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#ifdef NT
#include "stdafx.h"
#include <io.h>
#endif
#include "m_pd.h"
#include <stdlib.h>
#include <time.h>
#include "about.h"
/**
* The about object is designed to output a number that is
* "about" the same as its input. A percentage error factor
* gives the deviation.
*/
static t_class *about_class;
/**
* a float causes a number that is within x_err range
* of the input number
*/
static void about_float(t_about *x , t_float f)
{
float errp = (( (float) rand() / (float) RAND_MAX) * ( x->x_err * 2));
float tenp = ((errp - x->x_err)/100) * f;
//float ep = (errp/100) * f;
//float correction = ep - tenp;
//float outf = f + correction;
float outf = f + tenp;
outlet_float( x->x_obj.ob_outlet , outf );
}
/*
* make a new about it takes one parameter - the percentage error
*/
static void *about_new( t_float f )
{
t_about *x = (t_about *)pd_new(about_class);
about_set_err( x , f );
// make us some ins and outs
outlet_new(&x->x_obj, gensym("float"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("error"));
return (x);
}
static void about_free(t_about *x)
{
// nothing doing here for now
}
/**
* set the error factor
*/
static void about_set_err( t_about *x, t_float f )
{
x->x_err = f;
}
/**
* make a new one and setup all of our messages
*/
void about_setup(void)
{
srand( (unsigned) time( NULL ) );
about_class = class_new(gensym("about"), (t_newmethod)about_new,
(t_method)about_free, sizeof(t_about), 0, A_DEFFLOAT , 0);
class_addfloat( about_class, about_float );
class_addmethod(about_class, (t_method)about_set_err, gensym("error" ), A_FLOAT, 0);
}
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