From 03a19491f705b6519daecc3fe3191a222333fdbe Mon Sep 17 00:00:00 2001
From: Raphael <rparodi@student.42.fr>
Date: Tue, 12 Nov 2024 12:38:43 +0100
Subject: [PATCH] feat: starting to work on the raycast algorithm

---
 includes/raycast.h | 26 +++++++++++++++++++++++
 raycast/rc_utils.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 includes/raycast.h
 create mode 100644 raycast/rc_utils.c

diff --git a/includes/raycast.h b/includes/raycast.h
new file mode 100644
index 0000000..2c8966f
--- /dev/null
+++ b/includes/raycast.h
@@ -0,0 +1,26 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   raycast.h                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/11/12 12:27:30 by rparodi           #+#    #+#             */
+/*   Updated: 2024/11/12 12:29:51 by rparodi          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef RAYCAST_H
+# define RAYCAST_H
+
+#include <math.h>
+
+/**
+ * @brief Convert the degrees to radian
+ *
+ * @param degrees the value to convert
+ * @return the value converted in radian
+ */
+double	cub_convert_rad_to_deg(double degrees);
+
+#endif
diff --git a/raycast/rc_utils.c b/raycast/rc_utils.c
new file mode 100644
index 0000000..ecec33a
--- /dev/null
+++ b/raycast/rc_utils.c
@@ -0,0 +1,51 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   rc_utils.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/11/12 12:24:35 by rparodi           #+#    #+#             */
+/*   Updated: 2024/11/12 12:38:14 by rparodi          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+#include "cub3d_struct.h"
+#include "mlx_functions.h"
+#include "raycast.h"
+
+double	cub_convert_rad_to_deg(double degrees)
+{
+	return (degrees * (M_PI / 180.0));
+}
+
+void	rc_launch(double angle)
+{
+	return ;
+}
+
+/**
+ * @brief Launches algorithm over a specified width with angle adjustments.
+ *
+ * @param delta        The initial angle offset for the ray.
+ * @param spacing      The spacing between rays.
+ * @param focal        The focal length affecting the angle adjustment.
+ * @param width        The total width (number of columns) to iterate over.
+ *
+ * @note The function assumes `rc_launch` is defined elsewhere to handle the angle.
+ */
+void	shelves_launch(double delta, double spacing, double focal, int width)
+{
+    int x;
+    double angle;
+    
+    x = 0;
+    angle = 0;
+    while (x < width)
+    { 
+        angle = delta + atan((spacing / 2 - x * spacing / (width - 1)) / focal);
+        rc_launch(angle);
+        x++;
+    }
+}