[osg-submissions] osg::Object::clone

[Michael Platings]

I'll preempt Robert's reply by telling you that the purpose of clone()
is to permit cloning an object of unknown type.
With the changes you have made, the following code will fail:

Object* a = new Transform();
Transform* b = dynamic_cast<Transform*>(a->clone());
assert(b);


-----Original Message-----
From: osg-submissions-bounces at lists.openscenegraph.org
[mailto:osg-submissions-bounces at lists.openscenegraph.org] On Behalf Of
??????? ?????
Sent: 06 June 2008 13:25
To: osg-submissions at lists.openscenegraph.org
Subject: [osg-submissions] osg::Object::clone

Hi, Robert!

I suggest to you to override type of returning value in realizations of
functions osg::Object::clone and osg::Object::cloneType in derived
classes. In this case one will be able to write simply "osg::Transform*
sTrans = sExistentTrans->clone();" instead of "osg::Transform* sTrans =
dynamic_cast<osg::Transform*>(sExistentTrans->clone());".

It is very simple to realize such behavior, three changed files are
attached in archive, changes are based on revision 8416.

Best regards,
Valery


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