Agentsheets: applying grid-based spatial reasoning to human-computer interaction

This paper argues that grid-based spatial reasoning can significantly improve human-computer interaction. While grids constrain the user's ability to position objects on a screen on one hand, they greatly increase the transparency of functional relationships among these objects on the other hand. A system called Agentsheets employs a spatio-temporal metaphor of communicating agents sharing a structured space. This domain-independent metaphor can be used to create domain-oriented visual programming systems. This paper explains how Agentsheets fits into the spectrum of domain-orientation ranging from general purpose visual programming languages to domain-oriented construction kits, gives a short introduction of Agentsheets, sketches sample applications, and evaluates the contribution of grid-based spatial reasoning to human-computer interaction.<<ETX>>