Rendering tool bar

LevelMeshEditor.cs

private int toolBarWidth = 50;
private int selectedTool;

private void OnSceneGUI()
{
    DrawToolBar(SceneView.lastActiveSceneView);
}

public void DrawToolBar(SceneView view)
{
    Rect rect = new Rect(0, 0, toolBarWidth, view.position.height);

    GUILayout.BeginArea(rect, EditorStyles.textArea);
    selectedTool = GUILayout.SelectionGrid(selectedTool, toolsButton, 1, EditorStyles.toolbarButton, GUILayout.Width(50), GUILayout.Height(50));

    GUILayout.EndArea();
}