Fig. 12

Prototype of interactive design of VEs. Left: user-defined parameters expressing the map size, landmark names and locations, and route layout. ISC represents geographic scale at individual locations. Right: Solid red dots denote viewpoints that are associated with self-defined locations. Top right: The spatial extent (semi-transparent red portion) visually accessible from the Ant House interacts with and is limited by visual barriers (line segments connected by black nodes). Bottom right: Viewpoint at the Fish station has a larger spatial extent being visually accessible, resulting in a larger geographic scale than the viewpoint at the Ant House