public void Draw(Camera camera)
        {
            Matrix[] transforms = new Matrix[model.Bones.Count];
            model.CopyAbsoluteBoneTransformsTo(transforms);

            foreach (ModelMesh mesh in model.Meshes)
            {
                foreach (BasicEffect be in mesh.Effects)
                {
                    be.EnableDefaultLighting();
                    be.Projection = camera.projection;
                    be.View = camera.view;
                    be.World = GetWorld() * mesh.ParentBone.Transform;
                }

                mesh.Draw();
            }
        }
        /// <summary>
        /// Allows the game to perform any initialization it needs to before starting to run.
        /// This is where it can query for any required services and load any non-graphic
        /// related content.  Calling base.Initialize will enumerate through any components
        /// and initialize them as well.
        /// </summary>
        protected override void Initialize()
        {
            // Initialize Camera
            camera = new Camera(this);
            Components.Add(camera);

            // Initialize model manager
            modelManager = new ModelManager(this);
            Components.Add(modelManager);

            base.Initialize();
        }