Hue shift + events to camera

src/magnum_render.h

@@ -46,11 +46,15 @@ public:
 
   void draw(const Matrix4 &transformation, SceneGraph::Camera3D &camera);
   void count(int count);
+  void hue(float hue);
+  void t(float t);
 
 private:
   Shaders::Phong &m_shader;
   GL::Mesh &m_mesh;
   int m_count;
+  float m_hue;
+  float m_t;
 };
 
 class MagnumRenderer {
@@ -68,6 +72,7 @@ public:
   void t(float t);
   void hue(float hue);
   void count(int count);
+  Containers::Optional<ArcBallCamera> camera();
 
 private:
   void lazyInitialize();
@@ -91,6 +96,7 @@ private:
   GL::Mesh m_grid{NoCreate};
   Shaders::Flat3D m_gridShader{NoCreate};
   Object3D* m_gridObject{nullptr};
+  GridDrawable* m_gridDrawable{nullptr};
 };
 
 #endif // MAGNUM_RENDER_H