A crossing based drawing application

We introduce CrossY, a simple drawing application we used as a benchmark to demonstrate the feasibility of using goal crossing as the basis for a graphical user interface. We show that crossing is not only as expressive as the current point-and-click interface, but also offers more flexibility in interaction design. In particular, crossing encourages the fluid composition of commands making it easier to create more fluid interfaces. While crossing was previously identified as a potential substitute for the classic point-and-click interaction, this work is the first to report on the practical aspects of implementing an interface based on goal crossing as the fundamental building block.