diff options
Diffstat (limited to 'src/ft_floor_cast.c')
| -rw-r--r-- | src/ft_floor_cast.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/ft_floor_cast.c b/src/ft_floor_cast.c new file mode 100644 index 0000000..c82163a --- /dev/null +++ b/src/ft_floor_cast.c @@ -0,0 +1,55 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* ft_raycasting.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/02/14 17:22:57 by rbousset #+# #+# */ +/* Updated: 2020/02/14 17:23:42 by rbousset ### ########lyon.fr */ +/* */ +/* ************************************************************************** */ + +#include <cub3d.h> +#include <stdint.h> + +static void + ft_initray(uint16_t y, t_ray *rl, t_player *pl, t_cub *cl) +{ + int16_t p; + + rl->x_ray_dir = pl->dir_x - pl->plane_x; + rl->y_ray_dir = pl->dir_y - pl->plane_y; + rl->x_ray_dir_bis = pl->dir_x + pl->plane_x; + rl->y_ray_dir_bis = pl->dir_y + pl->plane_y; + p = y - cl->wlist.y_size / 2; + pl->pos_z = 0.5 * cl->wlist.y_size; + rl->row_dist = pl->pos_z / p; + cl->mlist.x_floor_step = rl->row_dist * + (rl->x_ray_dir_bis - rl->x_ray_dir) / cl->wlist.x_size; + cl->mlist.y_floor_step = rl->row_dist * + (rl->y_ray_dir_bis - rl->y_ray_dir) / cl->wlist.x_size; + rl->floor_x = pl->pos_x + rl->row_dist * rl->x_ray_dir; + rl->floor_y = pl->pos_y + rl->row_dist * rl->y_ray_dir; +} + +void + ft_floor_cast(t_cub *cl) +{ + uint16_t y; + uint16_t x; + + y = 0; + while (y < cl->wlist.y_size) + { + ft_initray(y, &cl->rlist, &cl->plist, cl); + x = 1; + while (x < cl->wlist.x_size) + { + cl->rlist.ceil_x = (int16_t)cl->rlist.floor_x; + cl->rlist.ceil_y = (int16_t)cl->rlist.floor_y; + x++; + } + y++; + } +} |