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Thru Curve Mesh - continuity

Valued Contributor
Valued Contributor
Could you make some comments on the failure of Method 1-A? Thanks!
 
Image.pngMethod 1-A. Half arcs as PrimaryImage.pngMethod 1-B. Half arcs as Cross
6 REPLIES

Re: Thru Curve Mesh - continuity

Siemens Phenom Siemens Phenom
Siemens Phenom

The spline for the second primary curve is not good.

If you create a section curve on the extrude at the start of the spline and measure the angle it is not 180 degrees.

Also if you look at the poles of the spline the second pole is very close to the start of the curve and the first pole is not exactly on the start of the extrude edge.

Steve V

Re: Thru Curve Mesh - continuity

Valued Contributor
Valued Contributor

Hi @StevenVickers  Thanks!

 

Yes. Those imported objects have some problems. However, what confused me is that to simply exchange the primary curves and the cross curves would make the surface able to be created successfully.

Re: Thru Curve Mesh - continuity

Phenom
Phenom
This is just my personal preference, but it's typically not wise to try and build quality surfaces from imported objects - too many things can go wrong with splines when they are translated to neutral formats, particularly DXF.

BTW, it did create the surface successfully - one just has warnings, which doesn't mean it was unsuccessful it just means that you may need to do some further analysis to make sure the result is what you're expecting. The text "...MAY not pass through..." is a bit ambiguous IMO...the message should be more indicative of what actually is happening.
-Tim

Re: Thru Curve Mesh - continuity

Valued Contributor
Valued Contributor

Hi @TimF

 

Yes. It's better to remodel those imported objects, although it might be a painful process. Thanks!

Re: Thru Curve Mesh - continuity

Phenom
Phenom
There are plenty of Edit Curve commands available to make this process less painful, plus the more you do it, the better you will become at doing it. If you're going to become a good NX user, then you're going to have to get used to doing tasks that are very labor intensive, particularly if you're going to expect to become a good surface designer/freeform modeler and figure out how to accomplish the tasks with which you're requesting assistance. Some of these aren't easy by any means, no matter what software you're using. Comes with the territory once you get beyond Extrudes, Revolves, Blends, etc.
-Tim

Re: Thru Curve Mesh - continuity

Valued Contributor
Valued Contributor

Hi @TimF  Thanks a lot for the tremendously helpful comments!