C_BasePlayer::SetObserverTarget

void C_BasePlayer::SetObserverTarget( EHANDLE hObserverTarget )
{
    // If the observer target is changing to an entity that the client doesn't know about yet,
    // it can resolve to NULL.  If the client didn't have an observer target before, then
    // comparing EHANDLEs directly will see them as equal, since it uses Get(), and compares
    // NULL to NULL.  To combat this, we need to check against GetEntryIndex() and
    // GetSerialNumber().
    if ( hObserverTarget.GetEntryIndex() != m_hObserverTarget.GetEntryIndex() ||
        hObserverTarget.GetSerialNumber() != m_hObserverTarget.GetSerialNumber())
    {
        // Init based on the new handle's entry index and serial number, so that it's Get()
        // has a chance to become non-NULL even if it currently resolves to NULL.
        m_hObserverTarget.Init( hObserverTarget.GetEntryIndex(), hObserverTarget.GetSerialNumber() );

        IGameEvent *event = gameeventmanager->CreateEvent( "spec_target_updated" );
        if ( event )
        {
            gameeventmanager->FireEventClientSide( event );
        }

        if ( IsLocalPlayer() )
        {
            ResetToneMapping(1.0);
        }
    }
}