RE: [Plib-users] Particle System

[<s4...@sp...>]

> My guess is that you are including the current position of
> the aircraft not a copy of the aircraft position at the time that
> the particle was created in the SceneGraph hence as the aircraft
> moves and the aircraft matrix is updated the particles move.
>
> i.e. the particle system needs to be in its own subgraph below the
> scenegraph root *not* below the aircaft in the scenegraph.
>
> HTH
>
> Norman

I think that you have understand this: I create a single particleSystem
that doesn't move and, after a while, it disappears... but I wouldn't
create such a particle system. I would create something like the smoke
trail ot the Frecce Tricolori (http://www.sky-flash.com/frecce.htm)
so I need a particle system that follows the airplane but that
the particles, when created, doesn't move. This is one way. The other
is to create a particles system at every cycle, but this could be a
performance dropper (or not...). Maybe you could help me to decide which
solution I've to choose (the second seems very simple ...).


Luca
PS:
don't warry if I misunderstand you, my english isn't very good :-) ... and
the first phrase is a little confused.