The `check_is_animated()` function will be used by the upcoming Alembic
exporter as well. There is nothing USD-specific in the function.
No functional changes.
The code was copied from the Alembic exporter, and some of the options are
no longer used.
Not updating the Alembic exporter itself, as this will be done in a much
larger rewrite.
printf is called for a size_t (64 bit on x64) type
but the formatter is `%lu` (32 bit) leading to a
warning with MSVC.
`%zu` is the appropriate formatter.
I've added a very minimal mesh validation before the Alembic mesh is actually
converted to a Blender mesh. This prevents a specific crash with an example
file attached to T74200.
In rB7c5a44c71f13 I changed the way transform matrices are loaded from
Alembic. Instead of having the Alembic importer convert matrices from
local (in the Alembic file) to World (to pass to the constraint handling
the animation of transforms), I set the constraint space to
`CONSTRAINT_SPACE_LOCAL`.
This worked thanks to rB7728bfd4c45c. However, that commit was reverted,
which meant that for parentless objects `CONSTRAINT_SPACE_LOCAL` no
longer means "local space".
The situation is resolved by setting the constraint to world space
again, and computing the world matrix in the Alembic importer.
This moves the `alembic`, `avi`, `collada`, and `usd` modules into a common
`io` directory.
This also cleans up some `#include "../../{somedir}/{somefile}.h"` by
adding `../../io/{somedir}` to `CMakeLists.txt` and then just using
`#include "{somefile}.h"`.
No functional changes.
Bastien Montagne
Campbell Barton
Sybren A. Stüvel
Ray Molenkamp
Dalai Felinto