Calculate texture scale and offset for brushes.

[Nieblist]

• Map face vertex UVs to VMF UV axes with shift and scale for brushes. Shift and scale are based on texture image size, so use a material with only one image texture to get the right mapping.
• Add an "Allow Skewed Textures" option in the map export panel to keep non-perpendicular UV axes intact, otherwise it will modify the V axis to make them orthogonal.

[Nieblist]

Hi reviewers. Please note that the Allow Skewed Textures option is not working for all cases right now. It seems to be flipping some textures or otherwise having some issues.

I decided to keep it because it can be useful (I'm using it for my map), but if you prefer I can remove it for now and create another PR in case I find a way to fix it.

[Nieblist]

Hi @bonjorno7, please let me know if there is any reason not to merge this. It has been pretty useful for my map. Do you prefer me to remove the "Allow Skewed Textures" option and keep only orthogonal mappings?

(This is for issue https://github.com/bonjorno7/SourceOps/issues/79)

[bonjorno7]

Hi @Nieblist sorry for the wait, I've been busy lazy. I'll post a review in a bit.

[bonjorno7]

Oh and I'm fine with keeping the skewed textures option, even if it isn't perfect (the rest of the addon isn't either).

[Nieblist]

Cool! I'll keep it as it is for now then and come back at it if I have time. Please let me know if you find anything else.

[Nieblist]

Hi @bonjorno7! Sorry to bug you, I'm just pinging you again in case we can merge this :)

[bonjorno7]

Oh sorry I forgot, will take a look and maybe merge tomorrow.

[Nieblist]

Nice, ok!

[bonjorno7]

Sorry for being so unavailable, I should be better. Everything looks good now, and seems to work fine from my testing, so I'll merge. Thank you for your contribution!

[Nieblist]

Happy to help, thank you for the plugin!