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util.Random problems (?)

Svend Rost
Ranch Hand

Joined: Oct 23, 2002
Posts: 904
Hi..

Im fooling around with a small particle engine for J2ME, and
for each particle (in the particle flock) I need to generate
a beginning x and y value, and an "update/speed vector" (xi,yi) with the
help of Random.

Emperical tests shows, that the particles tend to flock together.
I suspect, that util.Random "reuses" the generated values..

does anyone have any info on the above?

In general about the engine:

loop thru' the flock of particles:
if particle p is active -> p.update
else reset p

particle.update()
x= x + xi
y= y + yi

particle.reset()
sets the x,y,xi and yi values with random.nextInt() % 3

/Svend Rost
 
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subject: util.Random problems (?)