twitching on surrounding objects when following an instance with a non integer speed

https://github.com/user-attachments/assets/357b0daf-6b95-464c-800c-c22a741448c7
when perfectly tracking an object with non integer position all other instances can appear to twitch.

solution seems to be to round the follow x and y position.

Though since it's rounding there's probably some other smooth_draw related code that can changed or outright removed