From 2bc91ff7a1cdb2c7a97df74d89609e0c3ca1bb8e Mon Sep 17 00:00:00 2001
From: salaaad2 <arthurdurant263@gmail.com>
Date: Fri, 21 Feb 2020 21:44:26 +0100
Subject: que des maths

---
 inc/cub3d.h         |  1 -
 inc/cub3d_structs.h | 10 ++++++++--
 src/ft_get_sprite.c | 20 +++++++++++++++++++-
 src/ft_raycasting.c | 12 ++++++++++++
 4 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/inc/cub3d.h b/inc/cub3d.h
index 09ea32e..87f6ef3 100644
--- a/inc/cub3d.h
+++ b/inc/cub3d.h
@@ -83,6 +83,5 @@ void				ft_draw_circle(int32_t a, int32_t b,
 								int32_t color, t_cub *cl);
 void				ft_draw_texture(t_cub *cl, int x, int y, int tex_y);
 int8_t				ft_check_not_found(const char *path);
-void				ft_calc_tex(t_cub *clist);
 
 #	endif
diff --git a/inc/cub3d_structs.h b/inc/cub3d_structs.h
index 7731563..72cc377 100644
--- a/inc/cub3d_structs.h
+++ b/inc/cub3d_structs.h
@@ -49,14 +49,19 @@ typedef struct		s_rgb
 
 typedef struct		s_sprite
 {
-	int32_t			s_x;
-	int32_t			s_y;
+	int32_t			s_pos_x;
+	int32_t			s_pos_y;
+	double			s_x;
+	double			s_y;
 	int32_t			s_h;
 	int32_t			s_w;
 	int32_t			s_start_x;
 	int32_t			s_start_y;
 	int32_t			s_tex_y;
+	double			sprite_transform_x;
+	double			sprite_transform_y;
 	double			sprite_dist;
+	double			inv_c_m;
 }					t_sprite;
 
 typedef struct		s_player
@@ -128,6 +133,7 @@ typedef struct		s_cub
 	struct s_rgb	f_rgb;
 	struct s_rgb	c_rgb;
 	struct s_img	tlist[5];
+	struct s_sprite	sp_list;
 }					t_cub;
 
 #	endif
diff --git a/src/ft_get_sprite.c b/src/ft_get_sprite.c
index 43de290..806489f 100644
--- a/src/ft_get_sprite.c
+++ b/src/ft_get_sprite.c
@@ -17,8 +17,26 @@
 void
 	ft_get_sprite_spawn(t_cub *clist)
 {
+	size_t	x;
+	size_t	y;
 
-	(void)clist;
+	x = 1;
+	y = 1;
+	while (clist->mlist->map[y])
+	{
+		while (clist->mlist->map[y][x])
+		{
+			if (ft_ischarset("2", clist->mlist->map[y][x]))
+			{
+				clist->sp_list.s_pos_x = x + 0.5;
+				clist->sp_list.s_pos_y = y + 0.5;
+				return ;
+			}
+			x++;
+		}
+		x = 1;
+		y++;
+	}
 }
 
 int8_t
diff --git a/src/ft_raycasting.c b/src/ft_raycasting.c
index dd2be64..589d2da 100644
--- a/src/ft_raycasting.c
+++ b/src/ft_raycasting.c
@@ -16,6 +16,17 @@
 #include <math.h>
 
 void
+	ft_calc_sprite(t_cub *cl)
+{
+	cl->sp_list.s_x = cl->sp_list.s_pos_x - cl->plist->pos_x;
+	cl->sp_list.s_y = cl->sp_list.s_pos_y - cl->plist->pos_y;
+	cl->sp_list.inv_c_m = 1.0 / (cl->plist->plane_x * cl->plist->dir_x - cl->plist->dir_y * cl->plist->plane_y);
+  cl->sp_list.sprite_transform_x = cl->sp_list.inv_c_m * (cl->plist->dir_y * cl->sp_list.s_x - cl->plist->dir_x * cl->sp_list.s_y);
+  cl->sp_list.sprite_transform_y = cl->sp_list.inv_c_m * (cl->plist->plane_y * cl->sp_list.s_x - cl->plist->plane_x * cl->sp_list.s_y);
+
+}
+
+static void
 	ft_calc_tex(t_cub *clist)
 {
 	if (clist->rlist.side == 0)
@@ -83,6 +94,7 @@ void
 			cl->rlist.wall_b = wl->y_size - 1;
 		ft_choose_tex(cl);
 		ft_calc_tex(cl);
+		ft_calc_sprite(cl);
 		ft_draw_verline(cl, i, cl->rlist.wall_t, cl->rlist.wall_b);
 		i++;
 	}
-- 
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