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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* tricorn.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/24 16:00:46 by cacharle #+# #+# */
/* Updated: 2020/02/27 12:24:35 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "fractol.h"
#define TRICORN_ESCAPE_RADIUS_SQUARED 4.0
int tricorn(t_state *state, t_complex c)
{
int n;
t_complex z;
t_complex z_square;
double tmp;
(void)state;
z = c;
n = -1;
while (++n < state->iterations)
{
z_square.i = z.i * z.i;
z_square.r = z.r * z.r;
if (z_square.r + z_square.i > TRICORN_ESCAPE_RADIUS_SQUARED)
break;
tmp = z_square.r - z_square.i + z.r;
z.i = -2.0 * z.r * z.i + c.i;
z.r = tmp;
}
return (n);
}
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