@jsprismarine/prismarine
Version:
Dedicated Minecraft Bedrock Edition server written in TypeScript
155 lines (148 loc) • 19 kB
JavaScript
;
Object.defineProperties(exports, { __esModule: { value: true }, [Symbol.toStringTag]: { value: 'Module' } });
const block_BlockMappings = require('../../block/BlockMappings.cjs.cjs');
const BinaryStream = require('@jsprismarine/jsbinaryutils');
const math = require('@jsprismarine/math');
const world_chunk_SubChunk = require('./SubChunk.cjs.cjs');
const _interopDefault = e => e && e.__esModule ? e : { default: e };
const BinaryStream__default = /*#__PURE__*/_interopDefault(BinaryStream);
const MAX_SUBCHUNKS = 16;
class Chunk {
x;
z;
hasChanged;
subChunks = /* @__PURE__ */ new Map();
static EMPTY_SUBCHUNK = new world_chunk_SubChunk.default();
constructor(chunkX = 0, chunkZ = 0, _subChunks = /* @__PURE__ */ new Map()) {
this.x = chunkX;
this.z = chunkZ;
this.hasChanged = false;
}
getX() {
return this.x;
}
getZ() {
return this.z;
}
getHasChanged() {
return this.hasChanged;
}
getHeight() {
return this.subChunks.size;
}
/**
* Returns the highest empty sub chunk (so we don't send empty sub chunks).
* @returns {number} The highest empty sub chunk.
*/
getTopEmpty() {
let topEmpty = MAX_SUBCHUNKS - 1;
while (topEmpty >= 0 && !this.subChunks.has(topEmpty) || this.subChunks.has(topEmpty) && this.subChunks.get(topEmpty).isEmpty()) {
topEmpty--;
}
return ++topEmpty;
}
/**
* Returns the Chunk slice at the given layer.
* @param {number} y - The layer to get.
*/
getSubChunk(y) {
if (y < 0 || y > MAX_SUBCHUNKS) {
throw new Error(`Invalid subchunk height: ${y}`);
}
return this.subChunks.get(y) ?? null;
}
getOrCreateSubChunk(y) {
const subChunk = new world_chunk_SubChunk.default();
this.subChunks.set(y, subChunk);
return subChunk;
}
getSubChunks() {
return this.subChunks;
}
getHighestBlockAt(_x, _z) {
return 100;
}
/**
* Returns block legacy id (DATA) in the corresponding sub chunk.
* Use world to get the actual block instance (this is to keep code clean).
* @param {Vector3 | number} x - block x.
* @param {number} [y=0] - block y.
* @param {number} [z=0] - block z.
* @param {number} [layer=0] - block storage layer (0 for blocks, 1 for liquids).
*/
getBlock(x, y = 0, z = 0, layer = 0) {
if (x instanceof math.Vector3) {
return this.getBlock(x.getX(), x.getY(), x.getZ(), layer);
}
const subChunk = this.getSubChunk(Math.floor(y / 16));
if (!subChunk) return block_BlockMappings.BlockMappings.getLegacyId(block_BlockMappings.BlockMappings.getRuntimeId("minecraft:air"));
return subChunk.getBlock(x, y & 15, z, layer);
}
/**
* Sets a block into the chunk by its runtime Id.
* @param {number} x - block x
* @param {number} y - block y
* @param {number} z - block z
* @param {Block} block - block to set
* @param {number} [layer=0] - block storage layer (0 for blocks, 1 for liquids)
*/
setBlock(x, y, z, block, layer = 0) {
let subChunk = this.getSubChunk(Math.floor(y / 16));
if (!subChunk) subChunk = this.getOrCreateSubChunk(y >> 4);
subChunk.setBlock(x, y & 15, z, block_BlockMappings.BlockMappings.getRuntimeId(block.getName()), layer);
this.hasChanged = true;
}
/**
* Helper method used to hash into a single 64 bits integer
* both Chunk X and Z coordinates.
* @param {number} chunkX - Target Chunk X coordinate.
* @param {number} chunkZ - Target Chunk Z coordinate.
* @returns {bigint} A 64 bit intger containing a hash of X and Z.
*/
static packXZ(chunkX, chunkZ) {
return (BigInt(chunkX) & 0xffffffffn) << 32n | BigInt(chunkZ) & 0xffffffffn;
}
/**
* Helper method used to decode a 64 bit hash containing
* both Chunk X and Z coordinates.
