Require OpenGL 4.6 core context and regenerate glad

rendering/openglcamera.h

@@ -64,9 +64,6 @@ public:
                     point = this->m_inversetransformation * point;
                     // ...and scale by transformed w
                     point = glm::vec4{ glm::vec3{ point } / point.w, 1.f }; } ); }
-    // debug helper, draws shape of frustum in world space
-    void
-        draw( glm::vec3 const &Offset ) const;
 
 private:
 // members: