Re: [Flightgear-bugs] Issue 421 in flightgear-bugs: Simulation time vs real-time is mixed up

[<fli...@go...>]

Comment #9 on issue 421 by curtol...@gmail.com: Simulation time vs  
real-time is mixed up
http://code.google.com/p/flightgear-bugs/issues/detail?id=421

Passing a correct "dt" to the vsi math "trivially" fixes the time  
accelerate problem with the vsi.  However, the autopilot issues are not as  
simple as changing dt as I attempted to explain in my earlier comments.

Also, even if the autopilot is run at the same rate and dt as the fdm, if  
the autopilot outputs aren't being copied over to the fdm for each  
iteration (the fdm can run several iterations per graphics frame) then this  
approach really accomplishes nothing towards making the autopilot work  
better with time acceleration.

In other words, if the fdm runs "n" iterations with the same control  
inputs, it doesn't accomplish anything to run "n" iterations of the  
autopilot interleaved with the fdm.  This only would improve things if the  
fdm inputs were refreshed every iteration (not just every graphics frame.)