/*
This is what moves our fireflies towards the most attractive flies.
*/
static void
move_fflies(ffly_population *pop, const ffly_population *pop_old, obj_func f,
double alpha, const double gamma, const double mins[], const double maxs[])
{
size_t i = 0, j = 0, k = 0;
int moved = 0;
const size_t nflies = pop->nfflies;
const size_t nparams = pop->nparams;
for (i=0; i < nflies; i++)
{
for (j = 0; j < nflies; j++)
{
moved |= move_fly(&pop->flies[i], &pop_old->flies[j], nparams, alpha, gamma, mins, maxs);
}
/* we never moved, so move a lil bit randomly*/
if (!moved)
{
double val = 0.0;
for (k = 0; k < nparams; k++)
{
val = pop->flies[i].params[k] + (alpha * (drand48() - 0.5));
pop->flies[i].params[k] = (val < mins[k]) ? mins[k] : (val > maxs[k]) ? maxs[k] : val;
}
}
moved = 0;
//re-evaluate our current brightness
pop->flies[i].val = (*f)(&pop->flies[i], nparams);
}
};
void
draw_eyes(ModeInfo * mi)
{
int i;
EyeScrInfo *ep;
if (eye_info == NULL)
return;
ep = &eye_info[MI_SCREEN(mi)];
if (ep->flypix == None)
return;
MI_IS_DRAWN(mi) = True;
move_fly(mi, &(ep->fly));
ep->time++;
for (i = 0; i < ep->num_eyes; i++) {
paint_eyes(mi, &(ep->eyes[i]), &(ep->fly), ep->eyes, ep->num_eyes);
}
paint_fly(mi, &(ep->fly));
}