BIFROST-9565 - Add nested Variant Sets support.

Allow to create a VariantSet inside an existing VariantSet on its prim. It changes the set_variant_selection operator behavior. Previously the "clear" parameter was used to mimic a clear variant set. In the new implementation, the "clear" parameter clear the current variant selection and add a new one in current VariantSet. To only clear the variant selection without setting a new one, use the clear_variant_selection operator.

This change allow users to create a variant set and a variant by just specifying it in the Variant Selection section of the define_usd_prim. Creating a define_usd_variant_set on the parent prim is needed only to set the variant selection in a particular variant set.

BIFROST-9637 - Add clear_variant_selection operator.

BIFROST-9638 - Add "Variant Selection" group in define_usd_curves and define_usd_point_instancer compounds.

BIFROST-9611 - Add get_prim_kind operator.

BIFROST-8154 - Add get_prim_attribute_type operator.

BIFROST-8099 - Add get_applied_schemas operator.

BIFROST-9186 - Add applied_schema_names parameter to the define_usd_prim compound. You can pass coma-separated names of USD Applied API Schemas.

BIFROST-9674 - Add define_usd_geom_subset compound.

BIFROST-9686 - Add UI logic on define_usd_mesh to disable "Subdiv" when "Normal Per Vertex" is enabled.

BIFROST-9673 - Add USD graphs and scenes to Bifrost Browser.

BIFROST-9770 - Add the "Bifrost USD Examples" plugin for Maya showing how Bifrost USD can be used to create high level workflows like:

• Creating a Bifrost graph dedicated to USD workflows.
• Importing a Maya hierachy in a Bifrost Graph as USD prims.
• Creating a USD variant from a Maya hierarchy.
• Creating a USD Model Component with variants from multiple USD files.

In the install folder of the project, you will find the bifrostUSDExamples.mod file in "examples/maya_plugin". You will need to add its directory path to your MAYA_MODULE_PATH environment variable. An easy way is by editing the Maya.env file in your user preferences as bellow:

MAYA_MODULE_PATH=<your Bifrost USD install path>\examples\maya_plugin

BIFROST-9608 - Fix wrong parameters layout order in the Variant Selection group.

The variant_set_name and variant_name parameters order is changed in the define_usd_prim and define_usd_mesh compounds.

BIFROST-9056 - Collapse ports grouping on the define_usd_prim_attribute compound.

BIFROST-9334 - Remove compound duplicate in save_usd_stage.json file.

BIFROST-9354 - USD File Format Option

Add parameter to set a the USD layer format to ASCII or binary. Useful to save in human readable format and still keep the .usd extension.

BIFROST-9334 - Add get_edit_layer operator

This node returns the stage's EditTarget layer.

• Update the save_usd_stage compound. It is now setting the target layer to the root layer before saving and then restore the current target (using the new get_edit_layer operator).

BIFROST-8077 - Add support for half and matrix attribute types

BIFROST-8574 - Add anchor_path parameter on add_reference_prim and add_payload_prim

By specifying an "anchor_path", the identifier of the referenced layer will not include such anchor path in the reference list.

BIFROST-8424 - Add slider and color picker on ops

BIFROST-9008 - Add set_layer_permission node

To be used for the very specific scenario when you need to reference a layer that needs to be modified by an other runtime than Bifrost.

For example, if a stage generated by Bifrost references a "file based" layer storing some USD materials who should be authored in the LookdevX Editor, it would not work by default. This is because in order to keep the referenced layer "file based", the "read only" mode would need to be enabled in the open_layer node. If not in read only mode, the opened layer ("file based" layer) would be automatically copied into an anonymous layer by Bifrost USD (to avoid side effects) and so would not be editable in LookdevX in a persistent way (as the layer identifier would change at every execution of the graph).

The node graph to open a layer in Bifrost and let it be editable outside should look as following: open_layer (with read_only "on") -> set_layer_permission (with read_only "off") -> add_reference_prim

The open_layer node will call the BifrostUsd::Layer constructor that is "opening or finding" the USD layer using the file path as an identifier (and will not create an anonymous layer, because of the read only mode). The set_layer_permission will allow the layer to be editable and will not output an anonymous layer.

BIFROST-8788 - Use for_each in define_usd_mesh

BIFROST-7769 - use getEnv*() functions from public Executor SDK

BIFROST-8199 - Use ConfigEnv instead of Object to get config from environment

BIFROST-3401 - Use new API for FileUtils::getRelativePath.

BIFROST-9067 - Fix connection order when creating an add_to_stage node 'on the fly'

BIFROST-8826 - fix random test failures on Windows

• Layer::exportToFile() now uses SdfLayer::New() instead of CreateNew(). This prevents a temporary and default file to be created on the disk before the final exported file is actually written. On Windows, when Pixar USD is writing an initial file and almost immediately attempts to replace its content by renaming another file to such initial file, an "access denied" error can occasionally occur; eliminating the temporary file on the first place by not calling CreateNew() avoids this error.
• Each unit test file now outputs its exported files into its own unique folder, avoiding completely the possibility that two concurrent tests from different test files would attempt to export to the same file. These unique output folders are deleted as a first phase for each test file, allowing tests to assume and check that an output file is not already on disk before it is being exported.
• Some tests were previously just lucky to succeed, as they were exporting a root layer and sublayer to disk, but the sublayer was actually exported into the default output folder, not into the expected folder, and since the sublayer file was already saved to disk by another test case, the test assumed that everything went fine. Such test cases are now fixed or were removed (if not fixable).
• Tests do not export initial files first, then replacing these by final file content, and finally checking the final file for some expected content. This was also occasionally causing "access denied" errors, as described above.
• add README.md in test folder

BIFROST 8452 - Add color support to the read_usd_curve and improve define_usd_curves UI

• Add option in read_usd_curves to import displayColor attribute as point_color geo property.
• Add Combo Box in define_usd_curves to set basis and type parameters.

BIFROST-8452 - Add option in read_usd_meshes to import displayColor attribute as point_color geo property

BIFROST-6771 - Add soft min-max sliders and color pickers widgets in following compounds

• define_usd_display_color
• define_usd_point_instancer
• define_usd_preview_surface
• define_usd_transform
• duplicate_usd_prim_definition

BIFROST-8319 - Add get_authored_attribute_names node, to get all authored attributes names

BIFROST-8100 - Add get_all_attribute_names node, to get all prim attributes names

BIFROST-8426 - Inconsistent UI in define_usd_prim

BIFROST-8273 - fix sublayers not saved if relative_path is on

• Use the layer's save file path (m_filePath) instead of the sdfLayerIdentifier in the recursive call to Layer::exportToFile().
• Add new more complete unit test for export_layer_to_file() that covers multiple cases for relative and absolute paths to sublayers.
• removed call to changeDir() that has side effect and is not required anymore for unit tests.

BIFROST-8068 - do not run test_graphs.py when system processor is not in target arch.

BIFROST-8073 - update calls to xcrun to support latest xcode/macos

BIFROST-8065 - add support to build for desired binary architecture on OSX

BIFROST-7845 - Add test loading all compounds

• add_applied_schema: This node adds the applied API schema name to the apiSchema metadata of the prim
• remove_applied_schema: This node removes the applied API schema name from the apiSchema metadata of the prim