From 989ee470df117ace4eedcabaac8c4e317cd7a165 Mon Sep 17 00:00:00 2001
From: Emmanuel AYME <eayme44@gmail.com>
Date: Sun, 22 Feb 2026 11:22:48 +0100
Subject: [PATCH] Add Horizontal to vertical FOV convert and vice versa

---
 libs/Maths/Maths.cpp | 10 +++++++++-
 libs/Maths/Maths.hpp |  4 ++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/libs/Maths/Maths.cpp b/libs/Maths/Maths.cpp
index 84870a4..cacf6a1 100644
--- a/libs/Maths/Maths.cpp
+++ b/libs/Maths/Maths.cpp
@@ -7,11 +7,19 @@
 #include "Maths.hpp"
 #include <cmath>
 
+float Maths::FOVHToV(float fovH, float aspect) {
+    return 2.0f * std::atan(std::tan(fovH * 0.5f * (M_PI / 180.0f)) / aspect) * (180.0f / M_PI);
+}
+
+float Maths::FOVVToH(float fovV, float aspect) {
+    return 2.0f * std::atan(std::tan(fovV * 0.5f * (M_PI / 180.0f)) * aspect) * (180.0f / M_PI);
+}
+
 double Maths::DegreesToRadians(double degrees) {
     return degrees * M_PI / 180.0;
 }
 
-// Convertit des radians en degrés
+// Converts radians in degree
 double Maths::RadiansToDegrees(double radians) {
     return radians * 180.0 / M_PI;
 }
diff --git a/libs/Maths/Maths.hpp b/libs/Maths/Maths.hpp
index f7d9892..63415e9 100644
--- a/libs/Maths/Maths.hpp
+++ b/libs/Maths/Maths.hpp
@@ -7,6 +7,10 @@ class Maths
     public:
         // Compute new horizontal FOV based on native and target aspect ratio
         static double CompensateHorizontalFOV(const double baseHorizontalFOVDeg, const double baseAspectRatio, const double targetAspectRatio);
+        // Compute FOV horizontal to vertical based on aspect ratio
+        static float FOVHToV(float fovH, float aspect);
+        // Compute FOV vertical to horizontal based on aspect ratio
+        static float FOVVToH(float fovV, float aspect);
 
     private:
         static double DegreesToRadians(double degrees);