This component defines scripting support.
Script is the
only node defined here, it's like a black box that receives
VRML/X3D events, processes them with some external language,
and sends new VRML/X3D events.
We handle special script protocols compiled: (to link scripts with handlers written in compiled language (ObjectPascal)) and castlescript: (simple scripting language specific to our engine).
TODO: no standard scripting language, like ECMAScript,
is implemented now.
directOutput field of script node
is ignored (
compiled: scripts have always direct access
to whole VRML scene,
castlescript: has never access to VRML nodes).
mustEvaluate is also ignored for now. This is non-optimal but
valid behavior. Our current scripting protocols have no "loading"
overhead (we don't initialize any scripting engine, castlescript: and
compiled: scripts are just tightly built-in the engine) so this doesn't
hurt us in practice.