[PD] Flock of birds

[Nicolas Montgermont]

Hi list,

Implementing a flock of birds behavior is on my todo list. I think of 
using physical modeling to do that :

- creating birds as oriented masses.
- switching between comportment of each mass separately.
- dynamically linking birds between them using spring/damper links 
depending on the distance and the orientation of each mass.

I keep you aware when I start to write an external on it but I think 
it'll be mostly based on msd2D, already available on the CVS.

Best greetings,

Nicolas