FlowBetween has acquired a new trick over Christmas - flood-fills:

The algorithm is based on ray-casting and can produce a shape even from quite complicated paths, and even paths that are incomplete, like this:

Iāve got quite a few things to do to improve the tool at the moment. One thing I want to add in particular is automatically joining fills that border each other into a single shape (as well as a bunch of other arithmetic operations. Iāve got some other ideas like using the same algorithm to simplify outlines - welding lines together based on the area they encompass and adding options to restrict the area thatās filled or the size of gaps through which the fill can āescapeā.
However, Iām trying to visit features briefly and move on rather than spend too much time on a single feature so this week I think I might have a look at the UI layer. The Gtk UI is currently missing a couple of controls and seems to have stopped responding to clicks for some reason, and Iāve wanted to add a Cocoa UI for a while now so that Iām not quite so tied to development in the browser.