private void OnEnable()
{
if (m_gridTexture == null)
{
m_gridTexture = Resources.Load <Texture>("BevTree/EditorGUI/background");
}
if (m_graph == null)
{
m_graph = BTEditorGraph.Create();
}
if (m_canvas == null)
{
m_canvas = new BTEditorCanvas();
BTEditorCanvas.Current = m_canvas;
}
if (m_hotkeyHandler == null)
{
m_hotkeyHandler = new BTEditorHotKeyHandler(m_graph);
}
if (m_grid == null)
{
m_grid = new BTEditorGrid(m_gridTexture);
}
if (m_navigationHistory == null)
{
m_navigationHistory = new BTNavigationHistory();
}
ReloadBehaviourTree();
m_isDisposed = false;
m_canvas.OnRepaint += OnRepaint;
EditorApplication.playmodeStateChanged += HandlePlayModeChanged;
// debugging
Selection.selectionChanged += delegate { SetupBTDebugging(); };
}