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Howto:Extend Nasal

44 bytes added, 17:44, 27 June 2012
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A standard interface for mapping C++ classes to Nasal objects
== A standard interface for mapping C++ classes to Nasal objects ==
There's a plan to eventually generalize and unify all those helpers in FGPositioned.cxx and provide them as part of the FGNasalSys class (or some custom abstract base class that C++ classes should implement to expose objects to Nasal), so that they automatically become available to all users of the Nasal subsystem, just by implementing a certain interface.
Looking at the code in NasalPositioned.cxx: [http://gitorious.org/fg/flightgear/blobs/78afdb3c2227e75fc1542b3992dcea26181d98cf/src/Scripting/NasalPositioned.cxx#line139NasalPositioned.cxx]:
The function bodies for these helpers are largely identical:
<syntaxhighlight lang="cpp">
class FGPositioned : public SGReferenced, public FGNasalOOPWrapper FGNasalWrapper { // .... };
</syntaxhighlight>
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