2D version of Vector3.RotateTowards?

Questions & Answers
1

I’m making a 2D game, I’m using Vector3.RotateTowards to rotate a vector toward the wanted vector.

                Vector3 aimDirection = GameShmupController.instance.GetPlayerPosition() - GunPosition;
                currentShootDirection = Vector3.RotateTowards(currentShootDirection, aimDirection, rotateSpeed * Time.fixedDeltaTime, 0.1f);

this works as intended if the angle difference between aimDirection & currentShootDirection is small. However, if the player is behind the enemy, then the enemy will do a weird flip in 3D space. Instead of rotating around in the 2D space (x, y), the enemy will flip like a paper flip around to try to look at the player.

How do I rotate this vector currentShootDirection toward the vector aimDirection in 2D space only?

2

gonna answer it myself OTZ

            Vector3 aimDirection = GameShmupController.instance.GetPlayerPosition() - GunPosition;

            float angleDif = Vector2.SignedAngle(aimDirection, currentShootDirection);
            currentShootDirection = Quaternion.AngleAxis(Mathf.Min(rotateSpeed, Mathf.Abs(angleDif)) * Mathf.Sign(angleDif), -Vector3.forward) * currentShootDirection;