private void OpenFile(object sender, RoutedEventArgs e)
        {
            if (currScene.modified)
            {
                MessageBoxResult ifSave = System.Windows.MessageBox.Show("Czy chesz zapisać bieżącą scenę ?", "", MessageBoxButton.YesNo, MessageBoxImage.Question);
                if (ifSave == MessageBoxResult.Yes)
                {
                    SaveFileAs(sender, e);
                }
            }

            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();

            dlg.Filter = "Pliki sceny |*.scn|Wszystkie pliki |*.*";
            //dlg.InitialDirectory = System.IO.Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName);

            Nullable<bool> result = dlg.ShowDialog();

            if (result == true)
            {
                undo = null;
                undo = new UndoStack();
                Scene fileScene = Scene.ReadSceneFromFile(dlg.FileName);
                if (fileScene != null)
                {
                    currScene = fileScene;

                    Renderer.RecalculateData(currScene);

                    cameraPan.newSceneLoaded();
                    cameraPan.comboBox1.SelectedIndex = currScene.activeCamera;

                    RenderViews();
                }
                else
                {
                    System.Windows.MessageBox.Show("Wybrany plik ma niepoprawny format.", "Błąd", MessageBoxButton.OK, MessageBoxImage.Warning);
                }
                trNumTBG1.Text = currScene.triangles.Count().ToString();
                trNumTBG2.Text = currScene.triangles.Count().ToString();
                trNumTBG3.Text = currScene.triangles.Count().ToString();
                trNumTBG4.Text = currScene.triangles.Count().ToString();
            }
            currScene.selectedHierObj = null;
        }
        private void NowyB_Click(object sender, RoutedEventArgs e)
        {
            if(currScene.modified == true)
            {
                MessageBoxResult ifSave = System.Windows.MessageBox.Show("Czy chesz zapisać bieżącą scenę ?", "", MessageBoxButton.YesNo, MessageBoxImage.Question);
                if(ifSave == MessageBoxResult.Yes)
                {
                    SaveFileAs(sender, e);
                }
            }

            //SurfaceRenderer.Render(new Material_("mat1", 0.6f, 0.95f, 0.5f, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 100, 1, 1, 1));
            currScene = null;
            undo = null;
            undo = new UndoStack();
            currScene = new Scene();
            trNumTBG1.Text = currScene.triangles.Count().ToString();
            trNumTBG2.Text = currScene.triangles.Count().ToString();
            trNumTBG3.Text = currScene.triangles.Count().ToString();
            trNumTBG4.Text = currScene.triangles.Count().ToString();

            Renderer.RecalculateData(currScene);
            cameraPan.newSceneLoaded();
            cameraPan.comboBox1.SelectedIndex = currScene.activeCamera;
            currScene.selectedHierObj = null;

            //sceneChange = false;
            RenderViews();
        }