Getting the component that contains an occurrence?

[JesusFreke]

I can't seem to find any good way to find the component that contains an occurrence. The only relevant thing I see is Occurrence.fullPathName, and I guess you could parse the names and traverse the Occurrence tree.. but it seems like there's got to be a better way? Is this just something that's currently missing in the API, or am I missing something?

[JesusFreke]

Actually, I just realized it could be either an Occurrence or a Component that contains an occurrence, e.g. if it's an Occurrence from Occurrence.childOccurrence. But in any case, it seems like it would be useful to be able to traverse up the tree, as well as down. 

[p.seem · Accepted solution]

I think the property you're looking for is assemblyContext.

That will return the occurence that 'contains' the occurrence (if there is one), from which you can access the component.

[JesusFreke]

Ah, I had missed that, thanks. It doesn't look like you can use assemblyContext to get the component that contains an occurrence though.

e.g.

parent_occurrence = root().occurrences.addNewComponent(adsk.core.Matrix3D.create())
mybox = box(2, 2, 3, name="mybox")  # creates a new component under root and adds a box body created from TemporaryBrepManager
mybox.moveToComponent(parent_occurrence)

print(mybox.assemblyContext)

----

None

But in any case, I think I use occurrence.createForAssemblyOccurrence whenever I create a new component, and return that occurrence instead of returning the "raw" occurrence that doesn't have an assembly context. That way I'll only be dealing with occurrences with an assemblyContext, so I can properly traverse up the tree when needed. Although, I guess I can't use that trick for occurrences contained by the root component. But I can just treat assemblyContext = None as a special case, and know that the container is root in that case.

parent_occurrence = root().occurrences.addNewComponent(adsk.core.Matrix3D.create())
mybox = box(2, 2, 3, name="mybox")  # creates a new component under root and adds a box body created from TemporaryBrepManager
mybox.moveToComponent(parent_occurrence)
mybox = mybox.createForAssemblyContext(parent_occurrence)

print(mybox.assemblyContext)

----

<adsk.fusion.Occurrence; proxy of <Swig Object of type 'std::vector< adsk::core::Ptr< adsk::fusion::Occurrence > >::value_type *' at 0x0000022E0FA854B0> >

I'd still be interested to know if there's a good way to find the containing component of the "native" occurrence, but I think the above workaround should be workable at least.