Allow saving bcres file as bch (and vice-versa)

[RocketRobz]

SPICA is able to open a bcres file and save as a bch file, but only up to v33, so trying to import the SPICA-saved bch file into CTR-Studio, changing the version to the correct version (v34-v35, in this case), saving, and importing into the game, it's unable to display the file. It seems SPICA is somehow not save the file correctly.

An alternative without SPICA is exporting the bcres model as dae and then importing into a new bch file, which works, but then features such as layering and others would need to be fixed manually to match the original bcres file, which is a tedious process. Animations are not imported as well.

Because of all that, I would like to see a feature where after opening a bcres, it can be saved as a bch file for the games which only support them (and vice-versa).

[KillzXGaming]

It should now support saving as .bch, but not back (which I probably will not bother with). Can just save with the .bch extension and it will save as BCH v33 by default, but you can reopen and change it. 1c11d5d

[RocketRobz]

Tried the new feature, and it seems some information for materials such as texture UV, texture filtering, and rendering info aren't ported over correctly.

Here's a UV comparison:

Correct (in the original bcres and dae-imported bch files):

Incorrect (in the new bch file saved from the bcres file):

Also, the vis node names in mesh info aren't ported over, and are left blank.

Here's the bcres file I use for testing: CR_BG_72.zip

The game is still unable to display it (might be caused by the incorrect UV), and can only display the dae-imported one.