Surface breaks after Boolean operation

Rhino Rhino for Windows
1

hi
i have an issue with a ploysurface that breaks after Boolean difference operation.
one of the surfaces seems to be there but it looks transparent at places.
tried:

  1. increase the file resolution
  2. explode the poly and join back again
    3 . other types of boolean
  3. mesh it and work with that
  4. same results on rh5 and rh6

any ideas ?
Thanks

surface%20issue
surface issue.jpg1333×444 47.8 KB

2

Hello - most likely the edges are self-intersecting or just breken - please post the objects before the Boolean operation if possible. You can probably fix the surface using

  1. ExtractSrf
  2. DupBorder
  3. UntrimAll
  4. Trim with the curves from 2.

-Pascal

3

thanks Pascal but sadly it doesn’t seems to work
i have attached the file if you have any ideas
Thanks

breaking surface.3dm (1.8 MB)

4

That usually indicates some sort of “invalid” surface–not actually identifiable as a bad srf in rhino, but something about it makes the program unhappy. try to rebuild the base geometry w/ planes or capping an open polysrf before boolean differencing it

5

it could be so…
As im working with polysurface that were morphed by “flow along a surface” and a lot of them…
but if i have to work around it so the geometry is simpler, i fear it wouldn’t get the desire effect.

thanks

6

Hello - the s-shaped thing is messy - you need too look closely but there are loops and stacked - coincident - control points - is that thing created as is or was it deformed at some point from a simpler original?

-Pascal

7

thanks - i can see it
it was deformed (flow along surface)