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Sweep nurbs just do not work the way it should

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Cobus Prinsloo
Sweep nurbs just do not work the way it should
on Jul 10, 2016 at 5:23:19 pm

I'm getting extremely frustrated. I don't get my profiles to sweep the right axis along a sweep path. I'm changing the angles of the profile but nothing changes. Is there a way to post screen shots to explain visually?

Please help. This is for a big project for which I modelled a new Jag Pace car, and now this stupid little issue keeps me from completing it!


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Brian Jones
Re: Sweep nurbs just do not work the way it should
on Jul 10, 2016 at 7:51:06 pm

you can use a Rail Spline in most cases to control which way the swept shape orients on the main spline


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Adam Trachtenberg
Re: Sweep nurbs just do not work the way it should
on Jul 10, 2016 at 10:00:51 pm

This is a tough case because the spline turns in every direction. The rail spline works by giving the sweep a hint, but here, no matter how you offset it, it's giving part of the sweep the wrong hint. I think the only solution is to use multiple sweeps.


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Cobus Prinsloo
Re: Sweep nurbs just do not work the way it should
on Jul 12, 2016 at 2:41:42 pm

Hi and thanks for your response. This was a simple profile that was supposed to sweep along a 90 degree arc - very simple stuff! After messing around, I figured out that one has to actually rotate the profile's axis - not the profile itself! Don't know why it's being made so complicated

best regards


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Brian Jones
Re: Sweep nurbs just do not work the way it should
on Jul 12, 2016 at 6:21:30 pm

the Z-axis of the swept spline is used for orientation


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Cobus Prinsloo
Re: Sweep nurbs just do not work the way it should
on Jul 13, 2016 at 11:39:27 am

tHANK YOU - WILL KEEP TRHAT IN MIND!


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Adam Trachtenberg
Re: Sweep nurbs just do not work the way it should
on Jul 13, 2016 at 1:15:53 pm

Sorry, Cobus, I was thinking about a file someone else posted recently.


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