On Wed, Jul 21, 2010 at 9:26 AM, Curtis Olson wrote:
> Hi Vivian,
>
> Thanks for checking out the submodels. Your image illustrates the problem
> really well.
>
> It sounds like this could very well be an issue in translating coordinate
> frames, or possibly it's a kts. to mps conversion issue? I guess I need to
> go hunt around and see if I can find where this is in the code.
>
Just to follow up my own message here. I setup the Rascal 110 which flies
slow and can emit smoke. I set the weather for "stormy monday" which puts
the wind at 70 kts.
What I am observing is that the smoke particles are flowing directly north.
There doesn't seem to be any east component to the smoke particle movement?
That's strange because I've verified that the wind velocity vector is being
computed correctly and sent to the particle system.
There is an #ifdef in particle.cxx ... #ifdef OSG_PARTICLE_FIX, I wonder if
that's somehow related. It get's defined #if SG_OSG_VERSION >= 27004
earlier in particles.cxx
Hmmm, could we be dealing with some sort of OSG bug? Or some difference in
behavior between OSG versions? The OSG_PARTICLE_FIX code is substantially
more complicated than without, but the way the #ifdef structure is setup, it
implies that OSG particles were *broken* in v2.7.4 and the fix applies to
any versions after that? Is that the case???
Curt.
--
Curtis Olson: http://baron.flightgear.org/~curt/
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