I don't know if anyone can supply an answer here, but since
particle-systems are
being developed here, I thought this might be the right place.

My problem is as follows:
I have a particle with given speed and position.
Now, does anyone know how I can calculate a direction into which it
will initially move, in order to cross a certain, given position, with
the
given speed?
And, if there is a way to do that, to find rather quickly if that is
possible with
the given speed, and which would be the lowest speed possible to hit the

position.

I know, it's a lot of physics... ;)

Tim

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