Socallback.h -
#include <Inventor/nodes/SoSubNode.h>
class SoCallback
The SoCallback class is a node type which provides a means of setting callback hooks in the scene graph.
By inserting SoCallback nodes in a scene graph, the application programmer can set up functions to be executed at certain points in the traversal. "
typedef void SoCallbackCB (void *userdata, SoAction *action)
Signature that callback functions need to have.
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