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fractal.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* fractal.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rriyas <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/06/17 17:05:35 by rriyas #+# #+# */
/* Updated: 2022/06/28 14:22:26 by rriyas ### ########.fr */
/* */
/* ************************************************************************** */
#include "fractal.h"
int col_picker(double continuous_index, int col)
{
int r;
int g;
int b;
r = (unsigned char)(sin(0.069 * continuous_index + 4) * 230 + col);
g = (unsigned char)(sin(0.069 * continuous_index + 2) * 230 + col);
b = (unsigned char)(sin(0.069 * continuous_index + 1) * 230 + col);
return ((r << 16) | (g << 8) | b);
}
void plot_mandel(t_render *data, t_coord *cart, t_coord pixel, int col)
{
double x;
double y;
double temp;
int iter;
double cont;
iter = 0;
x = 0;
y = 0;
while (x * x + y * y <= 4 && iter < data->img_data.iter)
{
temp = x * x - y * y + cart->x;
y = 2 * x * y + cart->y;
x = temp;
iter++;
}
cont = iter + 10 - (log(2)
/ fabs(sqrt(cart->x * cart->x + cart->y * cart->y))) / log (2);
col = col_picker(cont, col);
if (iter < data->img_data.iter)
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, col);
else
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, 0x0);
}
void plot_burning_ship(t_render *data, t_coord *cart, t_coord pixel, int col)
{
double temp;
int iter;
double x;
double y;
double cont;
iter = 0;
x = 0;
y = 0;
while (x * x + y * y <= 4 && iter < data->img_data.iter)
{
temp = x * x - y * y + cart->x;
y = fabs(2 * x * y) + cart->y;
x = temp;
iter++;
}
cont = iter + 10 - (log(2)
/ fabs(sqrt(cart->x * cart->x + cart->y * cart->y))) / log (2);
col = col_picker(cont, col);
if (iter < data->img_data.iter)
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, col);
else
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, 0x0);
}
void plot_julia(t_render *data, t_coord *cart, t_coord pixel, int col)
{
double temp;
int iter;
double mx;
double my;
int max_iter;
mx = data->c.x;
my = data->c.y;
max_iter = data->img_data.iter;
iter = 0;
while (cart->x * cart->x + cart->y * cart->y <= 4 && iter < max_iter)
{
temp = cart->x * cart->x - cart->y * cart->y + mx;
cart->y = 2 * cart->x * cart->y + my;
cart->x = temp;
iter++;
}
temp = iter + 10 - (log(2)
/ fabs(sqrt(cart->x * cart->x + cart->y * cart->y))) / log (2);
col = col_picker(temp, col);
if (iter < data->img_data.iter)
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, col);
else
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, 0x0);
}
void plot_newton(t_render *data, t_coord *cart, t_coord pixel, int col)
{
double temp;
int iter;
double old_x;
double old_y;
double cont;
iter = 0;
temp = 1.0f;
while (temp > 0.001 && iter < data->img_data.iter)
{
old_x = cart->x;
old_y = cart->y;
temp = (cart->x * cart->x + cart->y * cart->y)
* (cart->x * cart->x + cart->y * cart->y);
cart->x = (2 * cart->x * temp + cart->x * cart->x - cart->y * cart->y)
/ (3.0 * temp);
cart->y = (2 * cart->y * (temp - old_x)) / (3.0 * temp);
temp = (cart->x - old_x) * (cart->x - old_x)
+ (cart->y - old_y) * (cart->y - old_y);
iter++;
}
cont = iter + 10 - (log(2)
/ fabs(sqrt(cart->x * cart->x + cart->y * cart->y))) / log (2);
col = col_picker(cont, col);
my_mlx_pixel_put(&data->img_data, pixel.x, pixel.y, col);
}