GeoGebra Augmented Reality: Modeling a 2-Piece Lampshade

GeoGebra Augmented Reality allows the user to SET RESTRICTIONS on surface equations. Notice the equations on the bottom of the screencast restrict the values of both x and y. What other kinds of 3D every-day, real-life objects can students model with 2 surface equations here in GeoGebra Augmented Reality?

Quick Demo - Part 1

Quick Demo - Part 2

Modeling Another Lamp with 2 Surface Equations (Nighttime Modeling)