Thanks, yes, they are a bit tidy.   I think I would change my "actave," or
attractive point, to be different for each and to travel with a z component
that changes as a function of time. something like,

#declare actave=<-460+time*constant,100, 10*sin(2*pi*(time/totaltime*4 +
particlenumber/#particles) >;

Rune wrote:

> "Greg M. Johnson" wrote:
> > As luck would have it, the flocking concept I was already
> > working on may prove a nice fit with the IRTC topic of
> > Alien Invasion.
> >
> > I tried all kinds of exotic algorithms. Nothing looked better than a
> > simple repulsion from the surface at several points ahead along the
> > current velocity of the particle.
>
> Very nice!
>
> I think it might look better with some more motion though. They might look
> more alive and more alien if they flew in and out amongst each other.
>
> A suggestion: Make each boid attracted to both boid N+1 AND boid N-1. And
> make the attraction very weak. That way you would probably get a more
> "alive" formation, but still avoid a visible chain formation.
>
> Greetings,
>
> Rune
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