| Author |
Message |
    
Dan
Senior Member
Username: Designd
Post Number: 216
Registered: 05-2001
| | Posted on Thursday, May 01, 2008 - 07:15 am: | 
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See the attached file.
4 simple splines that I try to generate a boundary NURBS object from.
The object has more control lines then it should.
Since I use the "from source" option in the degree tool options I expect the surface to have the same number of control lines as control points in the splines.
It's ok in depth but not in length.
Also if you duplicate the left spline in x direction and try to construct a simple loose lofting NURBS from the vertical splines you'll get strange results.
Dan |
support@formZ.com
Moderator
Username: Tech
Post Number: 5056
Registered: 04-2001
| | Posted on Thursday, May 01, 2008 - 12:09 pm: |
|
Dan,
The problem is being caused by the right hand vertical segment. If you activate the controls on this object and look at the second control point from the bottom, you can see it forms a 'kink'. The extra control points are being inserted by formZ in order to closely conform the surface to this 'kink'. We'd be curious to know how you created a control point like this. If you rebuild the surface to eliminate this kink then the boundary nurbz tool will behave as expected.
ZWebTech Support |
Dan
Senior Member
Username: Designd
Post Number: 217
Registered: 05-2001
| | Posted on Thursday, May 01, 2008 - 01:31 pm: |
|
Very strange. The right hand segment is a duplicate of the Left hand segment.
Obviously this happened when I twigged the control points of that segment.
Dan |
Dan
Senior Member
Username: Designd
Post Number: 218
Registered: 05-2001
| | Posted on Thursday, May 01, 2008 - 01:40 pm: |
|
I reconstructed the vertical splines from 5 points to 6 points (don't keep shape) and yet the NURBZ created from that SPLINE has 8 control lines in length.
Dan |
Dan
Senior Member
Username: Designd
Post Number: 219
Registered: 05-2001
| | Posted on Thursday, May 01, 2008 - 02:23 pm: |
|
I found a workaround for the problem.
I used the extract tool to extract a polyline from the Spline and then used the Spline tool to recreate the Spline.
Now it works properly.
Dan |
Jean-Luc DAUREIL
Senior Member
Username: Jean_luc
Post Number: 427
Registered: 07-2001
| | Posted on Thursday, May 01, 2008 - 03:00 pm: |
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Dan,
Just curious,
why do you not use the nurbz by boundaries with length and depth degrees set to 2 (from source unchecked)?
May I missed something here...
jL |
Dan
Senior Member
Username: Designd
Post Number: 220
Registered: 05-2001
| | Posted on Friday, May 02, 2008 - 12:34 am: |
|
hi Jean-Luc
I tried this t, it doesn't matter, I get the same results.
Dan |
boundary