Add Horizontal to vertical FOV convert and vice versa

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);