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Need help modeling a climbing rope


juangoretex

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9 minutes ago, fencer said:

Definitely there're many ways, more or less procedural or mathematically correct.
I tried first a more simple and flexible way.

climbing_rope_v01.hipnc 185.61 kB · 0 downloads

climbing_rope_01.png.1269121000a91f3db1611cb29b7dffcb.png

climbing_rope_02.png.e6e595fd6bb70cd23b45c1da49ca0752.png

climbing_rope_03.png.752bd0dbdee1bb4749b929d3c9483863.png

Damn that's beautiful, thank you so much Paul. Was still working on a few other methods but wasn't really able to figure it out still. Definitely going to study this setup :) Thanks again for taking the time

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On 4/23/2026 at 8:30 PM, fencer said:

Definitely there're many ways, more or less procedural or mathematically correct.
I tried first a more simple and flexible way.

climbing_rope_v01.hipnc 185.61 kB · 5 downloads

climbing_rope_01.png.1269121000a91f3db1611cb29b7dffcb.png

climbing_rope_02.png.e6e595fd6bb70cd23b45c1da49ca0752.png

climbing_rope_03.png.752bd0dbdee1bb4749b929d3c9483863.png

Hey man! Trying to wrap my head around this, got a question for when you've got time.

Why exactly do you go through all of that stuff before sweeping? Like measuring the distance between each point, calculating the cross product of the tangent and N, then reference that distance on the length of a line and use that as the cross section of a sweep node. To me it seems like just sweeping the lines and using the normals to orient them seem to do the same thing?

I'm sure I'm missing something here but just trying to learn and understand your thinking :)

2026-04-25 17_35_25-S__Dropbox_3D_Journey_Houdini_R&D_Multiple Methods_rope_tear_rope_tear.hiplc - H.jpg

2026-04-25 17_43_23-S__Dropbox_3D_Journey_Houdini_R&D_Multiple Methods_rope_tear_rope_tear.hiplc - H.jpg

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Sure, just sweep might be even better, then reference distance to ribbon width. But again, distance depends on angle and amount of twists, I would like not to overcomplicate this and just adjust based on look. 

More fun is to make a next step in the pattern, as your reference has a bit more complex stitch with 2 shifts, not simple cross as I did.

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13 hours ago, fencer said:

Sure, just sweep might be even better, then reference distance to ribbon width. But again, distance depends on angle and amount of twists, I would like not to overcomplicate this and just adjust based on look. 

More fun is to make a next step in the pattern, as your reference has a bit more complex stitch with 2 shifts, not simple cross as I did.

Right, got it. Yep that's right! The reference goes twice over and under, I'll see if I can figure it out :) Thanks man

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