uf created spline display problem in nx gateway UI

[lugan2]

Hi all
I created a three degree spline through points through ugopen: UF_CURVE_create_spline_thru_pts(). The strange thing is when the result being displayed in the NX Gateway, it is showed as a awkward line segment joints (see Fig.1-splinewrong)? And when I click the fit button on the tool bar, the spline will be restored to be smooth(see fig 2-splinesmooth). Anyone know the reason??

 

[JohnRBaker]

It's strictly a 'display' issue. Until you perform a 'Fit' operation the system has not had an opportunity to determine the correct 'tolerance' needed to properly display the contents of the 'model'.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[lugan2]

Oh, ok, that makes sense! Thanks!

 

[JohnRBaker]

This is common when creating geometry using API tools since they are designed to do ONLY one thing, creating the geometry. To make these functions as efficient as possible they are limited to ONLY the task at hand since we have no idea how or what they're going to be used for, therefore control of the final display is deferred until either later in the program when the proper display updates are initiated programmatically or, as in your case, the program exited before any such update was executed and so you had to do it manually. Note that when creating this same sort of object using the normal interactive tools, the function includes setting the proper display since that's all the function is going to do, create the object and then cause it to be displayed so there's no question as to what the user is expecting to see when the function finishes, which is NOT the case when it was but a single step in what might have been a very complex program with many tasks being performed before it finished, at which point, if it were included, a single display update would have been more than adequate.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.