From 2bc214103bfb1479254b7f2287ec66d842195dc9 Mon Sep 17 00:00:00 2001
From: Theo Champion <tchampio@student.42lehavre.fr>
Date: Thu, 31 Jul 2025 14:07:56 +0200
Subject: [PATCH] feat: Added delta time variable

---
 Makefile          |  1 +
 src/cub3d_data.h  |  4 +++-
 src/main.c        |  6 +++++-
 src/utils/inits.c |  4 +++-
 src/utils/time.c  | 23 +++++++++++++++++++++++
 src/utils/time.h  | 18 ++++++++++++++++++
 6 files changed, 53 insertions(+), 3 deletions(-)
 create mode 100644 src/utils/time.c
 create mode 100644 src/utils/time.h

diff --git a/Makefile b/Makefile
index f1539c3..1d4dcb0 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ IFLAGS = -I./mlx -I./libft
 
 SOURCEFILES = \
 		src/utils/inits.c \
+		src/utils/time.c \
 		src/draw/draw_map.c \
 		src/draw/drawutils.c \
 		src/main.c \
diff --git a/src/cub3d_data.h b/src/cub3d_data.h
index 83c6678..4cdc95f 100644
--- a/src/cub3d_data.h
+++ b/src/cub3d_data.h
@@ -6,7 +6,7 @@
 /*   By: kcolin <kcolin@42.fr>                      +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/07/17 14:59:37 by kcolin            #+#    #+#             */
-/*   Updated: 2025/07/31 13:23:32 by kcolin           ###   ########.fr       */
+/*   Updated: 2025/07/31 13:55:08 by tchampio         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -28,6 +28,8 @@ typedef struct s_cub3d_data
 	t_player		player;
 	t_keypresses	keypresses;
 	int				*screen_matrix;
+	int				delta;
+	int				last_tick;
 }	t_cub3d_data;
 
 #endif // CUB3D_DATA_H
diff --git a/src/main.c b/src/main.c
index 1ca5d62..91c4a01 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,7 +6,7 @@
 /*   By: kcolin <kcolin@42.fr>                      +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/07/17 14:14:30 by kcolin            #+#    #+#             */
-/*   Updated: 2025/07/31 13:30:05 by tchampio         ###   ########.fr       */
+/*   Updated: 2025/07/31 13:57:08 by tchampio         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -21,16 +21,19 @@
 #include "raycast/ray.h"
 #include "utils/hooks.h"
 #include "utils/inits.h"
+#include <bits/types/struct_timeval.h>
 #include <stdbool.h>
 #include <X11/keysym.h>
 #include <X11/X.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include "utils/time.h"
 
 int	game_loop(t_cub3d_data *data)
 {
 	t_ray	ray;
 
+	data->delta = (get_milliseconds() - data->last_tick);
 	mlx_destroy_image(data->mlx, data->img_data->img);
 	data->img_data->img = mlx_new_image(data->mlx, WIDTH, HEIGHT);
 	reset_matrix(data);
@@ -41,6 +44,7 @@ int	game_loop(t_cub3d_data *data)
 	mlx_put_image_to_window(data->mlx, data->mlx_win,
 		data->img_data->img, 0, 0);
 	mlx_string_put(data->mlx, data->mlx_win, 10, 10, 0x00FFFFFF, COMPILED_TEXT);
+	data->last_tick = get_milliseconds();
 	return (0);
 }
 
diff --git a/src/utils/inits.c b/src/utils/inits.c
index 694e161..48343e5 100644
--- a/src/utils/inits.c
+++ b/src/utils/inits.c
@@ -6,11 +6,12 @@
 /*   By: tchampio <tchampio@student.42lehavre.      +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/07/31 13:26:53 by tchampio          #+#    #+#             */
-/*   Updated: 2025/07/31 13:28:03 by tchampio         ###   ########.fr       */
+/*   Updated: 2025/07/31 14:01:39 by tchampio         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "../cub3d_data.h"
+#include "time.h"
 #include "../../libft/includes/libft.h"
 #include "../../mlx/mlx.h"
 #include "../map/map_checker.h"
@@ -35,4 +36,5 @@ void	init_cub3d_data(t_cub3d_data *data, char **argv)
 			&data->img_data->endian);
 	init_player(&data->player, data->map);
 	data->screen_matrix = ft_calloc(sizeof(int), WIDTH * HEIGHT);
+	data->delta = get_milliseconds();
 }
diff --git a/src/utils/time.c b/src/utils/time.c
new file mode 100644
index 0000000..9632e39
--- /dev/null
+++ b/src/utils/time.c
@@ -0,0 +1,23 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   time.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tchampio <tchampio@student.42lehavre.      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/07/31 13:51:49 by tchampio          #+#    #+#             */
+/*   Updated: 2025/07/31 14:12:48 by tchampio         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "time.h"
+#include <sys/time.h>
+#include <stdlib.h>
+
+int	get_milliseconds(void)
+{
+	struct timeval	tv;
+
+	gettimeofday(&tv, NULL);
+	return (tv.tv_usec / 1000);
+}
diff --git a/src/utils/time.h b/src/utils/time.h
new file mode 100644
index 0000000..ab7e8f3
--- /dev/null
+++ b/src/utils/time.h
@@ -0,0 +1,18 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   time.h                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tchampio <tchampio@student.42lehavre.      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/07/31 13:53:44 by tchampio          #+#    #+#             */
+/*   Updated: 2025/07/31 13:54:08 by tchampio         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef TIME_H
+# define TIME_H
+
+int	get_milliseconds(void);
+
+#endif