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/******************************************************
*
* zexy - implementation file
*
* copyleft (c) IOhannes m zmölnig
*
* 1999:forum::für::umläute:2004
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2
*
******************************************************/
/* wrap floats between to limits */
#include "zexy.h"
static t_class *wrap_class;
typedef struct _wrap {
t_object x_obj;
t_float f_upper, f_lower;
} t_wrap;
static void wrap_float(t_wrap *x, t_float f)
{
if (x->f_lower==x->f_upper)
outlet_float(x->x_obj.ob_outlet, x->f_lower);
else {
t_float modulo = fmod((f-x->f_lower),(x->f_upper-x->f_lower));
if (modulo<0)modulo+=(x->f_upper-x->f_lower);
outlet_float(x->x_obj.ob_outlet, x->f_lower+modulo);
}
}
static void wrap_set(t_wrap *x, t_symbol *s, int argc, t_atom *argv){
t_float f1, f2;
ZEXY_USEVAR(s);
switch (argc){
case 0:
f1=0.0;
f2=1.0;
break;
case 1:
f1=0.0;
f2 = atom_getfloat(argv);
break;
default:
f1 = atom_getfloat(argv);
f2 = atom_getfloat(argv+1);
}
x->f_lower=(f1<f2)?f1:f2;
x->f_upper=(f1>f2)?f1:f2;
}
static void *wrap_new(t_symbol *s, int argc, t_atom*argv)
{
t_wrap *x = (t_wrap *)pd_new(wrap_class);
wrap_set(x, s, argc, argv);
outlet_new(&x->x_obj, &s_float);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("set"));
return (x);
}
static void wrap_help(t_wrap*x)
{
post("\n%c wrap\t\t:: wrap a float between to boundaries", HEARTSYMBOL);
}
void wrap_setup(void) {
wrap_class = class_new(gensym("wrap"),
(t_newmethod)wrap_new,
0, sizeof(t_wrap),
CLASS_DEFAULT, A_GIMME, A_NULL);
class_addfloat (wrap_class, wrap_float);
class_addmethod(wrap_class, (t_method)wrap_set, gensym("set"), A_GIMME, 0);
class_addmethod(wrap_class, (t_method)wrap_help, gensym("help"), A_NULL);
class_sethelpsymbol(wrap_class, gensym("zexy/wrap"));
zexy_register("wrap");
}
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