Doodleback: How you can draw decides what you can draw.
What is Doodleback?
A lot of drawing apps let you construct a circle but usually in only one way. They let you copy on object but in only one way or erase in only one way. But what if you wanted to erase with a star? To draw a circle from edge to edge? To copy not by translation but by rotation? Doodleback’s philosophy is that how you can construct something is almost as important as what you can construct. Being able to precisely place objects at the moment of their creation makes simple many drawings that would otherwise be difficult or almost impossible.
Doodleback is a collection of tools for the creation and manipulation of graphical objects, called Paths. Everything you draw in Doodleback is an independent path. It can be moved, rotated, scaled, flipped, bound to other paths, and warped. Its color can be changed. It can be pulled above other paths and pushed beneath them. It can be copied. It can be deleted–not merely erased but actually removed entirely. If you can imagine how to manipulate it in the real world, you can probably do it in Doodleback.