Generating relief on top of torus
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Hi Mick, hi folks.
I though about that helical path that goes around the torus and got these ideas:
1 - As it goes around, the path rotates two full turns around the torus.
2 - As it goes around, the path starts on the top, then goes inside and down and then outside and up. This is done twice. Each of these lateral movements, one from inside to outside and vice versa and the other one up and down, are like sinusoidal curves.
3 - Add to this the fact that, when using the Follow me tool, the path rotates about two axes at the same time, which produces a rotation around the third axis.
4 - I still need to figure out the orientation of the circular facet after it completes its two rotation to see by how much it actually rotates and what is the needed correction to have it register perfectly after two turns.
5 - I will also try the Follow me and keep plugin to see if I can have a solid group without any more interventions.
6 - I will try to set the small circular facet on the midpoint of a sement of the path instead of on an endpoint. This should works.
Just ideas.
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@sketchymick said:
I thought that by increasing the number of sides in the rib, say to 180 or some multiple of the rotations, it would fix this problem and the rib would become a solid, however this didn't seem to be the case. I'm intrigued now.
i am more_likely_than_not misinterpreting what you're saying here but if the 'rib' your referring to is the smaller 'rope' going twice around the torus -and- by 'solid' you mean a solid group (sketchup solid) then jean has already accomplished that..
it's the path line which remains in the middle of the rib which prevents it from registering as solid.. erase it and the rib will be solid.
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@unknownuser said:
@sketchymick said:
i am more_likely_than_not misinterpreting what you're saying here but if the 'rib' your referring to is the smaller 'rope' going twice around the torus -and- by 'solid' you mean a solid group (sketchup solid) then jean has already accomplished that..
No you're not misinterpreting it. I was just curious as to whether there was an elegant solution, rather than having to manually stitch up the ends (Johnny's method). Of course the pragmatic way is to spend 30 seconds to stitch it up like this, but the purest in me is searching for the combination of facets that would avoid needing to do this. It's pure curiosity.
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Here is a way:
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Hi Gilles, hi folks.
Very clever.
Best regards.
Brillant.
Salutations.
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You are right, I forgot one step.
Thanks to clarify.
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Hello Jeff, had a good night?
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Seems Follow me and rotate by Wikii make something similar ?
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@unknownuser said:
Seems Follow me and rotate by Wikii make something similar ?
[attachment=0:26zw3j75]<!-- ia0 -->far.jpg<!-- ia0 -->[/attachment:26zw3j75]
hmm.. maybe component stringer then curviloft can do the trick too?
(can't check right now because I'm on a bus but doesn't component stringer have a rotate option?)
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@unknownuser said:
but doesn't component stringer have a rotate option?
Component Stringer by Chris Fullmer
Yes it has, it's even its principal quality
It's only default is the no intuitive position of the Axis default
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surely Rhino Muhahahahah.
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I created this in what I assume is the normal fashion: started with a torus, drew a line that wrapped around the torus twice, removed one line segment, created a surface orthogonal to the line end, drew a circle, and used a follow-me to create the "pipe". I then attempted to stitch the ends of that pipe together with a series of manually drawn lines to create triangles. I gather that this attempt failed. The original instructions said to use Skin to stitch the pipe together, but I could not get that to work at all.
So, I cannot see how to fix this helix. And I gather that the original torus also has a defect, but I've not had a chance to tend to that.
Again, any hints would be appreciated.
Jon
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@jean lemire said:
Hi Jon, hi folks.
See this SU file for ideas.
Jean: this is what I attempted to do, but I was unable to close up the helix successfully.
Jon
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@gilles said:
surely Rhino Muhahahahah.
after Jon gets all his issues sorted out, maybe I'll put up a little vid showing a couple of ways
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@jon bondy said:
I created this in what I assume is the normal fashion: started with a torus, drew a line that wrapped around the torus twice, removed one line segment, created a surface orthogonal to the line end, drew a circle, and used a follow-me to create the "pipe". I then attempted to stitch the ends of that pipe together with a series of manually drawn lines to create triangles. I gather that this attempt failed. The original instructions said to use Skin to stitch the pipe together, but I could not get that to work at all.
So, I cannot see how to fix this helix. And I gather that the original torus also has a defect, but I've not had a chance to tend to that.
Again, any hints would be appreciated.
Jon
it's hard to say where you went wrong but the helix will close.. your latest uploaded drawing has multiple faces on top of each other.. if you're stitching by hand, it's best to go into it with a systematic approach then you just have to be a robot instead of creating a mess.. (but like i said, it's hard to see where you went wrong or why all those extra faces were in there..
personally, i think i've done more than enough hand stitching in the past so i opted for a plugin to close the gap
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i deleted all the stuff in that segment then selected both raw circles and used curviloft..
http://sketchucation.com/forums/viewtopic.php?t=28586i also deleted the center path line, grouped the helix and it's registering as a solid (no holes or extra faces etc..)
the torus (which is hidden in this model for anyone wondering where it is) looks good to me.. if you're concerned about it not registering as solid, it's because of the circle path line running though the middle of it.. delete that line (or remove it from within the component) and it too will be a solid..
.
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I tried Gilles approach, and when I got to step 11, the two parts did not line up. I modified the component by re-rotating the top until it looked OK, but I doubt that I got it spot on. The resulting torus looks nice, but is not solid at all. Boy, those explode and group steps take 10-15 minutes!
I was also not sure exactly how I was to do the smoothing in step 12.
Jeff: curviloft made quick work of joining the ends of the pipe together (thanks!), but the resulting group is still not noted as being solid (it just says "Group (1 in model)"). Ironically, I already had curviloft, but I have so many tools that I can't keep track of which to use when!
Thanks for all of the help!
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