Blender Git Loki

USD Import: fixed cherry-pick conflicts.

USD Import: missing include.

Added missing include when building without Alembic.

USD IO: fixed warnings.

USD Import: warning fixes.

USD Import: format fix.

USD Import: warning fixes.

Fixed warnings due to unused parameters and function.

USD Import: missing include.

Added missing include when building without Alembic.

USD IO: fixed warnings.

USD Import: remove instancing functionality.

Temporarily removing collection-based instancing
experimental feature to simplify the review of
the current patch (differential D10700).
Instancing can be added back in a future patch.

Merge branch 'usd-importer-T81257-merge' of https://gitlab-master.nvidia.com/omniverse/blender into omniverse

USD Import: removed obsolete code.

USD Import: USDMaterialReader refactor.

Broke up more complex code into multiple functions
and reduced the nesting level of conditionals.

USD Import: USDMeshReader fixes and comments.

Removed unused variables, fixed bug where polygon
geometry was being read twice, added comments.

USD Import: declared const parameter.

USD Import: USDMeshReader constructor fix.

Now initializing the is_initial_load_ flag to true.

USD Import: update comments.

Updated USDMaterialReader comments, now using C-style
comments.

USD Import: fixed warnings.

Removed unused function and now calling UncheckedGet() to
query shader diffuse color.

USD Import: declared parameters const.

USD Import: braces for if/else statments.

USD Import: declare local functions static.

This fixes compiler warnings.