GUI in 3D broken in deeply confusing ways

Throckmorpheus

I'm working on a game wherin nearly all the menus are on the surface of meshes like phone screens and the like, and I've been working off of the Gui in 3D demo. Originally I was having trouble with the fact that it wasn't scaling between the viewport and the window, but even now that I've solved that it keeps getting broken in increasingly inconsistent and hard to comprehend ways. Certain things can only be clicked on from certain angles, things stop working after an arbitrary distance (which varies per menu), input can be working and then just drop off and not work until you pause and unpause. V-Sliders specifically break it every time you mouse over them

I've been trying to get this to work for a month now, and this is a school project with a hard deadline so I can't just fiddle away with it forever. Does anyone have any experience with 3D GUI? I'm very lost at this point

TwistedTwigleg

Welcome to the forums @Throckmorpheus!

I have some experience with 3D GUI, as I updated the GUI in 3D demo to work with Godot 3.0, back when it first came out. That said, I haven't touched the demo in over a year, so... yeah. I can try to help though with my limited experience. What issues are you having currently?

A couple things to right off that might be causing issues: Were you scaling the plane/quad the 3D GUI is attached to? If so, you may need to multiple quad_mesh_size by the scale of the MeshInstance node, so it can convert the 3D position from the raycast to the 2D position on the Viewport. I'm not sure if the demo was tested to work with scaled MeshInstance nodes. The code expects the Viewport and Quad/Plane to always be square, from what I remember. If you have a non-square Viewport or Quad/Plane, I would suggest making it square and just adding padding to the Viewport so it appears rectangular. * Are you using a Billboard material? Unfortunately I don't think we ever found a way to get billboard materials working in the demo, so you may need to rotate the MeshInstance manually through code if you need it to always face the player.

Also, if any of the issues you are having can be reproduced with the GUI in 3D demo from GitHub, could you please make an issue on the GitHub repository detailing the issue(s) found? That way, other users who look at the demo will know of the issue(s), as well as then the issue can (hopefully) be fixed for the demo as well.