Any way to twist twice before extruding once?

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Any way to twist twice before extruding once?

DanS
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The linear extrude tool is great but I'm having trouble getting it to do one thing I want.

Let's say you have three circles and you wish to extrude them such that C twists around B and B twists around A.

I can't quite see how to do that because I believe I read you can only extrude something once (plus a second extrusion might "smear" an object even if it were possible).

Is there a way to do this?
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Re: Any way to twist twice before extruding once?

MichaelAtOz
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DanS wrote
The linear extrude tool is great but I'm having trouble getting it to do one thing I want.

Let's say you have three circles and you wish to extrude them such that C twists around B and B twists around A.

I can't quite see how to do that because I believe I read you can only extrude something once (plus a second extrusion might "smear" an object even if it were possible).

Is there a way to do this?
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Re: Any way to twist twice before extruding once?

Ronaldo
You could not do it with linear_extrude which just twists around the extrusion axis. If I understand well your problem, you need a helical extrusion. If I am right, you will need some sweep operator. See https://github.com/openscad/list-comprehension-demos

2016-08-05 19:58 GMT-03:00 MichaelAtOz <[hidden email]>:
DanS wrote
> The linear extrude tool is great but I'm having trouble getting it to do
> one thing I want.
>
> Let's say you have three circles and you wish to extrude them such that C
> twists around B and B twists around A.
>
> I can't quite see how to do that because I believe I read you can only
> extrude something once (plus a second extrusion might "smear" an object
> even if it were possible).
>
> Is there a way to do this?

Quoted as it didn't make it to the mailing list.





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