gistfile1.txt

static norm(value, min, max) {
  return (value - min) / (max - min);
}

static lerp(norm, min, max) {
  return ((max - min) * norm) + min;
}

static map(value, sourceMin, sourceMax, destMin, destMax) {
  return this.lerp(this.norm(value, sourceMin, sourceMax), destMin, destMax);
}