Using Emesary Global Transmitter the following events are notified
* Frame Begin
* Frame End
* Mainloop started
* Mainloop stopped
This integrates with the background threaded Nasal Garbage collection (simgear:nasal/cppbind/NasalEmesaryInterface.hxx) and is also controlled by the properties as follows
* /sim/nasal-gc-threaded (true) - use background threaded GC
* /sim/nasal-gc-threaded-wait (false) - at the start of the frame wait for the previous GC thread to complete.
I initially thought that the wait at the start of the frame would be necessary; however in 100 or so hours of flight without the await for completion at the start of frame no threading problems (or any other problems) were shown; so nasal-gc-threaded-wait is defaulted to false which gives a slight boost in performance.
So what this does is to it removes the GC pause of 10-20ms every 4 seconds (test using the F-15). This change doesn't really give much extra performance per frame because normally GC is only performed when needed.
Neither Torsten nor I can recall why we continued to hard-code this,
so make it dynamic for now. When we remember why we hard-code it,
we can add a BigComment from future-James to future-future-James about
why not to do this again :)
This is necessary on macOS where DBus is typically installed using
Homebrew, and hence we need additional linker flags to find the
library. Using the PkgConfig::DBUS imported target handles all this
transparently, but then we need to define an imported target for
Windows to work.
Due to e43fe82094 models in AI scenarios were
being searched down the AI/Aircraft and Aircraft paths, where in fact
they are by default a full path from FGDATA.
This fixes the problem by setting DATA_ONLY as the search order.
Other search orders can be set in the scenario file by setting
the search-order tag to "DATA_ONLY", "PREFER_AI", "PREFER_DATA"
Based on the dew point temperature supplied by FG, JSBSim updates the atmosphere density and computes all the usual parameters (RH, vapor pressure, saturated vapor pressure, etc.)
The mass fraction of water per unit of air mass is capped according to the record high from ISA 1976 standard atmosphere. As a consequence, at very high altitudes, air is always extremely dry (approx. 30 ppm i.e. 30 parts per million) whatever the conditions at sea level.
Fix for https://sourceforge.net/p/flightgear/codetickets/2125/
Previously, selecting a non-pushback parking position from the l
auncher that did not have a ground network resulted in the
aircraft being placed in the center of the airport.
This resolves the problem by creating a default segment simply
moving forward 2m.
According to Pfeffer's report[1] and many other messages on the
Internet, joyGetDevCaps() can return the (so far) undocumented value
165, which some say is JOYERR_PARMS. Since this is a valid return code
for joyGetPosEx() (not joyGetDevCaps()!), handle a few return codes from
that function too, and don't throw an exception when joyGetDevCaps()'s
return value is not one of the documented ones (we simply can't trust
its documentation).
[1] https://sourceforge.net/p/flightgear/mailman/message/36657149/
Since asserts can be compiled as no-ops, throw an exception rather than
doing assert(false), in case the code passed to
joyGetDevCaps_errorString() is not one of the expected values.
Every code path that causes a joystick to report notWorking() should now
have an associated error message logged with class 'input' at level
'debug' or higher.
