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event_func.c
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event_func.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* event_func.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: nkiampav <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/09/02 08:44:05 by nkiampav #+# #+# */
/* Updated: 2024/09/02 08:44:06 by nkiampav ### ########.fr */
/* */
/* ************************************************************************** */
#include "fractol.h"
void close_window(int exit_code, t_fractol *f)
{
if (!f)
exit(exit_code);
if (f->palette)
free(f->palette);
if (f->img_ptr)
mlx_destroy_image(f->mlx_ptr, f->img_ptr);
if (f->win_ptr && f->mlx_ptr)
mlx_destroy_window(f->mlx_ptr, f->win_ptr);
if (f->mlx_ptr)
{
mlx_loop_end(f->mlx_ptr);
mlx_destroy_display(f->mlx_ptr);
free(f->mlx_ptr);
}
exit(exit_code);
}
int erase_fractol(t_fractol *f)
{
close_window(0, f);
return (0);
}
static void zoom(t_fractol *f, double zoom_scale)
{
double center_re;
double center_im;
double width_re;
double height_im;
center_re = (f->min_re + f->max_re) / 2;
center_im = (f->min_im + f->max_im) / 2;
width_re = f->max_re - f->min_re;
height_im = f->max_im - f->min_im;
f->min_re = center_re - (width_re * zoom_scale) / 2;
f->max_re = center_re + (width_re * zoom_scale) / 2;
f->min_im = center_im - (height_im * zoom_scale) / 2;
f->max_im = center_im + (height_im * zoom_scale) / 2;
}
static void relocate(t_fractol *f, double dst, char dir)
{
double center_re;
double center_im;
center_re = f->max_re - f->min_re;
center_im = f->max_im - f->min_im;
if (dir == 'R')
{
f->min_re += center_re * dst;
f->max_re += center_re * dst;
}
else if (dir == 'L')
{
f->min_re -= center_re * dst;
f->max_re -= center_re * dst;
}
else if (dir == 'D')
{
f->min_im -= center_im * dst;
f->max_im -= center_im * dst;
}
else if (dir == 'U')
{
f->min_im += center_im * dst;
f->max_im += center_im * dst;
}
}
int mouse_hook(int key, int x, int y, t_fractol *f)
{
if (key == MOUSE_WHEEL_UP)
{
zoom(f, 0.5);
x = x - WIDTH / 2;
y = y - HEIGHT / 2;
if (x < 0)
relocate(f, (double)(-x) / WIDTH, 'L');
else if (x > 0)
relocate(f, (double)x / WIDTH, 'R');
if (y < 0)
relocate(f, (double)(-y) / HEIGHT, 'U');
else if (y > 0)
relocate (f, (double)y / HEIGHT, 'D');
}
else if (key == MOUSE_WHEEL_DOWN)
zoom(f, 2);
else
return (0);
draw_fractal(f);
return (0);
}