On Fri, Apr 10, 2009 at 02:17, Anne Archibald <peridot.face...@gmail.com> wrote: > 2009/4/10 Ian Mallett <geometr...@gmail.com>: > >> The vectors are used to "jitter" each particle's initial speed, so that the >> particles go in different directions instead of moving all as one. Using >> the unit vector causes the particles to make the smooth parabolic shape. >> The jitter vectors much then be of a random length, so that the particles go >> in all different directions at all different speeds, instead of just all in >> different directions. > > Why not just skip the normalization? Then you'll get vectors with > random direction and a natural distribution of lengths. And it'll be > faster than tne unit vectors...
They are going to be forced into a uint8 texture, so they have a limited dynamic range. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
