sc4/lib/core/terrain-flags.js

A command line utility for automating SimCity 4 modding tasks & modifying savegames

import FileType from './file-types.js';
import { kFileType } from './symbols.js';
import { isLittleEndian } from 'sc4/utils';
import WriteBuffer from './write-buffer.js';
// # TerrainFlags
// A data structure that holds which terrain tiles get rendered.
export default class TerrainFlags {
    static [kFileType] = FileType.TerrainFlags;
    major = 0x0001;
    raw;
    parse(rs) {
        this.major = rs.word();
        let buffer = rs.readArrayBuffer();
        let size = Math.sqrt(buffer.byteLength / 2);
        let raw;
        if (isLittleEndian()) {
            raw = new Uint16Array(buffer);
        }
        else {
            raw = new Uint16Array(size ** 2);
            for (let i = 0; i < raw.length; i++) {
                raw[i] = rs.uint16();
            }
        }
        this.raw = raw;
        rs.assert();
        return this;
    }
    toBuffer() {
        const ws = new WriteBuffer();
        ws.word(this.major);
        for (let i = 0; i < this.raw.length; i++) {
            ws.uint16(this.raw[i]);
        }
        return ws.toUint8Array();
    }
    clear() {
        this.raw.fill(0);
        return null;
    }
}