HI Chase,
Would :
osg::Object::setUserData(Referenced*) be what you are looking for?
osg::Node subclasses from osg::Object so has the same user data too.
Robert.
On 2/7/07, Bradford, Chase <[EMAIL PROTECTED]> wrote:
Hi Everyone,
I was wondering if it would be feasible to add a Referenced* member variable
to osg::Node in the OSG base that could be used for arbitrary information
tagging?
I'm currently developing a project where picking specific nodes in the scene
needs to trigger specific actions in our GUI, and building the connections
between the node and the GUI is quite difficult. The application is broken
down into a system where some classes (call them Foos) own nodes, and
changes to the nodes are triggered through the Foo interface. When a
specific node is clicked, I want to notify its Foo. I've tried implementing
this with event callbacks and global maps from nodes to Foos, but both of
those solutions seem overly cumbersome.
We modified our version of OSG to have a tag field in osg::Node. For
simplicity, we only fill this field with types based of OsgTag (inherited
from osg::Referenced), which is a class we defined just for this problem.
To pull it off, we added this chunk of code to the end of osg::Node's class
description:
public:
void setTag( osg::Referenced* tag ) { _tag = tag; }
osg::Referenced* getTag() { return _tag.get(); }
const osg::Referenced* getTag() const { return _tag.get(); }
private:
osg::ref_ptr<osg::Referenced> _tag;
I think this is a small change that won't impact too many other aspects of
the library, but can be very powerful if used cautiously. Also, when I
would rather not change the OSG code if I can help it, and if it's in future
releases, I won't have to.
Thanks,
Chase Bradford
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