To implement these choices, we edit a few more lines in bball_init() so that the code looks like:
int n_param=2; /* dim of parameter space */ static char *parameter_names[]={"alpha","gamma"}; /* list of param names */ static double parameters[]={0.8,10.}; /* initial parameter values */ static double parameter_min[]={0.,0.}; /* default param min for display */ static double parameter_max[]={1.,25.}; /* default param max for display */