Dear root users, I’m using eve to visualize geometry and events with projection and multi-view, just like alice_esd.C, but I am using gdml file to import geometry instead of extracted shapes.

To learn about projection, I modified projection.C, replacing the geometry element “TEveGeoShapeExtract*” with “TEveGeoTopNode*”, and the projection axes didn’t show up. I can see the axes element in the hierarchy, but it doesn’t show up in the viewer.

Can projection work with gdml models? How can I solve this problem?

By the way, I saw that “TEveGeoShapeExtract” was used in many tutorials, is there any tutorial showing how to make objects of this class? TGeoManager seems to close the geometry immediately after gdml is imported, can I still extract shapes after geometry is closed?