the osg::ref_ptr<> could be wrapped into a smart pointer, right? But what's the point ;)
2016-04-07 10:33 GMT+02:00 Sebastian Messerschmidt < sebastian.messerschm...@gmx.de>: > Hi Vincent, > >> Hello >> >> I'm trying to use osg:Vec3Array with a c++11 smart pointer instead of osg >> smart pointer. I aim to join two APIs: osg and another one using C++11 >> smart pointer. Apparently, this is a destructor problem: ~TemplateArray<>() >> is private, so an explicit delete doesn't work. I have test many cases to >> understand the problem. >> >> >> Code: >> osg::Vec3Array * test = new osg::Vec3Array(); >> delete test; // error here >> >> >> >> >> Code: >> std::shared_ptr<osg::Vec3Array> test2(new osg::Vec3Array()); // error due >> to pointer releasing >> >> >> >> >> Code: >> osg::Vec3Array test; // not work >> >> >> >> >> Code: >> osg::ref_ptr<osg::Vec3Array> test3 = new osg::Vec3Array(); // this work >> fine. >> >> >> >> So there are few solutions to use the Vec3Array: use osg smart pointer. >> What is the reason the destructor is protected even through the method is >> empty? Maybe to force developers to use smart pointers but I'm constrained >> to use c++11 smart pointer due to the second api. I think the only way, is >> to create a C++11 smart pointer templated by osg smart pointer or a class >> which contains the osg smart pointer. >> > First of all, the osg will manage the array fine when you keep it in a > drawable, so there should no need to use your own management. If you need > to hold it outside, simply use the ref_ptr. the ref_ptr is basically an > smart-pointer for osg::Object derived objects. > The reason the destructor is private is to prevent stack-instances of the > type and to disallow use patterns like yours. > If i remember correctly there was some guide on this in the wiki/trac. > > > Do you have an idea to use C+11 smart pointer instead of osg one? > > Simply don't. It would not solve a single problem and would create > pitfalls. > Use the osg::ref_ptr if you need to keep an object (it acts as a "shared > ptr"). If you need a week smart ptr you can use observer pointer. > > > Cheers > Sebastian > > > >> Thank you! >> >> Cheers, >> Vincent >> >> ------------------ >> Read this topic online here: >> http://forum.openscenegraph.org/viewtopic.php?p=66760#66760 >> >> >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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