3D Modeling Curves

[mikeakar]

I am modeling curved surfaces. I assumed the polyline is a closed polygon and for the solid to be capped after extrusion. However, this is not the case. I tried "create planar caps," which did not work. I have also tried converting the polyline to a polygon, but yielded the same results.

 

Is there a way of doing this simply? See attachments. Thank you in advance.

 

[zoomer]

I think you need to check your "closed" 2D geometry for any errors before extrusion - mainly for overlapping.

Edited January 27 by zoomer

[VIRTUALENVIRONS]

Yes, extrude that surface just "0".  Then extract a surface and shell.

[Kevin Allen]

does the polygon have a solid fill?

[rDesign]

4 minutes ago, zoomer said:

I think you need to check your "closed" 2D geometry for any errors before extrusion - mainly for overlapping.

And with the polyline selected make sure on the OIP Shape tab that it says that it is Closed.

 

Vw2025 Help File — Closing and Opening Polygons and Polylines

Edited January 27 by rDesign

[mikeakar]

2 hours ago, rDesign said:

OIP Shape tab that it says that it is Closed.

Thank you all! Yes, I didn't know of this option. It was unchecked. I thought "composing" a polyline would automatically make this selection.

[rDesign]

15 minutes ago, mikeakar said:

I thought "composing" a polyline would automatically make this selection.

If all of the points of your Polyline match up exactly then yes, Composing them would also automatically ‘close’ it. But you probably had a slight gap between two or more of the points, which is why you needed to do the extra step to close it.

[Pat Stanford]

1 hour ago, rDesign said:

But you probably had a slight gap between two or more of the points, which is why you needed to do the extra step to close it.

In which case you might want o edit the composed/closed poly and inspect to find where you just created an extra segment, delete that extra point and then move one of the other points so it snaps coincident. That way you don't have an extra small edge that has to be processed when you perform other operations.

 

Or uncheck the closed button so you will actually see the gap between segments. But you may need to zoom WAY in to see the gap. Snap Loupe can be useful for this. But at least you know the missing segment should be between the first and last vertices.