Creating abstract shape

[kronos]

In Ink there is this image i would like to create but don't know how to start. Could you tell me what tools should I use to make this? 
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[brynn]

Oh wow!  That certainly requires advanced skills!

I think there is some info about it in the comments, where the image is hosted on the Inkscape website.  https://inkscape.org/en/~artelnjeru01/%E2%98%85about-092-2-good

And the same artist submitted a 2nd one, made the same way.  I don't know if there are any comments on that one or not, but here's the link:  https://inkscape.org/en/~artelnjeru01/%E2%98%85about-092-11

[kronos]

Krita has some brush with similar dynamic but I was wondering can this be made proceduraly in Ink?

[brynn]

As you probably know, Inkscape doesn't have brushes.

But the artist explains how he made it, in the comments below the image, on the website.  I put links in my last reply.

Edit
I should probably ask what you mean by "procedurally".  I know it's a trendy expression these days, but it's meaningless to me.  Are you asking for steps, 1-2-3 ?

[kronos]

As you probably know, Inkscape doesn't have brushes.

But the artist explains how he made it, in the comments below the image, on the website.  I put links in my last reply.

Edit
I should probably ask what you mean by "procedurally".  I know it's a trendy expression these days, but it's meaningless to me.  Are you asking for steps, 1-2-3 ?

Apps like  Apophysis, Amaziograph and Mandelbulb3d. User can set inital parameters and create something and dynamically change it.

[brynn]

Apps like  Apophysis, Amaziograph and Mandelbulb3d. User can set inital parameters and create something and dynamically change it.

So it sounds like you're asking for LPEs for Inkscape? (Live Path Effects)  The extensions are sort of live, if you use the Live Preview.

[Lazur]

Inkscape is hardly procedural.

Only similarities are the filters and the path effects.
The image you are after was drawn with the interpolate subpaths lpe. That requires two subpaths "pre-drawn", the original drawing used photographs as a reference to "eyeball" those.
There is no way to simulate physics that would alter a stroke's appearance as you suggest. The closest inkscape can offer is the powerstroke lpe, where you need to pull handles to define the stroke's width.
You could try a pattern along path with an interpolate subpaths path effect stacked but it won't make it as easy as a pie.

[kronos]

• How do I gradually change the color ?

I did this

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[Lazur]

You can change colour gradually once you convert the object to path, break subpaths apart and group them together, and by running the interpolate attribute in group extension after.
Although the original only had radial gradient strokes added -you can check the svg, the about screen image is provided with inkscape (inkscape/share/screens).

[kronos]

I think I slowly getting to somewhere


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[Lazur]

Hope the video can be embedded:
[video]https://youtu.be/7ayhURO4fGY[/video]

[v]https://youtu.be/7ayhURO4fGY[/v]

[yt]https://youtu.be/7ayhURO4fGY[/yt]

-if not, just follow the link:


The spiro spline lpe is unnecessary for the effect and you'd need a shorter trajectory path compared to the overall shape.

[kronos]

Thank you.

I opened the file and in some point accidentally go to node view of the path. Inkscape 0.92.2pre0 froze and I had to force quit in task manager.
I saw your viewport was slowed down also.

[brynn]

Hope the video can be embedded:

You should be able to embed a video.  I have a mod installed for it.   I don't use videos myself, so I've never tried it.

Ok, I found some options that might not have been set right.

Should be working now.

You don't have to use any bbcode.  It does it automatically by recognizing the link.

[Lazur]

Should be working now.

Thank's for the info!

[kronos]

While trying to to interpolate sub pats with 2 modified circles, Ink 092.2 crashed again and I experienced slowdown.
Do I need to have some faster CPU as minimum requirements.

[Lazur]

Doubt it -inkscape has its flaws in pc useage. If you split nodes and apply the effect on open subpaths the result should be more stabile -at least that's how I see it.

[brynn]

If your computer is relatively modern, you should be ok. Often when Inkscape crashes because of lack of resources, there's no computer big enough, haha.

I see there in your screenshot a flower or star shaped object.  Is that one of the modified circles?  What does the other one look like?  And where is it?  (I mean is it inside that one, or outside that one?) Also, how many steps are you trying to make?

It also matters what else is in the file.  Is there anything else in the file?  If so, how large is it?  And how much RAM do you have?

The short trip to the answer would be to provide the SVG file for us. 

Edit
Also, by the way you said "interpolate 2 sub paths" you probably mean using the LPE?  (There's also an extension that can interpolate.)

[kronos]

I see there in your screenshot a flower or star shaped object.  Is that one of the modified circles? 

Yes.

What does the other one look like?  And where is it?  (I mean is it inside that one, or outside that one?) Also, how many steps are you trying to make?

It was handrawn spiro spline. I was curious what could flower look like interpolated to other path.  I was outside of the frame.

The short trip to the answer would be to provide the SVG file for us. 

It froze so I force quit it

Also, by the way you said "interpolate 2 sub paths" you probably mean using the LPE?  (There's also an extension that can interpolate.)

Yes by LPE.

[brynn]

Without having an example, I would say don't use the spiro spline itself.  After you make the spriro spline path, use Path menu > Object to Path.

My guess would be using a "live" spiro spline is causing the problem.  If you've played around with spiro spline very much, you may have noticed there are certain times when the path sort of goes berserk, and draws hundreds of coils and scribbles, sometimes many times larger than the page.  I've had a single spiro spline path freeze Inkscape before! 

If you haven't seen that, you can try it.  Just make a spiro spline path with 5 or 6 nodes, open or closed.  Then switch to the Node tool, and drag some of the nodes around.  Usually for me, it's when they get close together when they turn to scribbles.  But you could also make it happen by just flipping a spiro spline path, or rotating it, or sometimes just moving it around the canvas.

(It's a bug.  But I've actually made the bug happen on purpose sometimes.  Kind of like a child seeing shapes in a cloud, I'll see something in the scribble, and then convert it to a path, and start to edit, to emphasize whatever I saw there.  Or sometimes I just like the design, and make into an abstract image.)