How to use

ProcessEnv

function

in

1/process

heightmap({ noise, types }) {
  if (!process.env.HEIGHTMAP) {
   console.error('Must provide a HEIGHTMAP if you want to use the heightmap generator.\n');
   process.exit(1);
  const heightmap = PNG.sync.read(fs.readFileSync(process.env.HEIGHTMAP));
  const heightOffset = {
   x: Math.floor(heightmap.width * 0.5),