Re: [Inkscape-devel] Embroidery extension

17 Dec 2017

      That's really impressive.
I wonder if an extension is capable of setting the keyboard shortcuts ?
If it was then you could add an embroidery extension  to set and unset 
the shortcuts you use.
That would help to enable the workflows simple for complex domain 
specific extensions like this.
Question: - if the ice is white - how do you specify a thread change ?
On 12/18/2017 9:24 AM, Lex Neva wrote:
...
It took me awhile, but here's something better than photos, a
screencast showing how to use it:
https://www.youtube.com/watch?v=qXntE1X1RIw
On Tue, 2017-09-26 at 08:19 +0100, C R wrote:
...
+1 Thanks for helping make Inkscape more useful to a broader
audience! If you'd favour us with some photos of the extension
working, the Vectors team can prepare a press release to celebrate
the new extension on our social networks.
I think it's a cool enough feature to make some noise about. :)
On 25 Sep 2017 4:17 p.m., "Martin Owens" <doctormo@...400...> wrote:
...
I'm excited to see this breakthrough hit the website extensions
library.
But when it's done in due time :D
Martin,
On Mon, 2017-09-25 at 08:59 -0600, Ryan Gorley wrote:
...
Sounds incredible. Well done!
Ryan Gorley
Managing Partner | Dijt
On Fri, Sep 22, 2017 at 4:58 PM, Lex Neva <inkscape@...3585...>
wrote:
...
...
SOLVED!
This is a pretty huge breakthrough for me.  I've been puzzling
away
...
...
at this problem for over a year now.  I'm excited to say that
I've
...
...
solved it.  More details below for those curious.
My solution can fill a complex region with arbitrary holes
quite
...
...
quickly (sub-second in my tests).  It travels around the
borders of
...
...
the fill region (either the outer border or the borders of the
holes).  Any given section of the border is stitched over a
maximum
...
...
of twice.  No jump stitches are required.
I owe it all to this paper, "Approximation algorithms for lawn
mowing and milling":
http://www.sciencedirect.com/science/article/pii/S0925772100000
158
...
...
I'd previously reviewed the paper for ideas but I hadn't fully
grasped the one key aspect to their milling algorithm.  They
build
...
...
a graph of all of the rows and outlines -- that much makes
sense.
...
...
The ridiculously clever part is duplicating some of the edges
in
...
...
order to make a graph that must have an Eulerian Path in it.
Then
...
...
you just find such a path using a well-known algorithm, and
you've
...
...
created your milling path (or stitching, in my case).
It still required the addition of several heuristics to make
the
...
...
stitching come out nicely and the pathfinding complete
quickly.
...
...
Any old eulerian path solution would technically work, but it's
going to be weird if you stitch a row here, another one way
down
...
...
there, etc.
Anyway, bottom line is, "a solution exists".  I'm still in the
process of converting from the graph-theoretical solution to
the
...
...
actual stitching, but at this point the algorithm is sound and
the
...
...
rest is busywork.
Thanks everyone for the tips and for being a sounding board!
--Lex
On 8/28/2017 3:01 PM, Lex wrote:
...
Ah, I see.  My machine (a Brother SE400) can't cut the thread
and
...
...
...
continue stitching.  It's a pretty difficult limitation to
work
...
...
...
with.  I try to avoid jumps whenever possible, and when I
have
...
...
...
to, I place jumps such that they're easy to trim by hand.
On August 28, 2017 1:45:33 PM Michael Soegtrop <MSoegtrop@...3631...
hael
...
...
...
-Soegtrop.de> wrote:
> Dear Lex,
>
> yes, in case there is a large distance, the TSP solver
makes a
...
...
...
> jump. My
> machine can actually do jumps (knot the threads and cut
them at
...
...
...
> both
> ends), so my main goal is to optimize the number of jumps.
>
> What one should do is try to order the groups such that
> connections can
> be hidden below other stitching, but this is complicated,
> especially
> when you don't have the concept of an area (my stuff just
works
...
...
...
> on open
> paths).
>
> Best regards,
>
> Michael
>
> On 25.08.2017 21:05, Lex Neva wrote:
>> Hi!  Sorry for going dark there -- everyday life intrudes
>> fairly often.
>>
>> Neato, and thanks for the explanation!  It does indeed
look
...
...
...
>> like your
>> stuff follows a similar method to inkscape-embroidery.  A
few
...
...
...
>> minor
>> differences:
>>
>> * The extension handles creating a "grating" of lines
>> automatically and
>> intersects them with the fill region using Shapely (a
Python
...
...
...
>> extension).
>>
>> * The fill pattern is handled automatically through the
>> insertion of
>> extra nodes as you mentioned.  Currently there's only one
>> pattern: a
>> sort of stair-step/staggered pattern that is visually
>> pleasing.  I
>> cribbed it off of a pattern I bought online that was made
>> using a
>> commercial embroidery design program.  I'd love to
understand
...
...
...
