Scripting Helpers is winding down operations and is now read-only. More info→

How to make a GUI rotate towards a pixel position?

Asked by

coo1o 227

11 years ago

Anyone familiar with CFrame.new(position, pointAtposition)? It changes a part's position and look straight at another part. Now obviously CFrame.new doesn't work with GUIs. A few months ago the Rotation property was introduced to GuiObjects which rotates GUI's. Ok so the problem here is that I have no idea how to rotate a GUI towards a position on the screen (In pixels, not scale). I am making a game where when you click somewhere on the screen, a little GUI "plane" rotates towards it and move to the location. Also, would the rotation be entered as a normal number or with math.rad?

~Thank you

1 answer

Answered by

adark 5487

11 years ago

Basically, you want to calculate the angle between two arbitrary points on a 2D plane.

This code will do just that:

1function getAngleInDegrees(point1, point2)
2    point2 = point2 - point1
3    angle = math.atan2(point2.y, point2.x)
4    return math.deg(angle)
5end

So, say, I had an Arrow ImageLabel I wanted to point towards a Frame.

`1`	`ImageLabel.Rotation` `=` `getAngleInDegrees(ImageLabel.AbsolutePositon, Frame.AbsolutePosition)`

It works perfectly! Thanks :D coo1o 227 — 11y

How to make a GUI rotate towards a pixel position?

1 answer

Answer this question