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#include <cub3d.h>
#include <math.h>
static void
ft_detection_init_y(t_cub *cl)
{
cl->rlist.y_delta_dist = sqrt(1 + (cl->rlist.x_ray_dir *
cl->rlist.x_ray_dir) / (cl->rlist.y_ray_dir *
cl->rlist.y_ray_dir));
if (cl->rlist.y_ray_dir < 0)
{
cl->y_step = -1;
cl->rlist.y_side_dist = (cl->rlist.y_ray_pos -
cl->rlist.sqy) * cl->rlist.y_delta_dist;
}
else
{
cl->y_step = 1;
cl->rlist.y_side_dist = (cl->rlist.sqy + 1.0 -
cl->rlist.y_ray_pos) * cl->rlist.y_delta_dist;
}
}
static void
ft_detection_init_x(t_cub *cl)
{
cl->rlist.x_delta_dist = sqrt(1 + (cl->rlist.y_ray_dir *
cl->rlist.y_ray_dir) / (cl->rlist.x_ray_dir *
cl->rlist.x_ray_dir));
if (cl->rlist.x_ray_dir < 0)
{
cl->x_step = -1;
cl->rlist.x_side_dist = (cl->rlist.x_ray_pos -
cl->rlist.sqx) * cl->rlist.x_delta_dist;
}
else
{
cl->x_step = 1;
cl->rlist.x_side_dist = (cl->rlist.sqx + 1.0 -
cl->rlist.x_ray_pos) * cl->rlist.x_delta_dist;
}
ft_detection_init_y(cl);
}
void
ft_detect(t_cub *cl)
{
ft_detection_init_x(cl);
cl->rlist.hit = 0;
while (cl->rlist.hit == 0)
{
if (cl->rlist.x_side_dist < cl->rlist.y_side_dist)
{
cl->rlist.x_side_dist += cl->rlist.x_delta_dist;
cl->rlist.sqx += cl->x_step;
cl->rlist.side = 0;
}
else
{
cl->rlist.y_side_dist += cl->rlist.y_delta_dist;
cl->rlist.sqy += cl->y_step;
cl->rlist.side = 1;
}
if (cl->map[cl->rlist.sqx][cl->rlist.sqy] == '1')
cl->rlist.hit = 1;
}
}
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