Error message attempting to create solid from loft

Rhino
,
1

I’m experimenting on a trial license, attempting to create a solid from a loft of an oloid shape. When I attempt to create the solid, I get an error message saying “unable to create solid”. Is there any way to get more info on the reason for the error message such that I can determine why?

2

Difficult to know without the file… If you are using the CreateSolid command, the most likely problem is that Rhino couldn’t find a way to make a complete, closed shell out of the parts. This could indicate incomplete intersections between the pieces, holes, bad surfaces etc… Much more info than that is not possible without seeing the actual geometry involved.

3

Thanks for the response. I recreated the loft of a quarter of the surface, copied and joined the surfaces, and retried recreating a solid. Now I don’t see an error message, but I don’t think it’s actually creating the solid. I’m attempting to attach the file.

oloid rhino 1.3dm (125.6 KB)

4

If you run the command ShowEdges>Naked edges you will see this:

image
image1359×913 247 KB

Having naked edges means it’s not closed (solid). However those naked edges are close enough to be joined. If you Explode the object, run RebuildEdges and then Join, it makes a closed solid. I don’t know why those naked edges are there in your model, I guess it would be good to have the procedure you used to get to the model you posted.

5

Thanks again! Most helpful. I’m fairly sure the open areas are the result of not getting quite the exact points to do my mirror copy and roItation of a copy to create the final shape. It’s very helpful to have a command that shows the problem areas. Finding the exact correct points is what I’[m finding to be difficult. I’ll work on a bit more and see if I can get a fully closed surface.

6

I’m not making much progress. Even when I try lofting all four sections from a single wireframe I’m getting naked edges. Not sure what I’m doing wrong.

Oloid wireframe Rhino.3dm (50.4 KB)

7
8

Dale, what function are you using to create the surfaces? As far as I know, DevLoft is the only command in Rino that will give a developable surface to the wireframe of an oloid shape. I don’t think other methods create a developable surface and will thus deform when flattened which may be the reason you are seeing an area discrepancy.