Grasshopper

algorithmic modeling for Rhino

hi, everyone

I have a question about a revolution surface generated from a curve, a rail and a axis. The component works fine, but I want to delete the curve that appears in the surface, because when I trim the surface, that curve works as a split curve

Here the images

The surface

The surface split

Thanks

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Replies to This Discussion

Hi josé,

this is not possible. Nurbs surface have to have Curves representing the surface. They also called Brep which means boundary representation. So the curve in your case is caused by the rotation and it's normally the start and the end of the revolving.

Also when lofting it does the same...there the start/end point of a closed curves determine where this ghost ;-) curve will appear. So there is no way to get rid of this curve I'm sorry.

But there might be a workaround for what you are need to do, so please explain a bit more or even better place an example file.

Cheers FF

As I reply to the next comment, I tried to convert the brep into a mesh, but if I do this I will lost the total control of the surface and I need it for fix it into the main structure. I was thinking about selecting the bad panels and change it for a panels that are fine (I can try to do this if i select the list items and rotate it with an angle) 

Thanks!

If this is just for appearance then feed the brep into a mesh component and turn off the brep preview.  In my example the seam line would be above the x-axis line that you see down on the x-y plane.

It isn't just for appearance, this division is for a series of panels that compose a facade, so I can't turn this brep into a mesh because I need to control all the corners of the panels to fix it to the main structure

In any case thanks ;)

This could help.

It may look complicated, it just identifies the subsurfaces "cut" by seam curves and rejoin them.

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