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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_can_it_shoot.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:28:51 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:28:51 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <cub3d.h>
#include <stdlib.h>
#include <math.h>
static double
ft_get_a_big(int8_t id, double d, t_cub *cl)
{
double a_big;
a_big = 0;
if (cl->sprites[13][id].s_pos_y > cl->plist.pos_y)
{
while (a_big < cl->sprites[13][id].s_pos_y - cl->plist.pos_y)
a_big += 0.001;
}
else if (cl->sprites[13][id].s_pos_y < cl->plist.pos_y)
{
while (a_big < cl->plist.pos_y - cl->sprites[13][id].s_pos_y)
a_big += 0.001;
}
else
a_big = d;
return (a_big);
}
static double
ft_get_b_big(int8_t id, t_cub *cl)
{
double b_big;
b_big = 0;
if (cl->sprites[13][id].s_pos_x > cl->plist.pos_x)
{
while (b_big < cl->sprites[13][id].s_pos_x - cl->plist.pos_x)
b_big += 0.0001;
}
else if (cl->sprites[13][id].s_pos_x < cl->plist.pos_x)
{
while (b_big < cl->plist.pos_x - cl->sprites[13][id].s_pos_x)
b_big += 0.0001;
}
return (b_big);
}
static void
ft_init_ray_vars(int8_t id, double d, t_cub *cl)
{
double a_big;
double b_big;
double teta;
a_big = ft_get_a_big(id, d, cl);
b_big = ft_get_b_big(id, cl);
if (a_big > b_big)
teta = acos(a_big / d);
else
teta = asin(b_big / d);
cl->rlist.y_ray_dir = 1 * cos(teta);
cl->rlist.x_ray_dir = 1 * sin(teta);
if (cl->plist.pos_y > cl->sprites[13][id].s_pos_y)
cl->rlist.y_ray_dir = -cl->rlist.y_ray_dir;
if (cl->plist.pos_x > cl->sprites[13][id].s_pos_x)
cl->rlist.x_ray_dir = -cl->rlist.x_ray_dir;
cl->rlist.y_ray_pos = cl->plist.pos_y;
cl->rlist.x_ray_pos = cl->plist.pos_x;
ft_detection_init_x(cl);
ft_detection_init_y(cl);
}
static int8_t
ft_shoot_cast_loop(int8_t id, double sqy, double sqx, t_cub *cl)
{
uint8_t hit;
hit = 0;
while (hit == 0)
{
if (cl->rlist.x_side_dist < cl->rlist.y_side_dist)
{
cl->rlist.x_side_dist += cl->rlist.x_delta_dist;
sqy += cl->mlist.x_step * 0.01;
}
else
{
cl->rlist.y_side_dist += cl->rlist.y_delta_dist;
sqx += cl->mlist.y_step * 0.01;
}
if ((sqy >= cl->sprites[13][id].s_pos_y - 0.15 &&
sqy <= cl->sprites[13][id].s_pos_y + 0.15) &&
(sqx >= cl->sprites[13][id].s_pos_x - 0.15 &&
sqx <= cl->sprites[13][id].s_pos_x + 0.15))
break ;
if (cl->mlist.map[(uint64_t)(sqy + 0.5)][(uint64_t)(sqx + 0.5)] == '1')
hit = 1;
}
return ((hit == 1) ? (0) : (1));
}
int8_t
ft_can_it_shoot(int8_t id, double d, t_cub *cl)
{
double sqx;
double sqy;
ft_init_ray_vars(id, d, cl);
sqy = cl->rlist.y_ray_pos;
sqx = cl->rlist.x_ray_pos;
return (ft_shoot_cast_loop(id, sqy, sqx, cl));
}
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