* @param {bigint} packed - Target Chunk coordinate hash.
* @returns {number[]} An array containing decoded Chunk X and Z coordinates.
*/
static unpackXZ(packed) {
return [Number(BigInt.asIntN(32, packed >> 32n)), Number(BigInt.asIntN(32, packed & 0xffffffffn))];
}
networkSerialize() {
const stream = new BinaryStream__default.default();
for (let y = 0; y < 4; ++y) {
stream.writeByte(8);
stream.writeByte(0);
}
for (let y = 0; y < this.getTopEmpty(); ++y) {
(this.subChunks.get(y) ?? Chunk.EMPTY_SUBCHUNK).networkSerialize(stream);
}
for (let i = 0; i < 24; i++) {
stream.writeByte(0);
stream.writeUnsignedVarInt(1 << 1);
}
stream.writeByte(0);
return stream.getBuffer();
}
/**
* Deserialize network stream into chunk
* useful for client applications and/or our Filesystem impl
* @param {BinaryStream} stream - the network stream
* @param {number} [x] - the chunk x coordinate
* @param {number} [z] - the chunk z coordinate
*/
static networkDeserialize(stream, x, z) {
stream.read(8);
const subChunks = /* @__PURE__ */ new Map();
for (let i = 0; i < MAX_SUBCHUNKS; i++) {
subChunks.set(i, world_chunk_SubChunk.default.networkDeserialize(stream));
}
const chunk = new Chunk(x, z, subChunks);
return chunk;
}
}
exports.default = Chunk;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"Chunk.cjs.cjs","sources":["../../../src/world/chunk/Chunk.ts"],"sourcesContent":["import type { LegacyId } from '../../block/BlockMappings';\nimport { BlockMappings } from '../../block/BlockMappings';\n\nimport BinaryStream from '@jsprismarine/jsbinaryutils';\nimport { Vector3 } from '@jsprismarine/math';\nimport type { Block } from '../../block/Block';\nimport SubChunk from './SubChunk';\n\nconst MAX_SUBCHUNKS = 16;\n\nexport default class Chunk {\n    private x: number;\n    private z: number;\n    private hasChanged: boolean;\n\n    private subChunks: Map<number, SubChunk> = new Map();\n    private static readonly EMPTY_SUBCHUNK = new SubChunk();\n\n    public constructor(chunkX = 0, chunkZ = 0, _subChunks: Map<number, SubChunk> = new Map()) {\n        this.x = chunkX;\n        this.z = chunkZ;\n        this.hasChanged = false;\n    }\n\n    public getX(): number {\n        return this.x;\n    }\n\n    public getZ(): number {\n        return this.z;\n    }\n\n    public getHasChanged(): boolean {\n        return this.hasChanged;\n    }\n\n    public getHeight(): number {\n        return this.subChunks.size;\n    }\n\n    /**\n     * Returns the highest empty sub chunk (so we don't send empty sub chunks).\n     * @returns {number} The highest empty sub chunk.\n     */\n    public getTopEmpty(): number {\n        let topEmpty = MAX_SUBCHUNKS - 1;\n        while (\n            (topEmpty >= 0 && !this.subChunks.has(topEmpty)) ||\n            (this.subChunks.has(topEmpty) && this.subChunks.get(topEmpty)!.isEmpty())\n        ) {\n            topEmpty--;\n        }\n        return ++topEmpty;\n    }\n\n    /**\n     * Returns the Chunk slice at the given layer.\n     * @param {number} y - The layer to get.\n     */\n    public getSubChunk(y: number): SubChunk | null {\n        if (y < 0 || y > MAX_SUBCHUNKS) {\n            throw new Error(`Invalid subchunk height: ${y}`);\n        }\n        return this.subChunks.get(y) ?? null;\n    }\n\n    public getOrCreateSubChunk(y: number): SubChunk {\n        const subChunk = new SubChunk();\n        this.subChunks.set(y, subChunk);\n        return subChunk;\n    }\n\n    public getSubChunks(): Map<number, SubChunk> {\n        return this.subChunks;\n    }\n\n    public getHighestBlockAt(_x: number, _z: number): number {\n        return 100;\n    }\n\n    /**\n     * Returns block legacy id (DATA) in the corresponding sub chunk.\n     * Use world to get the actual block instance (this is to keep code clean).\n     * @param {Vector3 | number} x - block x.\n     * @param {number} [y=0] - block y.