Re: [Flightgear-devel] Call for Help (SoundSystem listener orientation)

[Tim M. <ti...@re...>]

On 11/01/2009 06:28 PM, Erik Hofman wrote:
> 
> At this time I've tried about everything to get the listener orientation 
> aligned properly. What's needed it converting the ViewOrientation matrix 
> (quaternation) and/or ViewOrientationOffset matrix (quaternation) to 
> align with OpenGL and get the look-at and look-up vector from it.
> the look-at vector should match the OpenGL view vector and the up-vector 
> is the perpendicular vector pointing out of the top of the listeners head.
> 
> It looks like I'm really close (for testing I've commented out some 
> position offset and velocity vector code) but to me it's not yet 100% 
> right, as if I'm missing something. I would really appreciate it if 
> someone who knows his way around this could take a look at 
> SGSoundManager::update_pos_and_orientation() in 
> SimGear/simgear/sound/soundmgr_openal.cxx
> View related values are set in FlightGear/src/Main/viewmgr.cxx: both 
> recalcLookFrom() anf recalcLookAt()

I'm sorry I haven't looked in on this sooner. I've started to look at this
and will have a (hopefully) coherent observation in the morning.

Tim