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fixed

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This commit is contained in:
Aotumuri
2025-05-30 15:05:14 +09:00
parent 6e924c24a9
commit 916e692d05
1 changed files with 10 additions and 11 deletions
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src/client/TerritoryPatterns.ts
+10 -11
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@@ -28,9 +28,10 @@ export class PatternDecoder {
throw new Error("The pattern versions are different.");
}
this.tileWidth = (bytes[1] << 8) | bytes[2];
this.tileHeight = (bytes[3] << 8) | bytes[4];
this.scale = (bytes[5] << 8) | bytes[6];
const view = new DataView(bytes.buffer, bytes.byteOffset + 1, 6);
this.tileWidth = view.getUint16(0, false);
this.tileHeight = view.getUint16(2, false);
this.scale = view.getUint16(4, false);
this.dataStart = 7;
this.bytes = bytes;
}
@@ -48,16 +49,14 @@ export class PatternDecoder {
}
isSet(x: number, y: number): boolean {
const px =
((Math.floor(x / this.scale) % this.tileWidth) + this.tileWidth) %
this.tileWidth;
const py =
((Math.floor(y / this.scale) % this.tileHeight) + this.tileHeight) %
this.tileHeight;
const norm = (v: number, mod: number) => (v + mod) % mod;
const px = norm((x / this.scale) | 0, this.tileWidth);
const py = norm((y / this.scale) | 0, this.tileHeight);
const idx = py * this.tileWidth + px;
const byteIndex = Math.floor(idx / 8);
const byteIndex = idx >> 3;
const bitIndex = 7 - (idx % 8);
const byte = this.bytes[this.dataStart + byteIndex] ?? 0;
const byte = this.bytes[this.dataStart + byteIndex];
if (byte === undefined) throw new Error("Invalid pattern");
return (byte & (1 << bitIndex)) !== 0;
}
}