This is doing something.

Trying separate the growth axis. The reaction diffusion pushes in the normal direction and I increase edge length in the transverse direction.

I'm weighting the growth using the principle directions of curvature that I get from local quadric fitting. It works OK.

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I've always been curious about the growth model @nervous_jesse developed so I thought I'd explore it a bit. Here is the model but with expansion governed by grey-scott reaction diffusion.

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Just trying some different geometry.

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And here's one with the wonky angle constraints.

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This is the animation using the Darboux Cyclide signed distance field as a force in the elastic solver. It looks different than just a straight quadric. better?

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I was unsatisfied with how handles were resolving, and I found a solution using quadrics... but then I happened upon another implicit form which is even better,The Darboux Cyclide. The Darboux Cyclide is like a super torus...

I have quite a bit more to learn, but it turns out least squared fitting of the Cyclide worked very similarly to fitting a quadric!

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Getting curves to coil into helices is marginally difficult. Projecting the curve locally into a cylinder and tweaking the axis/radius a little gets some nice coiling/buckling. It all descends into scribbles anyway.

Thanks David Ebberly!!!

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When simulations fail, they usually fail spectacularly... maybe its a metaphor...

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OK, here's the whole thing together. Going to stitch 6 of these together for a submission to little group show. Not sure how to display the sequence, probably just s monitor or something. I have notes, but I think it will look out pretty nice, looping the day away.

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::arnold voice::
Its not a tumah

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