For example, the header record of a VRML file or a single value of a multi-valued field . 3.23 environmental sensor Environmental sensor nodes generate events based on the location of the viewpoint in the world or in relation to objects in the world. The TimeSensor node generates events at regular intervals in time . A node of type Collision, ProximitySensor, TimeSensor, or VisibilitySensor. A message sent from one node to another as defined by a route .
Events signal external stimuli, changes to field values, and interactions between nodes.
An event consists of a time stamp and a field value. 3.25 event cascade A sequence of events initiated by a script or sensor event and propagated from node to node along one or more routes . All events in an event cascade are considered to have occurred simultaneously. 3.26 eventIn A logical receptor attached to a node which receives events . A logical output terminal attached to a node from which events are sent.