blitzkit/src/core/math/normalizeAngle180.ts

export function normalizeAnglePI(angle: number) {
  const newAngle = angle % (2 * Math.PI);
  if (newAngle > Math.PI) return newAngle - 2 * Math.PI;
  if (newAngle < -Math.PI) return newAngle + 2 * Math.PI;
  return newAngle;
}