控制鼠标单击的物体

void AMyCharacter::PossesClicked()
{
    APlayerController* PlayerController = Cast<APlayerController>(GetController());
    if (PlayerController != nullptr)
    {
        // Get the coordinates of the mouse from our controller
        float LocationX;
        float LocationY;
        PlayerController->GetMousePosition(LocationX, LocationY);
        // Do a trace and see if there the position intersects something in the world
        FVector2D MousePosition(LocationX, LocationY);
        FHitResult HitResult;
        const bool bTraceComplex = false;
        if (PlayerController->GetHitResultAtScreenPosition(MousePosition, ECC_Visibility, bTraceComplex, HitResult) == true )
        {
            // If the actor we intersected with is a controller posses it
            APawn* ClickedPawn = Cast<APawn>(HitResult.GetActor());
            if( ClickedPawn != nullptr )
            {
                // Unposses ourselves
                PlayerController->UnPossess();
                // Posses the controller we clicked on
                PlayerController->Possess(ClickedPawn);
            }
        }  

    }
}