Re: [Flightgear-devel] Re: [Flightgear-users] Stalls

2006-04-08 Thread Lee Elliott
On Friday 07 April 2006 00:19, Andy Ross wrote:
 [redirecting to flightgear-devel]

 Lee Elliott wrote:
  However, I think this could faked very convincingly already
  in YASim and probably in JSBSim too, simply by playing with
  mass distribution depending on conditions (anyone want to
  give it a go?

 The right way to do it, IMHO, is with the turbulence input, as
 that's what the stall buffet is, after all: turbulence over
 the wings due to flow separation.  Modify the number based on
 the current AoA, probably with a little Nasal (maybe also
 modify the C++ to sum the turbulence input from multiple
 properties so as not to confuse the environment subsystem).

 If audio is required, then this ought to be tied to turbulence
 also, or maybe to instantaneous acceleration changes (a delta
 of more than YYY m/s^2 over the last 0.XX seconds triggers the
 start of a whump sound).

 Andy


For some reason I was under the impression that turbulence didn't 
work with YASim.  As it does then I agree that using turbulence 
would be a better way.

LeeE



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Re: [Flightgear-devel] Re: [Flightgear-users] Stalls

2006-04-06 Thread Josh Babcock
Andy Ross wrote:
 [redirecting to flightgear-devel]

 If audio is required, then this ought to be tied to turbulence also,
 or maybe to instantaneous acceleration changes (a delta of more than
 YYY m/s^2 over the last 0.XX seconds triggers the start of a whump
 sound).


I have been thinking about the audio aspect for a while, though not in
the context of stalls. I think that a broader approach of linking
certain sounds such as rattles and whumps to various types of changes in
 acceleration and some calculated vibration property would add a lot of
realism. This would buy you sound from turbulence, violent maneuvers,
wheel rolling, and wind shear.

Unfortunately I have not had a chance to play with the idea yet, but I
do have some handwritten notes that I would be willing to share. It
would be nice to have a script for all the models to use that would
provide a few easy to link to properties for various mechanical sounds.

Josh


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