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feat(wasm-mesher): parse 1.21.5 – 26.3 map_chunk packets, fix 1.18+ light order #101

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Merged
zardoy merged 3 commits into from
Oct 16, 2026
Merged

feat(wasm-mesher): parse 1.21.5 – 26.3 map_chunk packets, fix 1.18+ light order #101

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db8df7c
fix(wasm-mesher): read 1.18+ map_chunk light in vanilla nibble order
mc-zuri Oct 14, 2026
96d1110
feat(wasm-mesher): parse 1.21.5 to 26.3 map_chunk packets
mc-zuri Oct 14, 2026
e2a1af0
fix(wasm-mesher): size and decode map_chunk containers like vanilla
mc-zuri Oct 14, 2026
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2 changes: 1 addition & 1 deletion chunk-packet-fixtures/fixtures/map_chunk/1.18.2/0_0.reference.json
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{
"version": "1.21.11",
"protocolVersion": 774,
"x": -1,
"z": 176,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 23644
}
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{
"version": "1.21.11",
"protocolVersion": 774,
"x": 0,
"z": 176,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 23659
}
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{
"version": "1.21.11",
"protocolVersion": 774,
"x": 0,
"z": 177,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 25720
}
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{
"version": "1.21.5",
"protocolVersion": 770,
"x": -1,
"z": 176,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 23695
}
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{
"version": "1.21.5",
"protocolVersion": 770,
"x": 0,
"z": 176,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 23710
}
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{
"version": "1.21.5",
"protocolVersion": 770,
"x": 0,
"z": 177,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 25769
}
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{
"version": "26.1",
"protocolVersion": 775,
"x": 0,
"z": 176,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 23707
}
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{
"version": "26.1",
"protocolVersion": 775,
"x": 0,
"z": 177,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 25766
}
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{
"version": "26.1",
"protocolVersion": 775,
"x": 0,
"z": 178,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 21666
}
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{
"version": "26.3",
"protocolVersion": 777,
"x": 0,
"z": 176,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 23682
}
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{
"version": "26.3",
"protocolVersion": 777,
"x": 0,
"z": 177,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 25741
}
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{
"version": "26.3",
"protocolVersion": 777,
"x": 0,
"z": 178,
"packetName": "map_chunk",
"source": "vanilla client recording",
"byteLength": 21627
}
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20 changes: 20 additions & 0 deletions src/wasm-mesher/bridge/convertChunk.ts
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Expand Up @@ -47,6 +47,26 @@ export const getBlockMeta = (version: string): BlockMeta => {
return meta
}

const ceilLog2 = (count: number) => (count <= 1 ? 0 : 32 - Math.clz32(count - 1))

const globalPaletteBitsCache = new Map<string, { blocks: number; biomes: number }>()

/**
* Bits of the global block state and biome palettes, vanilla's
* `Strategy.globalPaletteBitsInMemory`: ceillog2 of the registry size.
* map_chunk stores direct (unpaletted) containers with them. The biome count
* is minecraft-data's vanilla registry; a server's own biomes can change it.
*/
export const getGlobalPaletteBits = (version: string) => {
const cached = globalPaletteBitsCache.get(version)
if (cached) return cached
const mcData = MinecraftData(version)
const blockStates = mcData.blocksArray.reduce((max, block) => Math.max(max, block.maxStateId ?? 0), 0) + 1
const bits = { blocks: ceilLog2(blockStates), biomes: ceilLog2(mcData.biomesArray.length) }
globalPaletteBitsCache.set(version, bits)
return bits
}

export interface ChunkConversionResult {
blockStates: Uint16Array
blockLight: Uint8Array
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22 changes: 11 additions & 11 deletions src/wasm-mesher/runtime-build/wasm_mesher.d.ts
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Expand Up @@ -226,23 +226,23 @@ export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembl

