Any ideas/comments on this? (I knew I shouldn't sent the email out on Friday)
Hi all,
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Some background first:
I've upgraded my code from 2.4 to 2.8.
I have a queue of ParticleEffects contained by osg::PositionAttitudeTransform's
that get moved around. So whoever was the last effect to move, gets put into a
new position and reset to look as if it's a totally new effect.
An alternative method would be to delete the oldest when adding a new one and a
preset limit is reached. However, this is what I did to just reuse the
previously created effect.
If you don't use LocalParticleSystem, you'll get a smoke trail (from the old to
new pos) for smoke (which in this case we don't want) or a fire trail or
whatever.
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This issue I've noticed in 2.8:
When you use a LocalParticleSystem on an Effect in 2.8, the Effects just sit at
the origin (which is not what happened before). It seems to happen due to a
change in ModularEmitter.cpp. It seems the code was changed to support
Earth-centric coordinate system. The full comment on the change is:
>From Tim Moore, "his submission fixes a bug when the ModularEmitter and
>ParticleSystem are in different frames of reference. Specifically, it supports
>the case where the ParticleSystem is not in the world frame. One way this can
>come up is if your world coordinate system is Earth-centric; the float
>coordinates of particles don't have enough precision to avoid terrible jitter
>and other rendering artifacts, so it's convenient to root the particle systems
>in a local Z-up coordinate system that gets moved around from time to time."
So, is there a way to get ParticleEffects with setUseLocalParticleSystem(true)
to behave like the use too?
Thanks,
Mike Dorsett
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