KatanaToUsdEngine

The KatanaToUsdEngine is designed to take an input Geolib3 OpTree, and convert a subsection of the hierarchy into USD data.

The routine of this engine is to deserialize a serialized OpTree, and traverse the Geolib3 scene tree starting from the provided location EngineArg. The MaterialResolve op is added

The top level process for how the engine itself works and interacts with the PrimDecorator plug-ins is as follows:

1. Each location beneath the provided location is traversed. If that location is within the the ignore location paths set it is skipped and traversal continues.

2. If it does not match, the PrimDecorator’s are retrieved from the PrimDecoratorRegistry which match the location’s type attribute. These are returned in a specific order depending on the order the PrimDecorators were registered with.

3. These PrimDecorators are then run in the aforementioned order.

4. This is then followed by any primDecorators registered against the * location type. Again, in the order in which they are returned from the PrimDecoratorRegistry

5. Once all locations have been traversed. The processed locations are re-traversed and steps 3. and 4. for any PrimDecorators registered with the postProcess: location type prefix.