arx-convert/dist/llf/LlfHeader.js

Converts various Arx Fatalis formats to JSON or YAML and back

import { BinaryIO } from '../common/BinaryIO.js';
import { DANAE_VERSION } from '../common/constants.js';
import { repeat } from '../common/helpers.js';
export class LlfHeader {
    static readFrom(binary) {
        binary.readFloat32(); // version - always DANAE_VERSION
        binary.readString(16); // identifier - always "DANAE_LLH_FILE"
        const dataBlock = {
            lastModifiedBy: binary.readString(256),
            lastModifiedAt: binary.readInt32(),
            numberOfLights: binary.readInt32(),
        };
        binary.readInt32(); // number of shadow polygons - always 0
        binary.readInt32(); // number of ignored polygons - always 0
        const numberOfPolygonsInFTS = binary.readInt32();
        binary.readInt32Array(256); // pad - ?
        binary.readFloat32Array(256); // fpad - ?
        binary.readString(4096); // cpad - ?
        binary.readInt32Array(256); // bpad - ?
        return {
            ...dataBlock,
            numberOfPolygonsInFTS,
        };
    }
    static accumulateFrom(json) {
        const buffer = new ArrayBuffer(LlfHeader.sizeOf());
        const binary = new BinaryIO(buffer);
        binary.writeFloat32(DANAE_VERSION);
        binary.writeString('DANAE_LLH_FILE', 16);
        binary.writeString(json.header.lastModifiedBy, 256);
        binary.writeInt32(json.header.lastModifiedAt);
        binary.writeInt32(json.lights.length);
        binary.writeInt32(0); // number of shadow polygons
        binary.writeInt32(0); // number of ignored polygons
        binary.writeInt32(json.header.numberOfPolygonsInFTS);
        binary.writeInt32Array(repeat(0, 256)); // pad
        binary.writeFloat32Array(repeat(0, 256)); // fpad
        binary.writeString('', 4096); // cpad
        binary.writeInt32Array(repeat(0, 256)); // bpad
        return buffer;
    }
    static sizeOf() {
        return (BinaryIO.sizeOfFloat32() +
            BinaryIO.sizeOfString(16 + 256) +
            BinaryIO.sizeOfInt32Array(5 + 256) +
            BinaryIO.sizeOfFloat32Array(256) +
            BinaryIO.sizeOfString(4096) +
            BinaryIO.sizeOfInt32Array(256));
    }
}
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