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Events and Routes allow to make the VRML world dynamic such as clicking on a shape with a mouse can turn on a light, trigger a sound, or start up a machine.
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To implement this, the events should be wired. One of them (eventOout) produces the event and the other one (eventIn) consumes it by implementing the necessary operation in the world.
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Events are fields within the node. The sender and receiver nodes should has the same field type.
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The connection between the node generating the event and the node receiving the event is called a Route.
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