[OpenSCAD] Feature discussion: warp object along a curve

Whosawhatsis whosawhatsis at gmail.com
Sat Feb 12 01:28:25 CET 2011


It should be fairly straightforward to work out the math for that, then you could generate a call to the polyhedron module with the proper points. If you could use loops to define the points in a polyhedron, you would be able to implement it entirely within OpenSCAD.
On Friday, February 11, 2011 at 4:20 PM, Len Trigg wrote: 
> A morphing extrusion between 2 2D shapes would be a fantastic
> addition! I wanted to do this just an hour ago - take a square and
> morph it into a circle in order to make an adaptor that would let me
> smoothly connect a tubular pipe to a box-section tube! (Did you come
> up with even an external way to do this?)
> 
> Cheers,
> Len.
> 
> On Sat, Feb 12, 2011 at 1:05 PM, Whosawhatsis <whosawhatsis at gmail.com> wrote:
> > I was trying to do something similar a while ago, but never found a way.
> > What I was trying required an arbitrary path and varying diameter. What I
> > suggested was a way to extrude from one 2D polygon, morphing into another.
> > With this, it should be fairly simple to set up a series of polygons to
> > follow a sine wave to achieve what you are suggesting. Unfortunately, I
> > think in both cases the best way is currently to generate the geometry with
> > an external script.
> > 
> > On Friday, February 11, 2011 at 3:57 PM, Tim Schmidt wrote:
> > 
> > I'm working on a project at the moment that requires bending a
> > cylinder to follow two different curves - a sin wave that wraps around
> > the surface of another cylinder. The only way I've been able to
> > implement such a thing is by tessellating many thin sections of a
> > cylinder, and the code is ugly.
> > 
> > It'd be a nice feature to have, but I don't have any idea what the
> > interface should look like - considering that arbitrary curves would
> > be nice to be able to represent. Perhaps we can pass a mathematical
> > function, and bounds within that function should be evaluated to
> > describe the curve?
> > 
> > --tim
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> > 
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