terrain50-cli/src/Subcommands/shift/index.mjs

35 lines
1013 B
JavaScript

"use strict";
import fs from 'fs';
import l from '../../Helpers/Log.mjs';
import Terrain50 from 'terrain50';
export default async function(settings) {
if(typeof settings.cli.input !== "string") {
l.error("Error: No input file specified (try --filename path/to/heightmap.asc)");
process.exit(1);
}
if(typeof settings.cli.output !== "string") {
l.error("Error: No output file specified (try --filename path/to/output.asc)");
process.exit(1);
}
if(typeof settings.cli.min_value !== "number") {
l.error("Error: No new minimum value specified (try --min-value NUMBER_HERE)");
process.exit(1);
}
l.log(`Reading input files`);
let heightmap = Terrain50.Parse(await fs.promises.readFile(settings.cli.input, "utf-8"));
l.log(`Shifting values`);
let shift_amount = heightmap.shift(settings.cli.min_value);
l.log(`Shifted values by ${shift_amount}`);
l.log(`Writing result to disk`);
await heightmap.serialise(fs.createWriteStream(settings.cli.output));
l.log(`Shifting complete!`);
}