For this AR project we are developing, I need to create a mesh that more or less works as a UI element despite being in 3D space. It scales to fit the screen to be as large as possible without cropping, no matter the aspect ratio or FOV. In the attached gif below you will see I have this all working already within the editor/PC build, and on a smartphone device before AR Session is enabled.
The problem is that in AR it seems I do not have access to the true FOV of the camera (as the FOV value of the pawn camera does not seem to update to reflect its overriden value once in AR). So my question is how do I get the true FOV value once in AR? Surely this information must exist SOMEWHERE???
Example of resizing to fit to screen.
The function I am using to achieve this.
Everything works, both on PC and on Smartphone, until I enable AR Session and then the resizing is totally wrong. All I need is to somehow access the correct field of view once in AR.
If anything is unclear, please let me know.