On Jan 26, 2009, at 10:09 AM, Ben Webb wrote:
I think I had only replied to Keren before. There is an example which does more or less what she wanted to do (in simple examples).Keren Lasker wrote:but do you mean to keep each gravity center particle at the center of mass of its CHILDREN particles. ?The gravity center ScoreState simply keeps a list of particles and positions itself at the center of gravity of those particles. Whether you think of the particles in that list as children or parents is a matter of your viewpoint, I suppose.