Convert mesh with NGons to Brep

Petras_Vestartas · November 24, 2021, 4:13pm

Hi,

Is there a Rhino command that converts mesh with ngons to a brep?
Or can I extract outline from with ngon as a rhino command?

I have a following case:

meshngon.3dm (315.5 KB)

pascal · November 24, 2021, 4:17pm

Hello- try:

Explode

DupBorder
SimplifyCrv on the results - still selected
PlanarSrf

Join the resulting faces.

-Pascal

Mahdiyar · November 24, 2021, 4:21pm

Another solution much slower than what @pascal recommend:
ToNNURBS
MergeAllCoplanarFaces

Mehraneftekari · November 24, 2021, 4:24pm

Hello, you can do the same in Rhino 8
With the MeshToNURB command!!!UseNgons=Yes

pascal · November 24, 2021, 4:29pm

Yep, a good one too - the downside there is that the face edges are split up where the internal ngon polygon edges are. Not the end of the world but something to be aware of.

-Pascal

Petras_Vestartas · November 24, 2021, 5:59pm

Thank you all, works like a charm;)

I use this macro for now:
_Explode
_MultiPause
_SelLast
_DupBorder
_MultiPause
_SelLast
_SimplifyCrv
_MultiPause
_SelLast
_PlanarSrf
_MultiPause
_SelLast
_Join

pascal · November 24, 2021, 6:14pm

Try without the MultiPause entries - I am not sure what those are doing.

-Pascal

Petras_Vestartas · November 24, 2021, 6:41pm

Thanks this seems to work. What does the exclamation mark do in macros?
And is there any way to export or save a custom bar with these four buttons?

!
_Select
_Pause
_AddNgonsToMesh
_SelLast
_Explode
_SelLast
_DupBorder
_SelPrev
_Delete
_SelLast
_SimplifyCrv
_SelLast
_PlanarSrf
_SelPrev
_Delete
_SelLast
_Join