}
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// These are hacks for the nibbles
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blocks.writeBuffer(metadata.buffer);
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blocks.writeBuffer(lighting.buffer); // Block lighting
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//blocks.writeBuffer(lighting.buffer); // Sky lighting (Looks like this isn't needed???)
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// We're on another thread we don't care if we halt
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const deflated = deflateSync(blocks.buffer);
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writer.writeInt(deflated.length); // Compressed Size
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writer.writeBuffer(deflated); // Compressed chunk data
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return writer.buffer;
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} |