Hi Terry,
cloneTree duplicates the scenegraph structure (all nodes and its
children ...) and shares all node cores.
deepCloneTree also duplicates the cores. But it is possible to share
specific core types.
// this clones all nodes but the cores of type Material and Transform
are shared.
NodePtr sceneClone = deepCloneTree(scene, "Material, Transform");
Andreas
I'm still confused. It sounds like cloneTree shares as much data as
possible, but deepCloneTree makes duplicates of as much data as
possible. The function names certainly don't suggest such completely
different approaches. Is there any documentation on this? I haven't
found any....
- Terry
On 10/17/05, Allen Bierbaum <[EMAIL PROTECTED]> wrote:
Terry Welsh wrote:
Thanks. Just an aside: how does deepCloneTree differ from cloneTree?
I haven't found a good explanation anywhere and looking at the source
code isn't helping me....
Deep cloning performs a standard deep copy. It makes a new copy of all
referenced fc's throughout the tree. In the case of a scene graph node,
this would mean make a new copy of all nodes, cores, and data referenced
by the cores (geometry, materials, images, etc -- it is *really* deep).
-Allen
On 10/17/05, Allen Bierbaum <[EMAIL PROTECTED]> wrote:
One of the things the MergeGraphOp does is remove transform cores. When
it does this it creates new copies of all the geometry cores and
transforms the contained data through the transformation matrix.
So when you clone a tree (osg::Node::clone) and then run a MergeGraphOp
on that new tree you effectively create an optimized copy of the
original tree with an entirely new copy of the contained geometry.
-Allen
Terry Welsh wrote:
Looking at the size of some scenegraphs saved by my app, I can only
guess that MergeGraphOp makes duplicate trees where cloneTree had been
used to make clones of subtrees. When I remove my MergeGraphOp call,
the filesizes are much smaller. Is this true, or am I barking up the
wrong tree?
--
Terry Welsh - mogumbo 'at' gmail.com
www.reallyslick.com | www.infiscape.com | www.vrsource.org
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Terry Welsh - mogumbo 'at' gmail.com
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