Function roundDown

packages/react-stately/src/color/useColorWheelState.ts:85–92

(v: number)

}

function roundDown(v: number) {
  let r = Math.floor(v);
  if (r === v) {
    return v - 1;
  } else {
    return r;
  }
}

function degToRad(deg: number) {
  return (deg * Math.PI) / 180;