07:23 <guso78k> InPhase, you mean to tilt (towards positive z)  the 2D shape during  the rotate_extrude(not only rotate around z axis)

11:52 <InPhase> guso78: Well there are really two needs, one which has an XY polygon oriented XZ and rotate extruded while rising in z, and the other application having the polygon oriented along the helical path direction.

11:53 <InPhase> The first of these is simpler, and really should exist as an extension to rotate_extrude. The second might not even be sufficient like that, and could be better as a more general path sweep type primitive taking some function literals as inputs.

11:55 <InPhase> The first of these would really open up the trivial creation of pretty good quality threads with primitives.

12:00 <InPhase> There are some handy mechanically useful features in my thread library that would not be encompassed by this, like tapering ends, but that's not really too important for all applications. And that would be something made possible by the second approach, which is basically what my library does manually the hard way with polyhedron.

12:44 <guso78k> isn't the angle in  helical path as simple as a tilt with an angle of atan(h/(PI*D)), where h is the height increase in one revolution  and D is the diameter ?

14:36 <InPhase> guso78: Yeah, that's the formula for the simple helix. You have to think a bit more on a varying path, although I have an example of that one worked out in one of the closepoints demos, and another recursive-translation approach on the calendar with the happy grass.

17:25 <Guest95> hi

17:25 <Guest95> is anybody online

17:26 <Guest95> i have some quarries.

17:26 <ndnihil> that rocks

17:27 <ndnihil> just don't take them for granite

17:31 <teepee> haha

17:35 <InPhase> Now I want to make an OpenSCAD Rocks library dedicated to modeling solid rocks.

17:35 <ndnihil> you may as well, I made one dedicated to making plastic penises

17:45 <ndnihil> https://youtu.be/Ixh3ksPbZD4

17:45 <othx> ndnihil linked to YouTube video "Linear Actuator in OpenSCAD" => 1 IRC mentions

19:15 <peeps[work]> ndnihil: nice model. i was just watching that latest vid about the jugglebot actuators

20:08 <ndnihil> danke

20:09 <ndnihil> I think he overcomplicated them a bit