Op 25-3-2023 om 19:07 schreef Josh English:
> It looks good to me. I didn't get a satisfactory "kiss the edge of the 
> triangle" look but I didn't do a lot of heavy math. Even the sqrt(3)/6 
> was a guess that just seemed to work well enough.
> 
Yes, I also "guessed" the best fits to what I wanted to achieve ;-)

> I made a few more adjustments to the code
> 
> #declare TorusRadius = sqrt(3)/6;
> #declare Torus = torus {TorusRadius-Line, Line rotate x*90 translate 
> <0.5, TorusRadius, 0>}
> 
> And then I experimented with stretching some triangles, which would 
> happen in a mesh and got the expected distortions of the radius. I'm not 
> sure that's even possible to fix without customizing ellipses for each 
> triangle, so probably at that point a cylinder and not a torus creates a 
> better marker.

I did that too; gives insight at least about how it all works. I never 
paid much attention to uv_vectors, as most of the uv_mapping I am doing 
is through modellers and with image_maps. However, this is a good 
learning exercise.

-- 
Thomas

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