I will be happy if a userData property added to Body class

like userData in NxActorDesc .

Because I'm willing to add more functionality to Body. So I need a pointer refer to another Object. I don't feel like to inherit from Body. If so, I have to add scene->createInheritedBody() method, which is tiresome.

No. I wrote several paragraphs a few months back saying it's tacky and not OO like. It's not hard to inherit from Actor or even Body. When '22 it'll become easier for factory methods.

But the answer is still no.