paths

Fractalize Path

ffaat — Tue, 28 Jul 2009 21:20:42 +0200

This script will take the active path and fractalize it, using a random midpoint displacement algorithm, with the displacement proportionate to the length between nodes. Also the nodes don't move.

Parameters are:

Subdivisions - number of iteration to divide each segment in half... so for a value of 3 the line between two nodes is replaced by 8 new lines.
Method - Uniform or Gaussian... the distribution of the displacement.
Smoothness - Higher = less displacement, lower = more displacement.
Interpolate First - Not checked, it will subdivide between nodes. Checked, it will walk the path and create new evenly spaced noted. These nodes will not likely line up with existing nodes, so is not great for accurate replacement, but is super for fractalizing a smooth shape, or a path created from a selection.
Interpolate Pixel Spacing - if Interpolate First is checked, the spacing to use.
Create New Path - if checked, it creates a new path. If unchecked, it replaces the active path.

Credit to the inkscape fractalize path extension algorithm, and the box mueller gaussian code from wikipedia.

The script creates a new entry in the path dialog menu, so right click on a path and select "Fractalize path.

-Rob A>

Measure Active Path

cr33dog — Sun, 05 Jul 2009 22:05:20 +0200

Returns the length of the active path in pixels via gimp_message. A message will appear in the status bar, unless the Error Console is opne - in that case the message will be directed to the Console.

Filters->Measure->Active Path

Tested with 2.6.6 on Ubuntu 8.10 and Win XP.

Tapered Stroke on Path

RobA — Tue, 30 Sep 2008 04:37:51 +0200

Draws a tapered stroke along a path using the current tool, specifying the start and end stroke width.

Details and example are located here.

Split path into strokes

LightningIsMyName — Thu, 21 Feb 2008 15:19:09 +0100

This script takes a vector object (path) and split's it into it's different strokes - each stroke as a new path.

Useful in cases that an action is needed to be done only on one stroke of a path.

Currently this script is updated for GIMP 2.4 or higher.

Rotating Brush Assistant

RobA — Fri, 15 Feb 2008 05:31:35 +0100

This script help to set up a rotating (animated) brush. Starting with one (or more) brush images, it will create rotated copies of that image in a way to allow saving the file as a gih.

Just start with an image oriented in the "drawing upwards" direction:

and run the script. With the defaults it will create a new image having all the rotated copies:

Now save it as a .gih in your brush folder, and refresh the brush list.

Here is a sample drawing with this brush. The right squiggle uses tablet pressure sensitivity to change the size.

It will work with any shape image, but it only rotates a circle, so try to keep the image inside To make a Colour brush, start with a RGB image with transparency, and check the option in the make brush dialog. For a normal brush, make it a greyscale image with no alpha. White will end up transparent, and greys will end up partially transparent.

It will also rotate multiple images if you start with them stacked vertically, and tell the script how many images you have:

Source Image:

Created by script:

How to save this to follow the angle and alternate between the rows:

and a sample. (I toggled on "Use Color from Gradient" in the paint tool dialog in the lower half):

The script registers itself as Script-Fu->Utils->Setup Rotating Brush

SVG Export

gorenje — Mon, 07 Jan 2008 11:35:19 +0100

Extends the functionality of /Export Path by allowing for the specification of attribute values (fill,stroke,etc) by encoding these into the path name. Export path values as SVG file. Script assumes that the path name is an encoding of SVG attributes.

These are encoded using:

_[2 letter code][value]_ where 2 letter code is one of:

fc => fill color (SVG attribute: fill)
fo => fill opacity (SVG attribute: fill-opacity)
nm => name of the path (SVG attribute: id)
sc => stroke color (SVG attribute: stroke)
sj => stroke line join (SVG attribute: stroke-linejoin)
sl => stroke line cap (SVG attribute: stroke-linecap)
so => stroke opacity (SVG attribute: stroke-opacity)
sw => stroke width (SVG attribute: stroke-width)
tp => type of shape can be: circle,rect,polyline,polygon

The value can not contain an underscore and exact values for attributes can be obtained from the SVG Specifications: http://www.w3.org/TR/SVG

For example:

_fcwhite_scblack_tppolyline_slbutt_sjmiter_nmexample_

would decode to:

<polyline points="..." fill="white" stroke="black" stroke-linejoin="miter" stroke-linecap="butt" id="example"/>

Loading the resultant SVG file is only possible if you have SVG support compiled in, but you can export SVG using this script.

Shape Paths

JonStipe — Thu, 03 Jan 2008 02:54:37 +0100

This is a collection of Script-Fus that create Paths in the form of geometric shapes. Squares, rectangles, rounded rectangles, circles, ellipses, ovals, polygons, stars, flowers, gears, triangle waves, square waves, and sine waves are currently supported.

Version 0.91 is updated for GIMP 2.4.x! It now supports automatic stroking and filling!

How to install:

Right-click on the link below that says "shape-path-0.91.scm". A pop-up menu should appear. Click "Save Target As..." or "Save Link As..." or whatever the equivalent option in your browser is.
Save the file "shape-path-0.91.scm" in your scripts folder. If you're not sure where your scripts folder is, you can check by opening GIMP and going to <Toolbox>/File/Preferences -> Folders -> Scripts. If more than one folder is shown, then any one of them will work.
Once you have saved the file in your scripts folder, if you are already running GIMP, either click <Toolbox>/Xtns/Script-Fu/Refresh Scripts, or just close and reopen GIMP.
If you have done this correctly, the scripts will appear in the menu under <Image>/Script-Fu/Shape Paths. If this menu is not there, try clicking <Toolbox>/Xtns/Script-Fu/Refresh Scripts. If it's still not there, make sure the file is in your scripts folder and that the filename ends with ".scm", not ".txt" or ".scm.txt" or something.