Scene::viewportWidth/viewportHeight were never set, got rid of them.

Caused setting viewport size to some random and possibly dangerous value
after assigning camera to the scene.

src/Scene.cpp

@@ -54,7 +54,7 @@ void Scene::setCamera(Camera* camera) {
     /* Set new camera active */
     _camera = camera;
     if(_camera) {
-        _camera->setViewport(viewportWidth, viewportHeight);
+        if(oldCamera) _camera->setViewport(oldCamera->viewport());
         _camera->setActive(this);
     }
 

src/Scene.h

@@ -98,8 +98,6 @@ class Scene: public Object {
         Camera* _camera;
         GLuint vao;
 
-        unsigned int viewportWidth, viewportHeight;
-
         inline virtual void draw(const Magnum::Matrix4& transformationMatrix, const Magnum::Matrix4& projectionMatrix) {}
         void drawChildren(Object* object, const Matrix4& transformationMatrix);
 };