Dynamic Line thickness

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vdd0101
Posts: 3
Joined: Tue Sep 20, 2011 7:35 am

Dynamic Line thickness

Postby vdd0101 » Tue Sep 20, 2011 7:44 am

Hi,

I quite new to Inkscape to this question may be stupid but I couldn't find the answer by searching so here goes!
I have seen people outline a picture or something when making an image and they have managed to make the line thickness vary at certain places. This is the effect I am trying to achieve. I heard about using a tablet with the calligraphy tool but I don't have a tablet and I would like to be able to achieve this by dragging some nodes around. Is this possible and if so how?

I do hope I am being descriptive enough, if I have not explained it properly please tell me.

Thanks!

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brynn
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Location: western USA
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Re: Dynamic Line thickness

Postby brynn » Tue Sep 20, 2011 9:48 am

Image
Welcome to InkscapeForum!

You can use the Calligraphy tool without a tablet, and just draw with the mouse. With practice, you should be able to draw the lines with thickness where you want it, and perhaps not need to edit the nodes. But you certainly can edit the nodes too.

Or are you thinking about scanning in drawings that were done on paper? In that case, you will have to use Trace Bitmap, to convert it to vector. After that, it will have nodes that you can edit.

Also, lines that are thicker towards the middle can be drawn with Pen or Pencil tools, in spiro spline mode. This would usually be to create decorative objects, like scrolls, curly Qs and such, rather than to make traditional line drawings. For traditional line drawings, where you want to vary the stroke width, the Calligraphy tool is best.

If this doesn't answer your question, then maybe a screenshot or something, to show what you want to do, would help :D

vdd0101
Posts: 3
Joined: Tue Sep 20, 2011 7:35 am

Re: Dynamic Line thickness

Postby vdd0101 » Wed Sep 21, 2011 1:59 am

Thanks for the help, I do appreciate it.

This image is not mine but I got it off google images to show the effect I am looking for. How the line thickness varies a lot, even on the same line, is what I am trying to do.

Image

Thanks!

dvlierop
Posts: 139
Joined: Sat Sep 08, 2007 4:25 am

Re: Dynamic Line thickness

Postby dvlierop » Wed Sep 21, 2011 5:37 am


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sas
Posts: 404
Joined: Sat Oct 06, 2007 5:42 am

Re: Dynamic Line thickness

Postby sas » Wed Sep 21, 2011 6:25 pm

vdd0101 wrote:This image is not mine but I got it off google images to show the effect I am looking for.

For an effect like that you should use the calligraphy tool, probably with something close to the default settings for most of the strokes. Methods such as pen or pencil tool with shaping, or the new PowerStroke path effect, are good for more regular changes of line thickness.

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Maestral
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Joined: Sat Aug 27, 2011 7:10 am

Re: Dynamic Line thickness

Postby Maestral » Wed Sep 21, 2011 6:49 pm

Is the PowerStroke path effect already available? I thought it would be among v.0.49 improvements.
:tool_zoom: <<< click! - but, those with a cheaper tickets should go this way >>> :!:

vdd0101
Posts: 3
Joined: Tue Sep 20, 2011 7:35 am

Re: Dynamic Line thickness

Postby vdd0101 » Thu Sep 22, 2011 2:19 am

I dont think powerstroke is available. I cant find it in path effect editor.

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RobA
Posts: 335
Joined: Fri Aug 10, 2007 1:22 am

Re: Dynamic Line thickness

Postby RobA » Thu Sep 22, 2011 2:42 am

It is available if you compile inkscape yourself with the LPEs enabled. See the bottom of dvlierop's second link.

-Rob A>

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Maestral
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Joined: Sat Aug 27, 2011 7:10 am

Re: Dynamic Line thickness

Postby Maestral » Thu Sep 22, 2011 4:32 am

Oh boy, oh boy... hole thing about compiling is a bit too much for me now.
:tool_zoom: <<< click! - but, those with a cheaper tickets should go this way >>> :!:

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RobA
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Joined: Fri Aug 10, 2007 1:22 am

Re: Dynamic Line thickness

Postby RobA » Thu Sep 22, 2011 5:55 am

I've also purchased Serif Drawplus X5 to complement my Inkscape/Gimp work.

One nice feature is you can enable "pressure profiles" on any line created by a pressure sensitive tablet, or if no tablet, they provide a dialog to create a profile that can then be applied to a line or lines.

Here is a screen shot showing such a line and in the lower right corner is the profile editor.

2011-09-21_153733.jpg
2011-09-21_153733.jpg (146.34 KiB) Viewed 6132 times


The same thing can be done in inkscape's LPE, but not as easily.

-Rob A>

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brynn
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Re: Dynamic Line thickness

Postby brynn » Thu Sep 22, 2011 6:49 am

Interesting stuff, RobA :D

So yes, vdd0101, the Calligraphy tool is indeed what you need. At least until this new PowerStroke thing comes out in the next major version release.

jonnycross
Posts: 10
Joined: Sun Sep 04, 2011 6:59 pm

Re: Dynamic Line thickness

Postby jonnycross » Mon Oct 31, 2011 6:38 pm

I just duplicated the image, then turn off the stroke on the bottom image and turn off the fill in the top one.
then change the stroke to path and use the nodes and path to give the effect you want.
regards JC


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