Blender Git Commits

Alembic: CMake cleanup

No functional changes.

Merge remote-tracking branch 'origin/master' into temp-alembic-exporter-T73363-ms2

Alembic: keep references to the schema objects

These references are necessary for Alembic to have proper bookkeeping.
Without them, you get errors that a property `N` already exists when
exporting mesh normals.

Alembic: fixed time sample test

Alembic exporter: unit tests are compiling

Fixed merge error

Alembic: even nicer subsurf disable method

This is less dependent on the exact implementation of AbstractHierarchyIterator
and also avoids an evaluation of the subsurfs before they are disabled.

Alembic: nicer way to disable subdivision surfaces

Before exporting starts, subdivision surfaces are disabled. The old
Alembic exporter would do this temporarily for each frame.

Merge remote-tracking branch 'origin/master' into temp-alembic-exporter-T73363-ms2

Alembic: new mesh writer seems to work

Also extracted axis conversion functionality from `abc_utils.h`.

Alembic Export: Removed TODO

Fix crash when exporting

The OAlembic object was copied, and my assumption that this would work fine
was wrong.

Merge remote-tracking branch 'origin/master' into temp-alembic-exporter-T73363-ms2

Alembic export: use the export subset feature of the AHI

Abstract Hierarchy Iterator: allow exporting transforms OR shapes

The Alembic exporter allows different sampling rates for transforms and
for shapes. This is necessary, for example, to have control over motion
blur: when only using rigid objects, it's enough to export sub-frame
samples of transforms.

Cleanup: USD test, renamed `created_writers` to `writing_writers`

The map contains those writes whose `write()` method has been called, and
thus the old name `created_writers` was incorrect.

No functional changes.

Merge remote-tracking branch 'origin/master' into temp-alembic-exporter-T73363-ms2

WIP Alembic: got the new exporter building, but far from functional

The biggest hurdle to take now is to only write transforms on certain
frames, only shapes on others, and both on yet other frames.