Force Field

In haptic interface design, a computational model that defines attractive or repulsive forces at each point in a two-dimensional workspace, used to represent graphical user interface elements as tactile objects. When a user moves a haptic pointing device through a force field, they feel physical forces that convey the presence, boundaries, and properties of virtual objects. For example, an icon might be modelled as an attractive force field that pulls the pointer toward its center, making it easier to locate and select. Window boundaries can be modelled as channels or walls that the user feels resistance against. Force fields can be designed with different strengths and profiles to distinguish between interface elements of varying importance or size, and can be created and edited using specialized force field editor software.