Robert,
Thanks. I looked at the CopyOp a little bit. I haven't grasped
the details of the whole procedure but it appears to be a simple
traversal and cloning whatever nodes that is marked deep copy.
Without some sort of a check list of what nodes have already been
cloned, a node with multiple parents will be cloned again and
again each time it is traversed. The CopyOp turns the graph into
a tree. I don't know if it should be expected that cloning will
not preserve the graph structure, though. I'll take a dab at a
custom cloning operation that preserves the graph, at least at the
node level.
Best Regards,
Yefei
>
> Message: 27
> Date: Wed, 24 Jan 2007 09:05:32 +0000
> From: "Robert Osfield" <[EMAIL PROTECTED]>
> Subject: Re: [osg-users] Preserving child sharing during cloning?
> To: "osg users" <[email protected]>
> Message-ID:
> <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi Yefei,
>
> If you are cloning using deep copy then pretty well all the
> scene graph elements will be cloned.
>
> There are limits on how much "intelligence" you can add to
> general purpose routines like cloning, it might be that its
> simply inappropriate to use in this instance, and custome
> clone would be much more appropriate.
>
> Robert.
>
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