Getting the 2D Screen position of a Viewport object

[bjarkibjarki]

I am working on a boardgame which uses a viewport for the die-rolling visuals. When the dice lands, I want a number to appear above it (as a UI). This is easy enough to do on one screen size, but because I want to support a variety of screen sizes, I’d like to be able to accurately find the screen position of the die object, which I currently do not know how to do.
I’ve tried using WorldToViewportPoint and WorldToScreenPoint (using viewport camera and die position) but they did not seem to work as intended for viewports.
If anyone has any idea on how to implement this, please let me know

Example image for Mobile

Example image for PC

Looks fine on mobile but not on PC.

[StraightScared (Straight)]

UI has a property called absolute position, which takes the screen size into account.

Absolute position

Do you mean like this? [image]

and here is how you would take the viewports absolute positions and tell where the number should go.

Ability to write to AbsolutePosition

As a roblox developer it’s currently hard to position GUIs nested deep inside of other GUIs in respect to the ViewportFrame. You have to do the math through each set of parents with Scale/Offset to get a GUI object to do this. It would be really helpful if I could write to AbsolutePosition & it would change the Offset position of the GUI object accordingly.

[ketrab2004 (ketrab)]

The viewport size for cameras for a viewportframe is 1,1 when using WorldToViewportPoint and WorldToScreenPoint.

So here’s a way to convert it to something usable:

WorldToViewportPoint does not work as intended

Oh I see now, this is a Camera in a ViewportFrame. It does indeed not work correctly in this case because the Camera object’s ViewportSize is treated as (1, 1) (The Camera doesn’t correctly pick up the ViewportFrame’s size) The reason it kind of looks like it’s returning a Scale, is that for a ViewportSize of (1, 1) the offset returned effectively is a scale, but the aspect ratio is off because it’s using a 1:1 aspect ratio for the calculation rather than the one your viewport actually has. Yo…

[bjarkibjarki]

That works great and is exactly what I need. Thank you.