\n     * @param {number} [z=0] - block z.\n     * @param {number} [layer=0] - block storage layer (0 for blocks, 1 for liquids).\n     */\n    public getBlock(x: Vector3 | number, y: number = 0, z: number = 0, layer = 0): LegacyId {\n        if (x instanceof Vector3) {\n            return this.getBlock(x.getX(), x.getY(), x.getZ(), layer);\n        }\n\n        const subChunk = this.getSubChunk(Math.floor(y / 16));\n        if (!subChunk) return BlockMappings.getLegacyId(BlockMappings.getRuntimeId('minecraft:air'));\n        return subChunk.getBlock(x, y & 0xf, z, layer);\n    }\n\n    /**\n     * Sets a block into the chunk by its runtime Id.\n     * @param {number} x - block x\n     * @param {number} y - block y\n     * @param {number} z - block z\n     * @param {Block} block - block to set\n     * @param {number} [layer=0] - block storage layer (0 for blocks, 1 for liquids)\n     */\n    public setBlock(x: number, y: number, z: number, block: Block, layer = 0): void {\n        let subChunk = this.getSubChunk(Math.floor(y / 16));\n        if (!subChunk) subChunk = this.getOrCreateSubChunk(y >> 4);\n        subChunk.setBlock(x, y & 0xf, z, BlockMappings.getRuntimeId(block.getName()), layer);\n\n        this.hasChanged = true;\n    }\n\n    /**\n     * Helper method used to hash into a single 64 bits integer\n     * both Chunk X and Z coordinates.\n     * @param {number} chunkX - Target Chunk X coordinate.\n     * @param {number} chunkZ - Target Chunk Z coordinate.\n     * @returns {bigint} A 64 bit intger containing a hash of X and Z.\n     */\n    public static packXZ(chunkX: number, chunkZ: number): bigint {\n        return ((BigInt(chunkX) & 0xffffffffn) << 32n) | (BigInt(chunkZ) & 0xffffffffn);\n    }\n\n    /**\n     * Helper method used to decode a 64 bit hash containing\n     * both Chunk X and Z coordinates.\n     * @param {bigint} packed - Target Chunk coordinate hash.\n     * @returns {number[]} An array containing decoded Chunk X and Z coordinates.\n     */\n    public static unpackXZ(packed: bigint): number[] {\n        return [Number(BigInt.asIntN(32, packed >> 32n)), Number(BigInt.asIntN(32, packed & 0xffffffffn))];\n    }\n\n    public networkSerialize(): Buffer {\n        const stream = new BinaryStream();\n\n        // For some reasons we need this hack since 1.18,\n        // seems like the client now has some negative space.\n        // TODO: figure out what is this\n        for (let y = 0; y < 4; ++y) {\n            stream.writeByte(8); // subchunk version 8\n            stream.writeByte(0); // 0 layers (all air)\n        }\n\n        for (let y = 0; y < this.getTopEmpty(); ++y) {\n            (this.subChunks.get(y) ?? Chunk.EMPTY_SUBCHUNK).networkSerialize(stream);\n        }\n\n        // TODO: 3D biomes\n        for (let i = 0; i < 24; i++) {\n            stream.writeByte(0); // fake biome palette, non persistent\n            stream.writeUnsignedVarInt(1 << 1); // plains\n        }\n\n        stream.writeByte(0); // border ?\n\n        // TODO: tiles\n        return stream.getBuffer();\n    }\n\n    /**\n     * Deserialize network stream into chunk\n     * useful for client applications and/or our Filesystem impl\n     * @param {BinaryStream} stream - the network stream\n     * @param {number} [x] - the chunk x coordinate\n     * @param {number} [z] - the chunk z coordinate\n     */\n    public static networkDeserialize(stream: BinaryStream, x?: number, z?: number): Chunk {\n        stream.read(8); // skip fake subchunks\n\n        const subChunks: Map<number, SubChunk> = new Map();\n        for (let i = 0; i < MAX_SUBCHUNKS; i++) {\n            subChunks.set(i, SubChunk.networkDeserialize(stream));\n        }\n\n        const chunk = new Chunk(x, z, subChunks);\n        return chunk;\n    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