Paint Paths in Steps plug-in

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1824

Pretty sure it could be done in gimp, but no idea how to code it. Probably just as easy to make a bunch of duplicate frames and start erasing one at a time in reverse.

The principal I used is the same as using a layer mask.

Wallace · **Posted:** Wed Jun 05, 2019 7:35 pm **(#42)**

racer-x wrote:

Pretty sure it could be done in gimp, but no idea how to code it. Probably just as easy to make a bunch of duplicate frames and start erasing one at a time in reverse.

The principal I used is the same as using a layer mask.

Right.
It's amazing how simple this concept is,
but how difficult it can be to reproduce in Gimp.

trandoductin · **Posted:** Wed Jun 05, 2019 8:00 pm **(#43)**

It can be done in GIMP...
1) The current script just use the active brush to paint a bit of the path at a time
2) then makes a layer from visible as a new frame at each step.
I just have to add a drop shadow between 1) and 2) and delete the shadow after 2) and voila.
Let me go and do that right now.

UPDATE: please check version 3.

Wallace · **Posted:** Wed Jun 05, 2019 8:32 pm **(#44)**

trandoductin wrote:

It can be done in GIMP...
1) The current script just use the active brush to paint a bit of the path at a time
2) then makes a layer from visible as a new frame at each step.
I just have to add a drop shadow between 1) and 2) and delete the shadow after 2) and voila.
Let me go and do that right now.

trandoductin · **Posted:** Wed Jun 05, 2019 8:35 pm **(#45)**

Please check version 3!

Wallace · **Posted:** Wed Jun 05, 2019 8:38 pm **(#46)**

trandoductin wrote:

Please check version 3!

[ Image ]

Would I need to change the to "Normal Mode" with in the file,
to have it run in 2.8?

Edit

Never mind,
I already did it.

teapot · **Joined:** Dec 09, 2018 **Posts:** 644

That's so cool, thank you trandoductin :bigthup

teapot · **Joined:** Dec 09, 2018 **Posts:** 644

Nidhogg wrote:

drawing Goofy.
Exported the initial animation layers (Ofnuts ofn-export-layers.py: image{numUp1}.png naming to make sure they are in correct order)
Flattened the animation result, used path tool to create pencil zigzag over color area.
White layer above, merged down, changed foreground color and used the plug-in.
Last frame of each step (the work layer image can be also used) was changed to multiply mode and combined with next animation frames, using Saulgoode's combine/overlay script.

Love your shading, thank you for explaining how it's done, I've had a go.

rich2005 · **Joined:** Mar 04, 2011 **Posts:** 2418

Nidhogg wrote:

@rich yeah I knew the hershey in Inkscape.
Can you please upload the *buntu 18 version and instructions? ...snip...

@Nidhogg

The linux autotrace attached along with the inkscape centerline-trace extension (same as before).

There is a dependency, libpstoedit. Unzip the attachment, the permissions should already be set (but check anyway). From where that is, in a terminal copy autotrace to /usr/bin and install pstoedit which will pull in that dependency. Check that it works

Code: Select all

 sudo cp autotrace /usr/bin/
sudo apt install pstoedit 
autotrace --version

Another video demo showing it working in Inkscape and how I might prepare for that Gimp animation script.

https://youtu.be/XJg3HM-i_PY duration 4 and a half minutes.

Nidhogg · **Posted:** Thu Jun 06, 2019 6:18 am **(#50)**

Thank you so much for your help rich, you're the man :bigthup

Took a minute on MX Linux 18.3, works perfectly which means there won't be any problems on Xubuntu either.
There was one other dependency that had to be installed, python-pil.
If I remember correctly back with 0.48 on Windows that was the stumbling block for many people.

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1824

Thanks rich2005, I got it installed. I had to add a couple of more dependencies, it works now. Here is my first test, though I didn't re-arrange the path order like I should have. If nothing else, this will make a better mask for regular font text.

Attachment:

test.gif [ 95.4 KiB | Viewed 2282 times ]

Nidhogg · **Posted:** Thu Jun 06, 2019 6:53 am **(#52)**

Test run with a random b/w clipart image.

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1824

I thought of that too Nidhogg, well done. I was right about center-line making a better mask...

Attachment:

text2.gif [ 218.95 KiB | Viewed 2273 times ]

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1824

Tested Center-Line Extract on a dragon drawing. This was a big one 455 frames. Surprised nothing crashed...

Attachment:

Dragon2.gif [ 110.18 KiB | Viewed 2239 times ]

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1824

I do believe that Heresy Text in Inkscape yields the best outcome for this plugin. I think I'll stick with that option for these things.

Attachment:

racer.gif [ 66.04 KiB | Viewed 2239 times ]

SeriousTom · **Posted:** Fri Jun 07, 2019 1:50 pm **(#56)**

Wallace wrote:

racer-x wrote:

According to this page, it will be integrated in version 1.0 of InkScape. I downloaded the alpha 1.0 version in an appimage, but it doesn't have it.

https://github.com/fablabnbg/inkscape-centerline-trace

The center-line tracing of a font can be done in Gimp.
Although it's only a tracing,
it works just fine for my needs.

Those "stick fonts" linked to by Nidhogg look promising.

Hi Wallace,
I can't seem to find in Gimp 2.10.10 what filter can do the center-line tracing of a font.
I've given up.
What is it ? :snap

Wallace · **Posted:** Fri Jun 07, 2019 2:06 pm **(#57)**

SeriousTom wrote:

Hi Wallace,
I can't seem to find in Gimp 2.10.10 what filter can do the center-line tracing of a font.
I've given up.
What is it ? :snap

Hello SeriousTom,

I guess I wasn't exactly clear,
about my mention of "center-line tracing".
As far as I'm aware,
there isn't a filter, script or plug-in for Gimp,
that will do the center-line tracing.

What I meant is,
that I do the tracing manually,
or by hand,
using the paths tool.

Sorry SeriousTom,
for any confusion I my have added to this.
:oops:

SeriousTom · **Posted:** Fri Jun 07, 2019 2:12 pm **(#58)**

Thanks Wallace, no problem.

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1824

Not quite true, this plugin does Center-Line Tracing in Gimp: http://gimpchat.com/viewtopic.php?f=9&t=17485

I tested it, but not sure yet of it's abilities. Perhaps you may want to try?

teapot · **Joined:** Dec 09, 2018 **Posts:** 644

Used Ofnuts' ofn-path-inbetweener.py to make multiple lines.

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