Double Spiral sculpture "Wonder" (up and down)

This is a cool double spiral sculpture by U.K. “Designer & Inventor” Tom Lawton. It’s on a rotating base so appears to go up and down at the same time. Done using parametric CAD.


Needs refinement but not too bad…

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There was a discussion on double spiral some time ago. But didn’t know it will give a nice effect when turning.

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where were you was Laurent! :smiling_face_with_three_hearts: :blush:

Thanks, looks interesting and relevant but unless I get stuck, I don’t want to ruin the fun of discovery by looking at other code. :sweat_smile: I’ve made good progress and am pleased with how it looks. I have separate parameters for inner and outer radius (5 and 8), inner and outer “turns” (3 and 1 in this animation), ‘DivPts’ on the base circle (43) and height (15).

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Top view:
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I suppose I should post the code but don’t want to spoil anyone else’s fun. :sunglasses:

Turns in this one are 2 (inner) and 1 (outer) with layers reversed in GIMP:

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Nice work Joseph. And thanks for making me aware of this sculpture

I replaced the Pipe with an elliptical cross section that twists based on distance from centerline. Not bad but doesn’t match some artistic details of Tom Lawton’s sculpture.

wonder_2023Aug27b (37.8 KB)

In a different version, I’m exploring the Z coordinate of each perp frame (cross section), so it is flatter at top and bottom and steeply banked at the vertical middle. I’d rather avoid the complexity encountered in a recent thread, banking a figue-8 ramp.

in his sculpture, appears he has a total of 1.5 periods, or 1.5 revolutions’, of each spiral

Tricky, isn’t it? I’m not so sure. This is version ‘Aug27b’ with ‘Turns1’ and ‘Turns2’ set to 1:

This is a hasty hack that implements half turns, version ‘Aug27d’ with 1.5 turns for both spirals: (44.1 KB)