File: mandelbrot.c

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#include "ext13.h"
#include "m_pd.h"
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#ifndef _WIN32
#include <unistd.h>
#endif

#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif

/* -------------------------- mandelbrot ------------------------------ */
static t_class *mandelbrot_class;

typedef struct _mandelbrot
{
    t_object x_obj;
    t_float  cr;
    t_float  ci;
    t_float  k;
    t_float  result;
} t_mandelbrot;


static void *mandelbrot_new(t_floatarg f)
{
    t_mandelbrot *x = (t_mandelbrot *)pd_new(mandelbrot_class);
    x->k=f;
    if (! x->k) {x->k=100;}
    floatinlet_new(&x->x_obj, &x->ci);
    floatinlet_new(&x->x_obj, &x->k);
    outlet_new(&x->x_obj,0);
    return (x);
}



static void mandelbrot_bang(t_mandelbrot *x)
{
   outlet_float(x->x_obj.ob_outlet,x->result); 
}

static void mandelbrot_float(t_mandelbrot *x, t_float f)
{ 
  int i = -2;
  t_float zr = 0;
  t_float zi = 0;
  t_float z2r = 0;
  t_float z2i = 0;
  x->cr = f;
  if ((x->cr < 0 ) && ( x->cr > -0.5) && (x->ci * x->ci < 0.25)){
    x->result = x->k;
  }else{
    while (((z2r + z2i) < 4 ) && (++i < x->k )) {
      z2r = zr * zr;
      z2i = zi * zi;
      zi = 2 * zr * zi + x->ci;
      zr = z2r - z2i + x->cr;
    }
    x->result = i;
  }  
  outlet_float(x->x_obj.ob_outlet,x->result);
}



void mandelbrot_setup(void)
{
    mandelbrot_class = class_new(gensym("mandelbrot"), (t_newmethod)mandelbrot_new, 0,
    	sizeof(t_mandelbrot), 0, A_DEFFLOAT, 0);
    class_addbang(mandelbrot_class, mandelbrot_bang);
    class_addfloat(mandelbrot_class, mandelbrot_float);        
/*    class_addfloat(mandelbrot_class; mandelbrot_float);*/
}