How to change the face color of a selected topods_solid?

I can selected a face of a soild by using the MoveTo function, and get the topods_face by the DetectedShape function. However, I can't change the face  color, because the functions in the AIS_InteractiveContext can't return the topods_face pointer. Is there other way to change the color of a topods_face?

3303835946_162325's picture

It's a big problem that I can't get the pointer of a topods_shape