Question: How to determine whether the drawn content is a whole？

[ghost]

example:

I used Plane and Raycaster to catch scene objects

but I don't know how to determine if they are a whole.

I checked dxf-parser source code.

I didn't find any relevant and available data from the parsed data, or I may have missed it.

[ghost]

Do you have any good methods or ideas?

[vagran]

but I don't know how to determine if they are a whole.

I cannot really understand the meaning of this phrase.
If this is about DXF features picking, yes, now most of information about initial DXF structure is lost during rendering batches assembly for the sake of performance. This is planned to be revised in next major release.