The type in a dynamic_cast must be a pointer or reference to a complete class type, or void *

Question

I am hoping there is someone out there who understands why the code below fails. I am trying to get an instance of PositionAttitudeTransform (Openscenegraph class) from an osg::Node* node object. But there is the compiler error below in bold.

 void CameraPosCallbackUpdate::operator()(osg::Node* node, osg::NodeVisitor* nv)
{ 
   // other code goes here

    osg::PositionAttitudeTransform* pat = dynamic_cast<osg::PositionAttitudeTransform*> (node);

}

IntelliSense: the type in a dynamic_cast must be a pointer or reference to a complete class type, or void *

Please help me with correct way to access my object and I would appreciate help in understanding what the problem here is since I believe the cast should be possible.

Hierarchy http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a00529.html

You need to show the declaration of `node`. As the error message says, it should be a pointer or reference to a complete type. — Alok Save, Oct 30 '12 at 05:53
Is the type, in fact, complete? Is a definition for it visible from here? — Luc Danton, Oct 30 '12 at 06:09
As compiler said to you you have not included osg::PositionAttitudeTransform implementation — Denis Ermolin, Oct 30 '12 at 06:15

score 14 · Accepted Answer · answered Oct 30 '12 at 06:15

14

I believe you have to #include the header file which contains the body of class osg::PositionAttitudeTransform.
dynamic_cast gives such error when the body of the destination class is not visible.

Here is the similar error reproduced in g++.

answered Oct 30 '12 at 06:15

iammilind

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Thank you. I had to remove the #include and replaced it with #include . – Kobojunkie Oct 30 '12 at 07:18

The type in a dynamic_cast must be a pointer or reference to a complete class type, or void *

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