Normed

1 files changed, 121 insertions, 0 deletions

diff --git a/src/ft_can_it_shoot.c b/src/ft_can_it_shoot.c
new file mode 100644
index 0000000..0c76f3d
--- /dev/null
+++ b/src/ft_can_it_shoot.c
@@ -0,0 +1,121 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   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));
+}