Blender Git Loki

USD IO: MDL options for UMM.

Added logic to conditionally display MDL
import/export options depending on whether or
not the UMM addon Python module can be loaded.
Also, renamed the Convert Cycles Node Graph
import option to Convert to USD Preview Surface.

USD IO: USD_umm_module_loaded() function.

Added function to determine if the Universal Material Mapping
(UMM) addon Python module was loaded successfully. Also
added conditional compilation directives when WITH_PYTHON
is defined.

USD export: export MDL textures.

Added logic to support exporting textures for
MDL materials.

USD export: get_texture_filepath() function.

Moved logic for computing texture paths into dedicated
get_texture_filepath() function.

USD IO: format fixes.

USD IO: Removed unused UMM code.

Removed unused Blender shader node creation functions.
Replaced USD_UMM class with standalone UMM conversion
functions.

USD Import: format fixes.

USD Import: backward compatible light attributes.

Light attributes in USD v21.02 now have an inputs:
prefix (e.g., inputs:color, inputs:intensity, etc.).
Added logic to also read light attributes using the
old naming scheme (without the inputs: prefix)
for compatibility with older USD versions.

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

USD export: invoke UMM to generate MDL.

Added logic to invoke the UMM Python module to
export MDL materials.

USD Import: remove mesh modifier duplicate code.

Refactored the mesh sequence cache modifier logic
to reduce duplication in the code paths for the USD
and Alembic formats.

USD Import: merge prim with parent xform.

Added logic to merge a USD prim and its parent
Xform into a single Blender object representation.
Added a USDXformReader::use_parent_xform_ flag
which, if true, causes the USDXformReader to
use the parent of the encapsulated prim to compute
the object's transform.

USD Import: UMM logic update.

UMM conversion code now invokes Python
omni.universalmaterialmap.blender.material.apply_data_to_instance().

USD IO: merging latest omniverse branch.

USD Export: Light Intensity Scale option.

Replaced hard-coded light intensity scaling with a
user specified light_intensity_scale export option.

USD Export: format fixes.

USD Export: backward compatible light attributes.

Light attributes in USD v21.02 now have an inputs:
prefix (e.g., inputs:color, inputs:intensity, etc.).
Added logic to also output light attributes using the
old naming scheme (without the inputs: prefix), so that
applications built with older USD versions can recognize
these attributes.

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

USD Import: warning fixes.

USD Import: format fix.