Re: [Boost-users] Boost.Python: wrapping OpenSceneGraph smart pointers, again

20 Oct 2009

      It's surprisingly simple, it turns out.

First, you have to tag the OSG smart pointer type, as follows:
-------------------
#ifndef REF_PTR_TRAIT_
#define REF_PTR_TRAIT_

#include 
#include 

namespace boost {
  namespace python {
    template <class T> struct pointee< osg::ref_ptr<T> >
    { typedef T type; };
  }}

#endif
-------------------

Then, in a BOOST_PYTHON_MODULE, you can write:

  class_("Node", init<>())
    ;

You can of course add as many of the Node class's methods as desired.

Randolph

On 2009-10-14, OvermindDL1  wrote:
...
On Tue, Oct 13, 2009 at 7:34 PM, Randolph Fritz  wrote:
...
What is wrong with the following code?  I suspect I'm doing something
silly, and I suspect the answer is obvious.
 #include 
 #include 
 #include 
 #include 
 using namespace osg;
 typedef ref_ptr<Node> NodePtr;
 using namespace boost::python;
 BOOST_PYTHON_MODULE(NodePtr) {
   class_("NodePtr")
     ;
 }
Boost.Python knows Boost and TR1 smart pointers, not any others.  If
you are using any others (ref_ptr in this case I gather) then you need
to make Boost.Python aware of it, I am not sure how, reading through
the code might reveal how.
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-- 
Randolph Fritz
  design machine group, architecture department, university of washington
rfritz@u.washington.edu -or- rfritz333@gmail.com