How to make a net?
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Hello All:
I'm trying to make a net or otherwise dome-like tubular structure. Any way to drape a grid of lines on a curved surface and then convert the lines to tubes? (the easy way
Here's a half-hearted attempt.Thanks.
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Line to tube by Didier Bur
and all Extrude edges and aespecially Extrude edges by rail by face by Tig
But don't wait miracles for the intersections for close up! ; )
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- one of the sphere or other similar draw shape plugins
- distort it to your liking; subtract the bottom half perhaps.
- as the maestro says, use line to tube to make the structure 3d or maybe pipe along path or maybe some other.
It is required that you post your results here. (See clause 4995.b.645.jd, subsection 2 of your user agreement.)
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@brookefox said:
- one of the sphere or other similar draw shape plugins
- distort it to your liking; subtract the bottom half perhaps.
- as the maestro says, use line to tube to make the structure 3d or maybe pipe along path or maybe some other.
It is required that you post your results here. (See clause 4995.b.645.jd, subsection 2 of your user agreement.)
My apologies. Extruding lines to tube or pipe is not the difficulty. Nor is creating a curved or spherical shape. Draping, or otherwise bending a symmetrical grid pattern onto a curved surface is the devil here. To draw each line individually and space it equally is what I find daunting, and I was just wondering if anyone knew of a more expedient way.
Thanks.
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@pbacot said:
You have to decide what sort of framework you want and what is mean by equally spaced. Is something like this what you want in terms of lines? (given you can produce the tubes as you said, I haven't bothered). this is derived from a follow-me lathed dome. Copy and paste the lines under the wireframe setting.
Many thanks! Yes, this is getting closer. Copy and paste the lines from wireframe view. Brilliant! Why didn't I think of that?
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I hang around here a lot (by my posts 1000 times more than you
) that's probably why.Here I have done some manual (follow me) tubes on the structure just to see. the rings and the rib are each solid groups. the whole mesh beyond is one solid group. Obviously you can radial duplicate that rib add rings etc.
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You have to decide what sort of framework you want and what is meant by equally spaced. Is something like this what you want in terms of lines? (given you can produce the tubes as you said, I haven't bothered). this is derived from a follow-me lathed dome. Copy and paste the lines under the wireframe setting.
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Unlike Pilou, I am not above crying "Foul!"
(As foul as that may be.)
(Even chopped liver has rights.)
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Time out
Foul? Fowl? -
Yes!
Play on!
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Well yes.
Brookefox's original recommendation should get you there.The selection using wireframe is a nice gimmick. But just using Didier's excellent "line to tube" ruby, you don't have to do that. You do have to unsoften the lines within the hemisphere. The ruby helpfully groups the result separate from the lines.
The issue is determining what sort of sphere framework you are looking for. You could also use a geodesic dome. But here is a result with my frame using the "line to tube" ruby. Much better than "manually" constructing it.What did you come up with PetroPix?
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@pbacot said:
Well yes.
Brookefox's original recommendation should get you there.The selection using wireframe is a nice gimmick. But just using Didier's excellent "line to tube" ruby, you don't have to do that. You do have to unsoften the lines within the hemisphere. The ruby helpfully groups the result separate from the lines.
The issue is determining what sort of sphere framework you are looking for. You could also use a geodesic dome. But here is a result with my frame using the "line to tube" ruby. Much better than "manually" constructing it.What did you come up with PetroPix?
Okay you two love birds-- settle down! I can't wait for when I ask, 'How to Make a Nest?'
Anyway, I'm working on it, working, working-- and I suppose I'm now on the hook for posting a tutorial here. Fair enough, I love this forum-- now where WAS I?
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I failed to mention the wireframe, edges only selection as I thought it was clear. Seems it was not, but as you say 'line to tube' doesn't require that.
Here's one with the non-radially faced sphere (dome), in which the faces are more approximately equal on the surface. If it is desired that the grid be regular before draping then take the faces only and drape the even grid from '(sandbox) from scratch' or other and drape as Pilou showed. Once draped of course the grid is distorted (except in ortho plan view).
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@unknownuser said:
now where WAS I?
You were going to show us approximately what kind of thingy you were looking to model.
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Ah yes, I have built structures like that with those plugins, too...
[xxl-img:16r7n4hu]https://lh4.googleusercontent.com/-Vxt3eLcDCdA/SxpNB9vm88I/AAAAAAAAC2k/1nHsbF5c5wU/s800/gradem%25C3%25A5l.jpg[/xxl-img:16r7n4hu]
[xxl-img:16r7n4hu]https://lh5.googleusercontent.com/-4kst3gHb36M/SxpaUnwolNI/AAAAAAAAC3g/exM1-TYvIFw/s1024/grademal.jpg[/xxl-img:16r7n4hu]
[xxl-img:16r7n4hu]https://lh4.googleusercontent.com/-tLQYrxWR3xE/SxpaQYN4YhI/AAAAAAAAC3c/QuXctyi_tG8/s1024/example2.jpg[/xxl-img:16r7n4hu]
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@brookefox said:
@unknownuser said:
now where WAS I?
You were going to show us approximately what kind of thingy you were looking to model.
Well, actually -- it's a bungie cord net, about a foot square -- for strapping down cargo on, say, the back of a motorcycle seat. So there's quite a bit of deformity on the original form involved: bulge and elasticity. Challenging to draw with any degree of realism, however, that's not my purpose at this juncture. The net is a subordinate feature on a much more elaborate model. The techniques discussed here are enough for me to "fake" it for the interim. The model's over-all purpose is to show functionality of its various components, and how they relate to each other; it's not to win an illustration prize.
Many thanks!
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@brookefox said:
I failed to mention the wireframe, edges only selection as I thought it was clear. Seems it was not, but as you say 'line to tube' doesn't require that.
Here's one with the non-radially faced sphere (dome), in which the faces are more approximately equal on the surface. If it is desired that the grid be regular before draping then take the faces only and drape the even grid from '(sandbox) from scratch' or other and drape as Pilou showed. Once draped of course the grid is distorted (except in ortho plan view).
can you please explain how you made those constructions beam ? step by step ...
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