The following are system events in the Kernel object which can be monitored:

• Kernel::m_eFrame - Triggered when a new frame is displayed on the viewport.
• Kernel::m_eEndRender - Triggered when rendering of an image to the screen is completed.
• Kernel::m_eLowMemory - Triggered when memory status is critical.
• Kernel::m_eRestoreMemory - Triggered when memory status is no longer critical.
• Kernel::m_ePostRender - Triggered at end of rendering a scene to a RenderTarget.

The following example demonstrates how to monitor a low memory event.

class MyClass : public Node  {
    aevent lowMemoryEventReceiver;

    MyClass() {
        lowMemoryEventReceiver.Connect( Kernel()->m_eLowMemory );
    };
        
    void OnEvent( const EventGate &cEvent ) {
        if ( cEvent == m_eLowMemory ) {
            // free some buffers
        }
    }
};