Polysurface.ByLoftGuides doesn't recognise guides


#1

Hi,

I seem to be having a modelling problem. I want to loft 2 or more NURBS curves along 4 guides. The guides are driving 4 corners of a nonregular quad in which the NURBS is inscribed by Control Points (the control points are driven by the sides of the quad). See layout sketch.

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When I loft the NURBS cruves along the 4 guides, I don’t get a yellow warning. It is however clear that Dynamo doesn’t uses the guides and just performs a regular loft between the profiles. See image. (guidecurves are displayed lightblue)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When I replace the NURBS profiles with the much simpeler quad profiles the Loft operation succeeds. See image.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Can anyone point me to a workflow where I would be able to loft the NURBS curves along the guides?

Thanks,

Paulus


#2

Hi Paulus,

I suspect that this is a bug. How about the following work-around?

2015-06-26_11-38-22

You might need to make sure that the guide curves are facing the same way. “Curve.Reverse” could help with that.


#3

Dimitar,

Thanks for your reply.

I posted a new post explaining this bug and an example file over here: http://dynamobim.com/forums/topic/polysurface-byloftguides-bug/

I need to have more control points (not only on the guides) to control the shape of each profile. The control points on the guides are connected with a straight line. 3 More control points are then added along this line. Those 3 control points aren’t on a guide.

Paulus