SoEngineOuput is the class for all engine output fields. There is no public constructor routine for this class. Only the engine classes create instances of
SoEngineOutput\.
Each engine creates one or more engine outputs. The type
of the output is documented in the engine reference pages. There is also an
SoEngineOutput method for querying the connection type.
The application can at any time enable or disable the engine outputs. By default
the engine outputs are enabled.