Hi Serge,
Thanks for that piece of information. I am still not getting a "deep
copy" of the nodes, however.
I did an experiment and I went to the top level node:
osg::Node* subgraph = m_sceneView->getSceneData();
and I used this one for the deep copy
osg::ref_ptr<osg::Node> copyA = static_cast<osg::Node *>(subgraph-
>clone(osg::CopyOp::DEEP_COPY_ALL ));
And now I get a few nodes in the new copy. My list now contains 3
items which makes sense because the tree is like:
subgraph
\
GroupA
\
A
/ | \
B C D
where A has 32 items.
So there is stoppage at node A and no more copy or else there is a
problem with the visitor.
findNodeVisitor nv(FINDNODETYPE_NODETYPE|
FINDNODETYPE_FINDALL,"Geode");
copyA->accept(nv);
std::vector<osg::Node*> nodeList = nv.getNodeList();
int length = nodeList.size();
now length is 3 (but at this level it should be 35).
Judie
On Apr 17, 8:04 am, "Serge Lages" <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Just cast the clone() return to an osg::Node * and it should work :
>
> osg::ref_ptr<osg::Node> copyA = static_cast<osg::Node *>(A->clone(
> osg::CopyOp::DEEP_COPY_ALL ));
>
>
>
>
>
> On Thu, Apr 17, 2008 at 4:54 PM, Judie <[EMAIL PROTECTED]> wrote:
> > Hi Paul,
>
> > Does that work on your compiler? I tried that as well, but I got the
> > following error:
>
> > error C2440: 'initializing' : cannot convert from 'class osg::Object
> > *' to 'class osg::ref_ptr<class osg::Node>'
> > No constructor could take the source type, or constructor
> > overload resolution was ambiguous
>
> > So then I tried using the parent of the node which is a group and
> > create a group from that using the deep copy:
>
> > osg::Ref_Ptr<osg::Group> CopyAParent = new osg::Group(*AParent,
> > osg::CopyOp::DEEP_COPY_ALL);
>
> > but it still doesn't have any nodes in the list:
>
> > osg::Node *test = m_CopyAParent ->getChild(0);
> > findNodeVisitor nv1(FINDNODETYPE_NODETYPE|FINDNODETYPE_FINDALL,
> > "Geode");
> > test->accept(nv1);
> > std::vector<osg::Node*> nodeList = nv1.getNodeList();
> > int length = nodeList.size();
>
> > here length is 0.
>
> > Thanks,
>
> > Judie
>
> > On Apr 16, 6:47 pm, "Paul Martz" <[EMAIL PROTECTED]> wrote:
> > > Ha! What a coincidence. I just encountered this exact same thing today.
>
> > > When you call "new Node", you get a Node. Nodes don't have children,
> > only
> > > Groups have children. So you don't want to use the copy constructor if
> > you
> > > want to copy a whole subtree.
>
> > > I discovered that OSG offers an alternative to the copy constructor to
> > get
> > > around just this very issue. Use the clone() method. So, instead, your
> > code
> > > should look like this:
>
> > > osg::ref_ptr<osg::Node> copyA = A->clone( osg::CopyOp::DEEP_COPY_ALL
> > );
>
> > > "copyA" will be a ref_ptr to a Node, but the actual type of the object
> > > pointed to will be a clone of A, so if A is a Group (with children),
> > then
> > > copyA will also be a Group.
>
> > > Later,
> > > -Paul
>
> > > > -----Original Message-----
> > > > From: [EMAIL PROTECTED]
> > > > [mailto:[EMAIL PROTECTED] On Behalf Of Judie
> > > > Sent: Wednesday, April 16, 2008 2:21 PM
> > > > To: [EMAIL PROTECTED]
> > > > Subject: [osg-users] Using a visitor after a DEEP_COPY_ALL
> > > > doesn't returnanything
>
> > > > HI,
>
> > > > I want to make a copy of an existing node and all it's
> > > > children, and then find all the geometry and make it transparent.
>
> > > > I do something like
>
> > > > osg::ref_ptr<osg::Node> copyA = new osg::Node(*A,
> > > > osg::CopyOp::DEEP_COPY_ALL);
>
> > > > where A is the original Node tree.
>
> > > > If I try to use the findNodeVisitor:
>
> > > > findNodeVisitor nv(FINDNODETYPE_NODETYPE|FINDNODETYPE_FINDALL,
> > > > "Geode");
> > > > copyA->accept(nv);
> > > > std::vector<osg::Node*> nodeList = nv.getNodeList(); int
> > > > length = nodeList.size();
>
> > > > then length is 0.
>
> > > > If I do the same with the original node:
>
> > > > findNodeVisitor nv(FINDNODETYPE_NODETYPE|FINDNODETYPE_FINDALL,
> > > > "Geode");
> > > > A->accept(nv);
> > > > std::vector<osg::Node*> nodeList = nv.getNodeList(); int
> > > > length = nodeList.size();
>
> > > > then length is 32.
>
> > > > Also if I try to cast the copyA to a osg::Group* I get a null pointer:
>
> > > > osg::Group* temp = dynamic_cast<osg::Group*>(copyA);
>
> > > > temp is a null pointer.
>
> > > > So did I miss a step somewhere?
>
> > > > Judie
>
> > > > _______________________________________________
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> > > > negraph.org
>
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> --
> Serge Lageshttp://www.tharsis-software.com
>
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