Hi,

I am implementing my own smoke trail using osgParticle.  I have it just about 
where I want it, except for one thing:  When I am emitting the smoke trail from 
a fast moving object, the emitter seems to "lag behind" the object.  At some 
point, the faster the object moves, the further the emitter seems to be.  When 
moving slowly, it looks perfect.

I am using an osgParticle::SegmentPlacer.  The segment ends are made up of the 
current position of the object and the previous position of the object.  My 
thought is that if I distributed particles over the segment, it would fill in 
given a sufficient number of particles generated.  I set up my emitter's 
counter rate range to a high and low both of 4096 particles (i.e. constant, no 
rate.)  Even with this, my particles are showing up well behind my object when 
it is moving quickly.  (The distance seems to be about equal to the distance 
the object traveled in a single frame.)

Any thoughts or ideas would be appreciated!

Thank you!

Cheers,
John

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http://forum.openscenegraph.org/viewtopic.php?p=60474#60474





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