42_INT_04_fdf/srcs/fdf.c

#include "fdf.h"

t_map	*init_map(void);
int		print_keycode(int keycode);
int		shut_down(t_map *map);
void	draw_pixel(t_map *map, int x, int y, int color);
int		keypress(int keycode, t_map *map);
void	rotation_state(t_map *map);

void	draw_image(t_map *map)
{
	int	x;
	int	y;

	y = 0;
	while (y < map->img_size_y)
	{
		x = 0;
		while ((x * map->img_bpp / 8) < map->img_sizel)
		{
			draw_pixel(map, x, y, 0xffffff);
			x += 4;
		}
		y += 4;
	}
	// put image on screen
	mlx_put_image_to_window(map->mlx_ptr, map->win_ptr, map->img_ptr, 0, 0);
	// put rotation on screen
	rotation_state(map);
}

int		main(int ac, char **av)
{
	t_map	*map;

	(void)av;
	(void)ac;
	map = init_map();

	// receive a keypress event
	mlx_hook(map->win_ptr, 2, 1L << 0, keypress, map);
	// receive event when clicking the button to close the window
	mlx_hook(map->win_ptr, 17, 1L << 17, shut_down, map);
	// run window when no events occurs
	mlx_loop(map->mlx_ptr);
	return (0);
}

int		keypress(int keycode, t_map *map)
{
	if (keycode == ESCAPE)
		shut_down(map);
	else if (keycode == LEFT)
		(map->rot_x) -= 1;
	else if (keycode == RIGHT)
		(map->rot_x) += 1;
	else if (keycode == UP)
		(map->rot_y) += 1;
	else if (keycode == DOWN)
		(map->rot_y) -= 1;
	else
		print_keycode(keycode);
	// draw image
	draw_image(map);
	return (0);
}

int		print_keycode(int keycode)
{
	ft_putnbr(keycode);
	ft_putchar(' ');
	return(0);
}

void	draw_pixel(t_map *map, int x, int y, int color)
{
	int position;

	position = y * map->img_sizel + x * map->img_bpp / 8;
	*(unsigned int*)(map->img_addr + position) = color;
}

void	rotation_state(t_map *map)
{
	char	*position;
	int		x;
	int		y;

	x = map->img_size_x - 10;
	y = map->img_size_y - 10;
	position = ft_strjoin(ft_itoa(map->rot_x), " | ");
	position = ft_strjoin(position, ft_itoa(map->rot_y));
	x -= ft_strlen(position) * 6;
	mlx_string_put(map->mlx_ptr, map->win_ptr, x, y, 0xffffff, position);
}

t_map	*init_map(void)
{
	t_map	*map;

	map = malloc(sizeof(t_map));
	// size window
	map->win_size_x = 500;
	map->win_size_y = 500;
	// size image
	map->img_size_x = map->win_size_x;
	map->img_size_y = map->win_size_y;
	// view rotation
	map->rot_x = 0;
	map->rot_y = 0;
	// init connexion to server
	map->mlx_ptr = mlx_init();
	// create the window
	map->win_ptr = mlx_new_window(map->mlx_ptr, map->win_size_x, map->win_size_y, "test");
	// create image
	map->img_ptr = mlx_new_image(map->mlx_ptr, map->img_size_x, map->img_size_y);
	map->img_addr = mlx_get_data_addr(map->img_ptr, &(map->img_bpp), &(map->img_sizel), &(map->img_endian));
	// draw image
	draw_image(map);
	return (map);
}

int		shut_down(t_map *map)
{
	mlx_destroy_window(map->mlx_ptr, map->win_ptr);
	exit(0);
	free(map);
	return (0);
}

/*
** w forward	119
** a left		97
** s backward	115
** d right		100
** <			65361
** >			65363
** v			65364
** ^			65362
** esc			65307
**
**
**
**
**
**
**
**
**
**		// x_event |   x_mask | action
**		//       2 |  1L << 0 | key press
**		//       3 |  1L << 1 | key release
**		//       4 |          | mouse press
**		//       5 |          | mouse release
**		//       6 |          | mouse move
**		//      12 |          | expose event
**		//      17 | 1L << 17 | x button press (red button)
**		//         |          |
**
**
**
** FONCTIONS EXTERNES AUTORISEES :
** . open
** . close
** . read
** . write
** . malloc
** . free
** . perror
** . strerror
** . exit
** . math lib :
**    -lm         // needed at compilation to link the lib :
**                   gcc foo.c -o foo -lm
**    man
**    man 3 math
** . minilibx :
**    minilibx_opengl.tgz
**    minilibx_mms_20200219_beta.tgz
**    // to open an archive.tgz :
**       gzip -d archive.tgz     --> turn it into archive.tar
**       tar -xf archive.tar     --> un-archive it
**    // how to add a man directory to the manual :
**       . cp man/man1 /usr/local/share/man/man1
**         (create man1 if necessary)
**       . mandb
**   // i didn't use any of both library above but the one for linux :
**      https://github.com/42Paris/minilibx-linux
**      there are pbm with their man pages
*/