[MESH EDITOR] Add option to enable backface selection

[KingOfTheFBI]

Describe the bug

At certain angles selecting verts/edges that should be selectable is not possible as shown in the video below. Ideally, if an edge/vert is visible one should be able to select it.

https://github.com/user-attachments/assets/6a4e75b3-483b-40cf-b19b-553cf7a327b9

To Reproduce

Replicate the video above

Expected behavior

Edges/verts are easily selectable

Media/Files

No response

Additional context

No response

[aylaylay]

https://github.com/user-attachments/assets/2eaba31d-5ccb-4432-b103-7ac9234ac7d5

[KingOfTheFBI]

sbox-dev_nw6iPrOyVg.mp4

Try it with the edge tool, that is the main thing. I know verts can be weird with it in hammer too

[Retroeer]

You have backface selection on in Hammer, I presume

[Retroeer]

https://github.com/user-attachments/assets/19a74399-9996-46b3-aeed-c25bf1cf6eac

[KingOfTheFBI]

sbox-dev_OWDnj95qws.mp4

I never have backface selection on, just forget about the verts if we're going 1/1 hammer, edges are the main thing that is weird. You should be able to select the top right edge in scene like hammer

[Retroeer]

Yeah seems like it doesn't work in that case

[Retroeer]

Weird that Hammer allows that for edges but not for verts, does anyone actually rely on that? Would be something to one up Hammer on

[KingOfTheFBI]

Weird that Hammer allows that for edges but not for verts, does anyone actually rely on that? Would be something to one up Hammer on

Yeah selecting verts has always been kinda funky in the 3d view, even with lasso it just won't get all of them sometimes even with backface selection on if they overlap.

[aylaylay]

https://github.com/user-attachments/assets/452f5ce4-dbf8-4945-81c4-c5551a740992