Breps cannot be trimmed or intersected

In my model, I found a lot of breps are not able to be trimmed( by other breps or curves ).
Does anyone have a similar issue before?
Attached the file…

BREP.3dm (67.5 KB)

Hi @Jack_Zeng,

You are working very far from the origin which can lead to many problems, especially on intersections

See: https://wiki.mcneel.com/rhino/farfromorigin

This might be the reason why, in your example file your curve and also the brep created from it are bad objects. (You can run the command _SelBadObjects to find those)

I did the following steps to make trimming work on your file:

  • Move everything closer to the origin
  • Ungroup your single curve twice
  • Explode the curve
  • Re-Join (Also check if it is still bad)
  • Delete original extrusion surface and re-create it from the now not bad curve
  • Trim

BREP.3dm (100.9 KB)

Hope to help…

Oh… I see, thanks lando