ClusterScript 特定方向に向ける (Z軸 +z方向を前とする)

aim.js

const rad2Deg = (r) => (r * 180) / Math.PI;

const aimAt = (pos, target) => {
  const dir = target.clone().sub(pos);
  const angleY = rad2Deg(Math.atan2(dir.x, dir.z)); // Y軸回転
  const d = new Vector2(dir.x, dir.z).length();
  const angleX = -rad2Deg(Math.atan2(dir.y, d));    // X軸回転
  return new Quaternion().setFromEulerAngles(new Vector3(angleX, angleY, 0));
};

使い方

const aimRotation = aimAt($.getPosition(), target);
$.setRotation(aimRotation);