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FlightGear run levels: Difference between revisions
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Also, many extension functions are specific to certain subsystems, i.e. property tree, sound, FDM, tile manager etc - these would also need to be registered and removed based on the "parent" subsystem's property signals. | Also, many extension functions are specific to certain subsystems, i.e. property tree, sound, FDM, tile manager etc - these would also need to be registered and removed based on the "parent" subsystem's property signals. | ||
== Preventing raw pointer access to subsystems == | |||
Now, the next problem are obviously all "raw" pointer accesses, i.e. code in the form of: | |||
<syntaxhighlight lang="cpp"> | |||
SGPropertyNode *sim = globals->get_props()->getNode("sim/gui", true); | |||
</syntaxhighlight> | |||
or | |||
<syntaxhighlight lang="cpp"> | |||
_route = static_cast<FGRouteMgr*>(globals->get_subsystem("route-manager")); | |||
</syntaxhighlight> | |||
These are problematic because the requested subsystem may not yet be initialized. | |||
So we need to make sure that "optional" subsystems are "clean" in that they are not directly used by any other subsystems. | |||
For starters, it would probably suffice to overload the -> operator for the Globals class and simply allocate the requested subsystems lazily. | |||
== Nasal Scripts == | == Nasal Scripts == | ||