I can’t blend a surface between the two curves because it shows that the curve is not a complete curve.(like the below pic)
however, when i click it without blending it, it appears to be a closed curve.
please help.
1026.3dm (142.7 KB)
however, when i click it without blending it, it appears to be a closed curve.
Dear User12 - it s always nicer to talk to a real person s name ?
you are talking about
_blendSrf ?
and you use it with position continuity ?
you can drag start end endpoint of _blendSrf to only use a section of an edge. this might be a bit tricky.
it might be easier to use
_mergeEdge
_mergeAllEdges
_splitEdge
to modify the segmentation of the edge (as long as there is G1 / tangent continuity )
does this help ? - kind regards -tom
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To add to @Tom_P’s advice, there’s also the ChainEdges option in BlendSrf to help you.
-Jakob
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I would simply extrude the original curve profile that was used to split the cylinders, then split it by the latter. As simple as that. 
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Hi, I Merged the edges and they appear to be a complete curve.
However, when i want to click the edge to blend a surface, i can only select half of the curve.
I can only do it separately. First a half then the other.
merge
after _mergeEdge i can (sub-) select like this:
sub-select = cltr shift left klick (pc) or cmd+shift + left click (mac)
_blendSrf inital
the inital BlendSrf looks like this
_blendSrf add shapes
then you have to add shapes to match corresponding edges (end-snap, perpendicular snap)
alternatives
i think Bobi s workflow is also nice - did you try it ?
if you need a surface that is perpendicular to the outer surface - there is _fin command.
kind regards -tom
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yes i did tried Bobi’s workflow.
Thank you for your detailed reply, Tom.