Drawing vector rope in Inkscape

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ryanlerch
Posts: 107
Joined: Thu Jun 07, 2007 8:36 am
Location: Brisbane, Australia
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Drawing vector rope in Inkscape

Postby ryanlerch » Thu Nov 06, 2014 5:45 am

Here is a tutorial i did up on using the inkscape Live Path Effects to create rope in any shape using inkscape:
http://inkscapetutorials.org/2014/10/20/use-inkscape-to-draw-vector-rope-in-any-shape/
here is an example:
Image

Also, I made a few vector assets using this tutorial, and they are available for all to download and use (Public Domain / CC0 license):
http://vectors.ryanlerch.org/rope-ring/
http://vectors.ryanlerch.org/rope-ring-with-knot/
http://vectors.ryanlerch.org/rope-border/

:D

Lazur
Posts: 4717
Joined: Tue Jun 14, 2016 10:38 am

Re: Drawing vector rope in Inkscape

Postby Lazur » Thu Nov 06, 2014 8:34 am

Nice.

I would add that it shouldn't be much of a try and error for the pattern, but plain geometry.

Image

Figure 3. An ideal representation of a two-, three- and four-stranded rope laid with a pitch angle corresponding to the maximally rotated zero-twist structures with the respective pitch angles of 39.4°, 42.8° and 43.8° relative to the equatorial plane. With these pitch angles, the strands will neither rotate in one or the other direction under vertical strain.

Table 1. Pitch angle, vZT, for the zero-twist structures given as a function of the number of strands. For the zero-twist structure there is no coupling from strain to rotation. Further, to these helical structures one cannot add additional rotations.
No. of strands 1 2 3 4 ∞
vZT _ 39.4° 42.8° 43.8° 45°


http://iopscience.iop.org/0295-5075/93/6/60004/fulltext/

http://iopscience.iop.org/0295-5075/93/6/60004/pdf/0295-5075_93_6_60004.pdf


So for a two stranded rope you would only need to draw a helix with a 39,4° pitch angle.
To make a good representation of that, the function plotter extension would come handy, plotting a sin wave. Only needs some scaling since without it would show a 45° pitch angle (scale down the height with 82,141% ?). Adding the right stroke width is the only hard part.

zerocinquanta
Posts: 40
Joined: Wed Sep 24, 2014 4:10 am

Re: Drawing vector rope in Inkscape

Postby zerocinquanta » Sat Nov 29, 2014 12:05 am

A version of mine, half way between trimming the pattern after being put along the path and the geometrically impressive proposal by Lazur :D
http://youtu.be/C9OfV6xMPE0


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