Bases: Extractor
Extractor for Maya USD Layer from mayaUsdProxyShape
Exports a single Sdf.Layer from a mayaUsdPlugin mayaUsdProxyShape. These layers are the same managed via Maya's Windows > USD Layer Editor.
Source code in client/ayon_maya/plugins/publish/extract_maya_usd_layer.py
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64 | class ExtractMayaUsdLayer(publish.Extractor):
"""Extractor for Maya USD Layer from `mayaUsdProxyShape`
Exports a single Sdf.Layer from a mayaUsdPlugin `mayaUsdProxyShape`.
These layers are the same managed via Maya's Windows > USD Layer Editor.
"""
label = "Extract Maya USD Layer"
hosts = ["maya"]
families = ["mayaUsdLayer"]
def process(self, instance):
import mayaUsd
# Load plugin first
cmds.loadPlugin("mayaUsdPlugin", quiet=True)
data = instance.data["stageLayerIdentifier"]
self.log.debug(f"Using proxy layer: {data}")
proxy, layer_identifier = data.split(">", 1)
# TODO: The stage and layer should actually be retrieved during
# Collecting so that they can be validated upon and potentially that
# any 'child layers' can potentially be recursively exported along
stage = mayaUsd.ufe.getStage('|world' + proxy)
layers = stage.GetLayerStack(includeSessionLayers=False)
layer = next(
layer for layer in layers if layer.identifier == layer_identifier
)
# Define output file path
staging_dir = self.staging_dir(instance)
file_name = "{0}.usd".format(instance.name)
file_path = os.path.join(staging_dir, file_name)
file_path = file_path.replace('\\', '/')
self.log.debug("Exporting USD layer to: {}".format(file_path))
layer.Export(file_path, args={
"format": instance.data.get("defaultUSDFormat", "usdc")
})
# TODO: We might want to remap certain paths - to do so we could take
# the SdfLayer and transfer its contents into a anonymous SdfLayer
# then we can use the copy to alter it in memory to our like before
# writing out
representation = {
'name': "usd",
'ext': "usd",
'files': file_name,
'stagingDir': staging_dir
}
instance.data.setdefault("representations", []).append(representation)
self.log.debug(
"Extracted instance {} to {}".format(instance.name, file_path)
)
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