You want to keep the lines straight or go for a fish-eye lens look?
Photoshop's Liquify > Bloat Tool can do this in 5 seconds…
That would require you changed the content first in vector, then bloat a rastered image.
As Billy pointed out it is not actually possible, so to get around this issue I first drew the whole head, and then I drew a rectangle over the top for details and lined that up with the arches of the head itself.
I don't think you need to add nodes to achieve your desired result.
Here's one method that works well for complex overlapping shapes you want to cut out:
Draw overlapping circles
Select all the circles, click Path > Combine
Draw a rectangle, click Object > Lower to Bottom
Select all shapes and the rectangle, and click Path > Division. This will make all ...
Inkscape's circles are not Bezier curves. The node tool and many other path editing methods do not work as expected.
Select a circle, apply Path > Object to Path. The circle is now editable path like those you have drawn with the pen. You can add new nodes with the node tool and use all available other path editing methods.
Warning: "Stroke to Path" ...
You could use the Construct Grid path effect. I think this could solve both your use cases.
Draw a rectangle 25.4mm wide
Then in the Path Effects panel (Shift+CTRL+F7), add a new Path effect and choose Construct Grid.
Then in the path effects panel, set X to 1, and Y to the number of segments required
These could be turned into actual guides by ...
If it's an outline font, there's no easy way to do this as far as I'm aware, but it can be done manually by using the Fill Bounded Areas tool (aka the Bucket Fill tool).
Set the tool options to Fill by "Lightness", Close Gaps "Medium", Grow/ Shrink by "0", and the Threshold to something like 25% (this setting will depend on the artwork and you may need to ...
I don't know if this is possible inside Inkscape, but if you open the .gpl file in a text editor it's actually readable and easy to edit. Here is an example:
153 153 153 #999999
0 128 0 #008000
211 141 95 #D38D5F
255 0 0 #FF0000
255 127 42 #FF7F2A
The first three columns are the RGB values of the colors. The fourth ...
When using paste (Ctrl+v) vectors from Inkscape then You should have "stroke style" width zeroed out. If not, then you will end up with two lines according to thickness of the lines. So better to have filled up vector with zero stoke width.
I don't know if this is true when importing vectors to Fontforge from Inkscape but logically it should be so.
One think ...
There isn't a way to change Illustrator's default 72ppi setting, as far as I'm aware.
The problem you are describing has been around for some time, and there are questions about it on the Adobe community site, but still no fix from Adobe. Adobe doesn't currently seem to care about SVG standards, and I wouldn't hold my breath waiting for a fix.
Here's my ...
This may be a small consolation. Whilst I haven't found any easy method to have Illustrator and Inkscape utilise the same DPI system to transfer between each other with SVG's.
I did however find that if I save the Illustrator files in their native .AI format, when opened in Inkscape they will be dimensionally accurate.
If someone finds a better solution ...
What you are looking for is 'exclusion' which is in the path menu about 7 items down:
make big circle (say red)
make shape object to delete from it (say grey)
put grey object over red object
select both with mouse
This is how I make the 'doughnut' in a 'no' symbol (aka circle slash)
If you want perfectly smooth curves, then auto tracing a poor quality bitmap is probably not the best way to do it.
Instead, you could manually trace over the lines of the bitmap with the Bézier tool set to apply an ellipse as the Shape in the tool options. This creates a Path Effect. Then you could alter the thickness of the Path Effect by clicking and ...
A little late to the party, but I found that if you Print to File File → Print → Print to File, it works fine. This was on an Ubuntu machine, but this prevented me having to turn the text into un-editable objects.