Subtraction overflow in build_escape_pod

[dodomorandi]

Running the game in debug triggers a subtraction overflow at nox_planet/src/region/builder/buildings.rs:21:26 (and obviously the following line is affected as well). I imagine that the intended behavior is to overflow and take the modulo of layer height/width, right?

I can send you a PR if you want, I know that this is you personal project, so I am happy to give some tiny help and I don't get offended if you say no ☺️

In any case, I listened to the podcast in which you were talking about this project. Really, really awesome work! Thank you for your efforts and your passion ❤️

P.S.: I just changed the initialization process to use wgpu::BackendBit::DX12 to wgpu::BackendBit::PRIMARY to make it work on Mac, everything seems fine!

P.P.S.: Uh, it looks like there are some similar issues around, I just got another overflow in nox_planet/src/region/builder/flags.rs:85:43 -- these are tricky to find without the overflow checker at runtime (almost impossible in C++ 🙄).

[thebracket]

Sadly, there are a few overflows (the rivers code is particularly bad). Right now, it's a 1:1 port of a lot of C++ code - so I'm tracking those down. I'm working away in a branch that will change the structure of some of the project (it grabs the latest WGPU and Legion, which require a lot of reworking anyway). My plan is to get to these issues once that is a bit more solidified.

Thanks - and I'm glad you're enjoying it. :-) (I do have a bad habit of running it in Release mode for speed and not seeing all of these pop up)

[thebracket]

The current build needs some other work (I'm finding that array textures aren't working out side of Vulkan land), but it should have fixed the overruns!