With this, we are able to get rid of all the increasingly broken file
system utility code, and trust std::filesystem to handle all the cross-
platform complexity.
Unfortunately std::filesystem support remains a little elusive; it is
well supported in Visual Studio (especially 2019), but not by default
in Mac OS X, and even in GCC 8.0 it requires an explicit '-l c++fs'.
This also silences some of the more egregious compiler warnings, mostly
by being explicit about where we cast to the uint32 types glTF prefers.
This is a recreation of the PR @robertlong submitted long ago here:
https://github.com/facebookincubator/FBX2glTF/pull/97
Refactors and whitespace conflicts made this easier.
There is still a substantial rewrite of the texture-loading and
file-path handling pending, for sometime soon.
Did not mean to commit/push the current state of master. But rather than
mess up source control history with a force push, I'll just try to hurry
to a stable point.
Pär Winzell
Par Winzell