I'm considering repackaging together a bunch of small scripts that perform rather simple operations on paths: delete strokes, decompose the path, splice strokes, etc... to make a simple path edition toolbox.

The goal is to include simple editing steps

• that don't require dialog input
  
• that perform tasks that are either impossible to do by hand and that can do them significantly faster (cut-off point would be 3-4 clicks without a script)
  

• delete strokes: delete strokes with an end in the selection.
  
• extract strokes: keep strokes with an end in the selection.
  
• reverse strokes: swap stroke end to end (no visible result but often useful).
  
• splice strokes: connect together strokes with end points sufficiently close.
  
• cut strokes: cut strokes on the anchor point in selection (this is the opposite of the "splice" above, a stroke with thee anchors will produce two strokes of two anchors, where two anchors will coincide)
  
• intersect strokes: cut and splice two strokes where they intersect. The $64K question is to have a good criterion to determine which of the 4 angles to keep.
  
• decompose strokes: decomposes a path into its individual strokes. Unlike the rest this one would create additional paths.
  
• summary: show a summary of the path information (to check that what you got is actually what you see).
  

Coming from this thread:
http://www.gimp-forum.net/Thread-80ies-c...435#pid435

There are several problems with making a perspective grid:
1. for a real perspective you'd have to set up a horizonline and a vanishing point, right ?
2. Also for a real perspective grid, the horizontal lines would need to get closer, the more distant they are.

The perspective tool in Gimp is not a real perspective tool. It doesnt follow any perspective rules, unlike Inkscape's perspective extension or LPE.
Gimp's perspective tool is just a sort of free transform.

So lets say we throw that out of the window and make a fake perspective grid instead.

Im using a 640x400px canvas and with ofnuts' Path-grid plug-in, i set up a grid 36x36px.
I also set up guides around the edges of my canvas, and at 50% horizontally.

   

Heres the first problem:
i cant put guides outside the canvas, which i need as guidance and for snapping. If i want to stretch out the grid at the bottom, i have to extend the canvassize.
The perspective tool doesnt seem to give me any help with the coordinates.

So im setting up two additional guides 200px away from the edges of my original canvas after i extended my canvas.

   

Next problem: when i use the perspective tool in path mode, its applied to the whole canvas.
Im fixing that by alpha selecting my original canvas size.

   

After i applied the fake perspective to my path grid, i stroke the path on a new transparent layer.

   

Comments ?

Was trying to get a grid in perspective and almost went crazy.
First attempt in Inkscape, but using the new Perspective LPE almost crashes the program.
Next watched a few YT tutorials
So made a grid in Inkscape, imported the svg into Gimp and behold: with a bit of trial and error of the Perspective Tool, is much easier !

Question: why can i move loads of nodes easily within Gimp, but not in Inkscape ??

I bought a book, called the 'WOW Book 4' for 2€'s.
Its from 1998 and teaches how to use Photoshop. Included are some interesting effects and a CD with images, actions, goodies, etc.

Im very interested in this stuff, because of all my old electronic music record covers that i have from the mid-late 90ies.
A lot has changed since then.

Interesting fact: apparently PS had no layer effects back then. All the texteffects are done with 'Lighting Effects' which looks very similar to the same filter we have in Gimp.
Also with every lighting effects tutorial, there is a warning that you need a lot of RAM to use it

A lot of the images on the CD are quite small, by todays standards, which makes me wonder how they printed.
All the illustrations in the book are small. Sometimes it makes it hard to read.
Also all the steps for every tutorial are written for beginners.

Some of the shiny effects for crystal, chrome and metal are done with the Plastic Wrap filter (there are a few scripts on the net for doing that in Gimp...or G'MIC Relief Light).

https://sourceforge.net/projects/gimp-pa...s/scripts/

Its getting a bit hard to keep track on which board i can find the relevant information

Is there a documentation page ?

What does 'Accuracy' and 'Guide Path' mean ?

Can python plug-ins that work with paths in Gimp, be modified so that they work in Inkscape, or is that a complete different approach to writing code ?

Im asking because trandoduction wrote the 'Select Area Between Paths' plug-in and it would be great to have something like this as an extension for Inkscape.

When I try to place the vertical guides (the ones I move from left hand ruler), they disappear as soon as I let go of the move tool. Earlier it was the horizontal guides which were playing this trick.

I have seen edit> preferences but could not make out what adjustments are wrong.

Can someone help me please to restore guides.

I almost always uncheck 'snap to guides' under 'view' when I try to place guides.

OS Ubuntu 14.04; GIMP - the version available in software centre (no addl plugins, plugouts)

So after ofnuts boggled my mind with his sine wave magic, i used a bw bi-linear gradient, with a duplicate set to 'Difference', posterized to get this seamless pattern:

   

After bumpmapping the pattern into a grey layer, curves and a bit of processing, then G'MIC Sepia, i got this, which i like for its 3D-ish quality: