[osg-users] Iterating over all vertices in scene

[Robert Osfield]

Hi Matt,

Use a combination of custom NodeVisitor to traverse the scene, and an
osg::Drawable::ArrayFunctor to traverse the vertices.  When you handle
the Drawable's you can get the world transform by either accumulating
the transform yourself during the NodeVisitor traversal or use
osg::Node::getWorldMatrices() or osg::computeLocalToWorld(NodePath)
using the NodeVisitor::getNodePath() for the node path.

Robert.

On 18 May 2015 at 06:34, Matt Donahoe <matt at skyd.io> wrote:
> Hi,
>
> I would like to build and export a point cloud from all the vertices in my scene. Ideally I would be able to iterate over all the vertices in global coordinates. Can someone point me in the right direction?
>
> I assume I need some kind of NodeVisitor. I have been reading the MeshOptimizer code, but I am wondering if there is a simpler way to get the vertex data transformed into the global frame.
>
> Thank you!
>
> Cheers,
> Matt
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=63752#63752
>
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>
>
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