export interface InitOutput {
readonly memory: WebAssembly.Memory;
readonly computeWireframeEdges: (a: number, b: number, c: number, d: number) => [number, number];
readonly computeWireframeEdgesU16: (a: number, b: number, c: number, d: number) => [number, number];
readonly generateGeometryFromDump118: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number, i1: number, j1: number, k1: number) => any;
readonly generateGeometryFromMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number) => any;
readonly generateGeometryFromMapChunkV18PlusMulti: (a: any, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number) => any;
readonly generateGeometryFromParsedV16V17: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number) => any;
readonly generateGeometryFromParsedV16V17Multi: (a: any, b: number, c: number, d: number, e: number, f: number, g: any, h: number, i: any, j: any, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number) => any;
readonly generate_geometry: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number) => any;
readonly generate_geometry_multi: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number) => any;
readonly parseChunkDump118: (a: number, b: number, c: number, d: number, e: number) => any;
readonly unpackLightSection118: (a: number, b: number) => [number, number];
readonly parseChunkDump118NoMarshal: (a: number, b: number, c: number, d: number, e: number) => number;
readonly parseChunkDump118FullColumnAll: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number) => any;
readonly generateGeometryFromDump118: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number, i1: number, j1: number, k1: number) => any;
readonly parseChunkDump118FullColumn: (a: number, b: number, c: number, d: number, e: number) => any;
readonly generateGeometryFromMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number) => any;
readonly parseMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number) => any;
readonly parseChunkDump118FullColumnAll: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number) => any;
readonly parseChunkDump118NoMarshal: (a: number, b: number, c: number, d: number, e: number) => number;
readonly parseChunkSectionsV16V17: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number) => any;
readonly generateGeometryFromParsedV16V17: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number) => any;
readonly generateGeometryFromMapChunkV18PlusMulti: (a: any, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number) => any;
readonly generateGeometryFromParsedV16V17Multi: (a: any, b: number, c: number, d: number, e: number, f: number, g: any, h: number, i: any, j: any, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number) => any;
readonly computeWireframeEdges: (a: number, b: number, c: number, d: number) => [number, number];
readonly computeWireframeEdgesU16: (a: number, b: number, c: number, d: number) => [number, number];
readonly parseMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number) => any;
readonly parseUpdateLightV17: (a: number, b: number, c: number) => any;
readonly unpackLightSection118: (a: number, b: number) => [number, number];
readonly __wbindgen_malloc: (a: number, b: number) => number;
readonly __wbindgen_realloc: (a: number, b: number, c: number, d: number) => number;
readonly __wbindgen_exn_store: (a: number) => void;
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22 changes: 11 additions & 11 deletions src/wasm-mesher/runtime-build/wasm_mesher_bg.wasm.d.ts
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@@ -1,23 +1,23 @@
/* tslint:disable */
/* eslint-disable */
export const memory: WebAssembly.Memory;
export const computeWireframeEdges: (a: number, b: number, c: number, d: number) => [number, number];
export const computeWireframeEdgesU16: (a: number, b: number, c: number, d: number) => [number, number];
export const generateGeometryFromDump118: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number, i1: number, j1: number, k1: number) => any;
export const generateGeometryFromMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number) => any;
export const generateGeometryFromMapChunkV18PlusMulti: (a: any, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number) => any;
export const generateGeometryFromParsedV16V17: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number) => any;
export const generateGeometryFromParsedV16V17Multi: (a: any, b: number, c: number, d: number, e: number, f: number, g: any, h: number, i: any, j: any, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number) => any;
export const generate_geometry: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number) => any;
export const generate_geometry_multi: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number) => any;
export const parseChunkDump118: (a: number, b: number, c: number, d: number, e: number) => any;
export const unpackLightSection118: (a: number, b: number) => [number, number];
export const parseChunkDump118NoMarshal: (a: number, b: number, c: number, d: number, e: number) => number;
export const parseChunkDump118FullColumnAll: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number) => any;
export const generateGeometryFromDump118: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number, i1: number, j1: number, k1: number) => any;
export const parseChunkDump118FullColumn: (a: number, b: number, c: number, d: number, e: number) => any;
export const generateGeometryFromMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number) => any;
export const parseMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number) => any;
export const parseChunkDump118FullColumnAll: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number) => any;
export const parseChunkDump118NoMarshal: (a: number, b: number, c: number, d: number, e: number) => number;
export const parseChunkSectionsV16V17: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number) => any;
export const generateGeometryFromParsedV16V17: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number) => any;
export const generateGeometryFromMapChunkV18PlusMulti: (a: any, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number) => any;
export const generateGeometryFromParsedV16V17Multi: (a: any, b: number, c: number, d: number, e: number, f: number, g: any, h: number, i: any, j: any, k: number, l: number, m: number, n: number, o: number, p: number, q: number, r: number, s: number, t: number, u: number, v: number, w: number, x: number, y: number, z: number, a1: number, b1: number, c1: number, d1: number, e1: number, f1: number, g1: number, h1: number) => any;
export const computeWireframeEdges: (a: number, b: number, c: number, d: number) => [number, number];
export const computeWireframeEdgesU16: (a: number, b: number, c: number, d: number) => [number, number];
export const parseMapChunkV18Plus: (a: number, b: number, c: number, d: number, e: number, f: number) => any;
export const parseUpdateLightV17: (a: number, b: number, c: number) => any;
export const unpackLightSection118: (a: number, b: number) => [number, number];
export const __wbindgen_malloc: (a: number, b: number) => number;
export const __wbindgen_realloc: (a: number, b: number, c: number, d: number) => number;
export const __wbindgen_exn_store: (a: number) => void;
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16 changes: 16 additions & 0 deletions src/wasm-mesher/tests/globalPaletteBits.test.ts
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import { describe, expect, test } from 'vitest'
import { getGlobalPaletteBits } from '../bridge/convertChunk'

describe('getGlobalPaletteBits', () => {
test('is ceillog2 of the block state and biome registry sizes', () => {
// 20342 states, 61 biomes
expect(getGlobalPaletteBits('1.18.2')).toEqual({ blocks: 15, biomes: 6 })
// 65 biomes need a seventh bit
expect(getGlobalPaletteBits('1.21.4')).toEqual({ blocks: 15, biomes: 7 })
})

test('needs no extra bit for a power-of-two registry', () => {
// 64 biomes fit in 6 bits (Mth.ceillog2(64) = 6)
expect(getGlobalPaletteBits('1.20.4').biomes).toBe(6)
})
})
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