>> how to
>> code more complex patterns, but I haven't given much
thought
...
...
...
>> to it yet.
>>
>> * The extension used to have a TSP solver of its own, but
it
...
...
...
>> really
>> didn't do a particularly good job.  I started off trying
to
...
...
...
>> fix bugs and
>> ultimately just ripped it out.  Instead, I carefully
order
...
...
...
>> paths in
>> Inkscape.  The new Objects panel is key for this, and
it's a
...
...
...
>> hugely
>> awesome addition to Inkscape!  The only part I struggle
with
...
...
...
>> is that
>> Inkscape doesn't want to let you reorder objects relative
to
...
...
...
>> each other
>> if they don't intersect (or nearly intersect).
>>
>> Ultimately, the problem I brought up for discussion boils
>> down to the
>> same problem you're solving with the your TSP algorithm.
>> *Question:
>> *what does your code do if it needs to get from one
section
...
...
...
>> to another
>> that is distant?  Does it just jump-stitch?
>>
>> Here's a brief description of how to use
EmbroiderModder2's
...
...
...
>> libembroidery to convert between formats:
>> https://github.com/lexelby/inkscape-embroidery#optional-c
onve
...
...
...
>> rsion-program
>>
>> I'd suggest that your code simply output a CSV in the
format
...
...
...
>> libembroidery understands, and then you can make use of
its
...
...
...
>> knowledge of
>> pretty much every manufacturer format to convert it to a
>> format
>> compatible with your machine.
>>
>> --Lex
>>
>> On 7/30/2017 11:47 AM, Michael Soegtrop wrote:
>>> Dear Lex,
>>>
>>> I guess we are trying to solve the same problem, but
>>> differently. I
>>> wanted to have more control than semi automated fillers
>>> provide, so I
>>> added 3 LPEs, which are in Inkscape 0.92.2:
>>>
>>> 1.) A bool LPE to do intersections / unions, ... of
areas,
...
...
...
>>> so that one
>>> can construct the areas to stitch from drawing areas.
>>>
>>> 2.) A path / path group trimmer LPE, which restricts a
set
...
...
...
>>> of paths to
>>> an area (or oustide of an area. There are already two
path
...
...
...
>>> interpolation
>>> LPEs which allow to create sets of paths with fine
control
...
...
...
>>> over local
>>> direction and density.
>>>
>>> 3.) An LPE to convert a set of paths into stitches.
This
...
...
...
>>> includes an
>>> almost reasonable traveling salesman problem (TSP)
variant
...
...
...
>>> solver for
>>> ordering groups of stitches to minimize the traveling
in
...
...
...
>>> between. It can
>>> still be improved. It is a bit more complicated than
>>> standard TSP
>>> solvers, because it looks into groups of parallel
stitches
...
...
...
>>> which have 4
>>> possible ends.
>>>
>>>
>>> My approach is as follows
>>>
>>> 1.) Make a drawing
>>>
>>> 2.) Use the bool op LPE to create (in a new layer) the
>>> areas to fill
>>> with each color / stitch style.
>>>
>>> 3.) Create a set of path to control density and
direction
...
...
...
>>> using path
>>> interpolation LPEs. This allows a great deal of
control,
...
...
...
>>> e.g. for hair.
>>> I don't think any commercial tool allows this amount of
>>> control.
>>>
>>> 4.) Use the path trim/cut LPE to trim the paths created
in
...
...
...
>>> 3.) to the
>>> areas created in 2.)
>>>
>>> 5.) Use the embroidery stitch LPE to convert the paths
to
...
...
...
>>> stitches.
>>>
>>> Sometimes I use the cut / trim filter also to create
>>> intermediate nodes
>>> in paths to create special stitching patterns. These
nodes
...
...
...
>>> are not
>>> visible in normal drawing, but after stitching they are
>>> visible.
>>>
>>> Of cause for simple cases, it would help to extend it
with
...
...
...
>>> a more
>>> automated approach, which is what you appear to be
working
...
...
...
>>> at.
>>>
>>> I am very interested in the import/export library you
>>> mentioned.
>>>
>>> It would be great to work together on this.
>>>
>>> Best regards,
>>>
>>> Michael
>>>
>>   
>   
> -- 
> ===========================================
> = Dipl. Phys. Michael Sögtrop
> = Datenerfassungs- und Informationssysteme
> = Steuerungs- und Automatisierungstechnik
> =
> = Anzinger Str. 10c
> = 85586 Poing
> =
> = Tel.: (08121) 972433
> = Fax.: (08121) 972434
> ===========================================
>

...
...
...

Check out the vibrant tech community on one of the world's
most
...
...
...
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Inkscape-devel mailing list
Inkscape-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/inkscape-devel

...
...

Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Inkscape-devel mailing list
Inkscape-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/inkscape-devel

...

Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Inkscape-devel mailing list
Inkscape-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/inkscape-devel

This email has been checked for viruses by AVG.
http://www.avg.com

Re: [Inkscape-devel] Embroidery extension

Mark Schafer