How to create a surface
Surface Deck.3dm (38.9 KB)
without cutting the curve Deck Edge?
Thanks in advance
one way is to break the crv up and make it from 2 surfaces as shown below-
a 2nd way is to use patch
there will be differences in the surfaces so examine the results based on your needs-
Yes, I know the split way (Cutting the curve Deck Edge)..
I avoid Patch function because the hidden control points.
Anyway Thanks very much for you answer!
The other way is making Loft. but involve more time.
Surface Deck.3dm (38.9 KB)
Use the good old NURBS surface modelling method - overbuilding and trimming. Think like a model maker. You bend a piece of balsa wood (the degree 2/5 plane with CVs moved vertically), mark your shape with thin model makerâs tape (the two lines and G2 continuous blend curve) and then cut it out on the band saw (trim).
Surface Deck.3dm (2.1 MB)
Itâs a bit like designing certain types of sheet metal cutlery : )
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Yes,
But the best option for me right now is Loft, because Iâve realized that there is still no direct function for doing this using the two curves without âpatchâ.
What is wrong with a trimmed NURBS surface? Easy to shape. Good curvature. Simple topology.
to be fair, a simple single span surface trimmed to shape as @lagom suggests is the âbest solutionâ in terms of topology and editing later.
No,
Because it has âhiddenâ control points, so the surface is hidden and not flat in cross section. Furthermore, when exporting to an IGES file, the surface is not trimmed.
that is entirely manageable. Trimmed surfaces are used everywhere for everything. Every production model ever made has trimmed surfaces in it, unless you were a 1990âs era patch modeler from ILMâŚ.
how are you exporting you iges files, and to what software?
Iges files will absolutely export trimmed.
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Please send to me the example Surface Deck 3dm with âyou Patchâ and his IGES format for evaluation.
Sorry, but thatâs plain nonsense. The surface is curved in one direction and has zero curvature in the other. Also, since decades, NURBS surfaces are exported without any ado via IGES to other software in any industry. Do you seriously believe Toyota, Airbus, Samsung, and all the tier-1 and tier-2 businesses in all industries are doing it wrong?
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you can replicate this for yourself, simply make any curved surface, trim it and export as iges, use the default settings, or pick one that matches the software you are transferring to.
if it fails, something is going very wrong on your end.
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Hello experts,
Please give my example file corrected by your and the corresponding IGES surface for see and less words.
Thanks very much in advance.
less talk.3dm (67.1 KB)
less talk.igs (18.7 KB)
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Thanks very much Kyle for your example. I imported you surface and is not trimmed.
My surface with loft is trimmed
Thanks again for try to help.
Regards,
Givanni
Of course Kyleâs IGS-file opens properly trimmed. I just opened it in Alias, and I also opened it in a bog standard online file viewer, see below.
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Why arenât you mentioning what you are trying to export TO? That would solve the problem. The way youâre going about this is deliberately obtuse, no one needs to be furnishing you with test files, this isnât rocket surgery.
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No worry. My Software is not Autodesk family. Anyway, Thanks