Vrml 2.0 Animation Concepts, Part 1
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New concept in VRML animation is that it can be event-driven. Objects
may be moving in response to other objects, or to user interaction, and
can have their own TimeSensors.
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Animation can be thought of as a triggering and logic unit (sensors and
optional scripts), a TimeSensor, and a set of interpolators and objects
driven from the TimeSensor.
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Many nodes contain events-indications something has happened. There are
two kinds-incoming and outgoing. Outgoing events from one node may be
wired or routed to the incoming event of another node. (A
touch sensor can route touchTime to the startTime of a launching space
ship, and to the sound of the rockets.)
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Unlike film or video, animation need not be presented as a linear
story. The author needs to consider the action and reaction of all the
objects and participants in the scene.