Allow changing the fov and render distance

include/JGL/JGL.h

@@ -200,6 +200,9 @@ namespace JGL {
 
     /// Drawing functions for primitive 3D Shapes.
     namespace J3D {
+        void Init(const Vector2& window_size, float fov, float far_plane);
+        void ChangeFOV(float fov);
+        void ChangeFarPlane(float far_plane);
         void Begin();
         void End();
         void SetMatrix(const std::vector<GLfloat>& matrix, const Vector2& window_size);