Just for fun, I have added a new shape to my symbol node: Squircle.
A squircle is like a rounded rectangle but without any straight edges:
https://en.wikipedia.org/wiki/Squircle
Squircles are commonly used in app icons (Apple uses a precisely designed version) and are commonly seen in the real world as plates: they have no sharp corners, pack in the same space as a round plate, but hold more food.
There are two different mathematical definitions of a squircle, and many subtle variations in different computer contexts. My squircle is extremely simple and, I think, closely matches the mathematical squircles.
The attached demo shows the difference between a squircle and a rounded rectangle.
UPDATE. The symbol node is now called "shapes". https://forum.nodebox.net/t/9144045562/shapes-formerly-symbol
Enjoy!
