Assertion: visibility polygon | /r/HasProperty | useful
Facets:
value: in robotics
type: LOCATION
value: in video games
type: LOCATION
value: in determining positions
type: TEMPORAL
Source sentences:
text: Visibility polygons are useful in robotics, video games, and in determining positions to locate facilities, such as the best placement of security guards in an art gallery.
text: Visibility polygons are useful in robotics.