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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_detect.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:22:11 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:23:42 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <cub3d.h>
#include <math.h>
void
ft_detection_init_y(t_cub *cl)
{
cl->rlist.y_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->mlist.y_step = -1;
cl->rlist.y_side_dist = (cl->rlist.x_ray_pos -
cl->rlist.sqx) * cl->rlist.y_delta_dist;
}
else
{
cl->mlist.y_step = 1;
cl->rlist.y_side_dist = (cl->rlist.sqx + 1.0 -
cl->rlist.x_ray_pos) * cl->rlist.y_delta_dist;
}
}
void
ft_detection_init_x(t_cub *cl)
{
cl->rlist.x_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->mlist.x_step = -1;
cl->rlist.x_side_dist = (cl->rlist.y_ray_pos -
cl->rlist.sqy) * cl->rlist.x_delta_dist;
}
else
{
cl->mlist.x_step = 1;
cl->rlist.x_side_dist = (cl->rlist.sqy + 1.0 -
cl->rlist.y_ray_pos) * cl->rlist.x_delta_dist;
}
}
void
ft_detect(t_cub *cl)
{
ft_detection_init_x(cl);
ft_detection_init_y(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.sqy += cl->mlist.x_step;
cl->rlist.side = 0;
}
else
{
cl->rlist.y_side_dist += cl->rlist.y_delta_dist;
cl->rlist.sqx += cl->mlist.y_step;
cl->rlist.side = 1;
}
if (ft_ischarset(FT_CHRST_DETECT,
cl->mlist.map[cl->rlist.sqy][cl->rlist.sqx]))
cl->rlist.hit = 1;
}
}
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