Hello,

I cannot trim or split this planar surface,

I put the file in annexe,

Pb_split_Surf.3dm(364.6 KB)

any idea?

thanks

Hmm- seems OK here- do you get a closed curve if you Intersect the two objects? What build of Rhino (help > About Rhinoceros)?

pb_split_surf_PG.3dm(367.8 KB)

-Pascal

Hi Pascal,

when I intersect, I get " Open polycurve with 11 curve segments.".

this is strange because I extruded that surface from a closed curve (actually it was an open curve but I blended them and joined into 1 curve)â€¦mmhâ€¦

Kind Regards,

PS:I use Rhino 4

PS2: the details of the curve from which I extruded that polysurface:

Geometry:

Valid curve.

Closed polycurve with 116 curve segments.

Segment 1:

Open NURBS curve

start = (-3992.9,-8461.57,9010)

end = (-3992.9,-8461.57,9010)

degree = 5

control points: non-rational, count=6

knots: uniform (delta=1), domain = 0 to 1

clamped at start and end

Segment 2:

Open NURBS curve

start = (-3992.9,-8461.57,9010)

end = (-4774.83,-8141.18,9010)

degree = 3

control points: non-rational, count=12

knots: non-uniform, domain = -845.119 to 0

clamped at start and end

Segment 3:

Open NURBS curve

start = (-4774.83,-8141.18,9010)

end = (-5453.9,-7822.36,9010)

etcâ€¦