Hello,
I need to create a patch from a 3d polyline maintaining the edges but the option “maintain edges” need a starting surface…why I can’t create the patch surface simply by maintaining the input polylines edges?
Thanks,
Roy
sometimes it might be tricky when the curves/lines shear out in all directions, what might help is using a higher resolution for your points.
if you post a file people can have a look in specific.
Hi, encephalon,
thank you for your message.
The question is very simple…I would like the patch for a closed 3d polyline to strictly maintain the edges…but it seems it’s possible only to approximate it.
Hi Roy - that is generally correct - if the polyline is not planar then there is no way to match it exactly with a single surface. Feel free to post an example.
-Pascal
Hi Pascal,
here is the example. 3D polyline with Patch command applied. The Edges are approximated and not precise.
Yep, that is expected - the surface cannot have perfectly straight bits.
-Pascal
why I can’t use the option “preserve edges” without selecting another surface?
Hello- please see Help (f1 key) on this tool.
-Pascal
depending on your tolerance you can make it fit. i just approximated your shape, so it might be slightly different in your model.
make 2 curves sticking out like so
sweep with options untrimmed miters
patch with the following settings (again yours might be slightly different)
join and use the command ShowEdges, if there are no edges showing inside you have successfully created a watertight patch
but the edges are no more the originals… 