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julia.c
56 lines (52 loc) · 1.89 KB
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julia.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* julia.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mwilk <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2015/11/10 19:01:49 by mwilk #+# #+# */
/* Updated: 2015/12/11 22:51:13 by mwilk ### ########.fr */
/* */
/* ************************************************************************** */
#include "fractol.h"
int julia(t_data *d, int x, int y, int max_i)
{
init_julia(d, x, y);
while (++d->u.i < max_i)
{
d->u.zxx = d->u.rz * d->u.rz;
d->u.zyy = d->u.iz * d->u.iz;
d->u.old_rz = d->u.rz;
d->u.old_iz = d->u.iz;
d->u.rz = d->u.zxx - d->u.zyy + d->u.rc;
d->u.iz = 2 * d->u.iz * d->u.old_rz + d->u.ic;
if (d->u.rz == d->u.old_rz && d->u.iz == d->u.old_iz)
d->u.i = max_i - 1;
if (d->u.zxx + d->u.zyy > 4.0)
break ;
}
if (d->u.i >= max_i)
return (0);
return (get_img_color(d, d->u.i, max_i));
}
int julia_special(t_data *d, int x, int y, int max_i)
{
double color;
init_julia(d, x, y);
while (++d->u.i < max_i)
{
d->u.old_rz = d->u.rz;
d->u.rz = d->u.rz * d->u.rz - d->u.iz * d->u.iz;
d->u.iz = 2 * d->u.old_rz * d->u.iz;
d->u.rz += d->u.rc;
d->u.iz += d->u.ic;
if (d->u.rz * d->u.rz + d->u.iz * d->u.iz > 4.0)
break ;
d->u.i++;
}
if (d->u.i >= max_i)
return (0);
color = d->u.i + 1 - log(log(d->u.rz + d->u.iz)) / log(2);
return (get_img_color(d, color, max_i));
}