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Implementing VNAV support in FlightGear: Difference between revisions
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Implementing VNAV support in FlightGear (view source)
Revision as of 23:37, 6 December 2013
, 6 December 2013→Getting started
| Line 200: | Line 200: | ||
It is foreseeable that we may need to modify and extend JSBSim, i.e. to add new components - unfortunately, the "Extending JSBSim" chapter in the JSBSim reference manual is still just a placeholder without any content, so here are some stubs to help lower the barrier to entry when extending JSBSim. | It is foreseeable that we may need to modify and extend JSBSim, i.e. to add new components - unfortunately, the "Extending JSBSim" chapter in the JSBSim reference manual is still just a placeholder without any content, so here are some stubs to help lower the barrier to entry when extending JSBSim. | ||
=== Standalone JSBSim === | |||
The standalone JSBSim interpreter is implemented in src/JSBSim.cpp - all options processing takes place in '''bool options(int count, char **arg)''', this is also the place where you can easily add new startup options, see for example: | |||
<syntaxhighlight lang="diff"> | |||
diff --git a/src/JSBSim.cpp b/src/JSBSim.cpp | |||
index 2a8b225..0dfa52d 100644 | |||
--- a/src/JSBSim.cpp | |||
+++ b/src/JSBSim.cpp | |||
@@ -680,8 +680,10 @@ bool options(int count, char **arg) | |||
exit(1); | |||
} | |||
- } | |||
- else //Unknown keyword so print the help file, the bad keyword and abort | |||
+ } else if (keyword == "--new-option") { | |||
+ std::cerr << "--new-option= works (value is:"<< value << ")- but not yet implemented-exiting!" << std::endl; | |||
+ exit(1); | |||
+ } else //Unknown keyword so print the help file, the bad keyword and abort | |||
{ | |||
PrintHelp(); | |||
cerr << "The argument \"" << keyword << "\" cannot be interpreted as a file name or option." << endl; | |||
@@ -735,8 +737,8 @@ void PrintHelp(void) | |||
cout << " --simulation-rate=<rate (double)> specifies the sim dT time or frequency" << endl; | |||
cout << " If rate specified is less than 1, it is interpreted as" << endl; | |||
cout << " a time step size, otherwise it is assumed to be a rate in Hertz." << endl; | |||
- cout << " --end=<time (double)> specifies the sim end time" << endl << endl; | |||
- | |||
+ cout << " --end=<time (double)> specifies the sim end time" << endl; | |||
+ cout << " --new-option=(value) a new JSBSim option" << endl << endl; | |||
cout << " NOTE: There can be no spaces around the = sign when" << endl; | |||
cout << " an option is followed by a filename" << endl << endl; | |||
} | |||
</syntaxhighlight> | |||
=== Adding new Telnet commands === | === Adding new Telnet commands === | ||