Patent attributes
A boundary surface setting section sets the boundary surface for delimiting a permissible region that is the region which is located inside the real space and in which the user wearing a head-mounted display is permitted to exist and an impermissible region that is the region which is located inside the real space and in which the user is not permitted to exist. A display control section causes a portion or a whole of a virtual object representing the boundary surface to be displayed on the head-mounted display. The boundary surface includes a first boundary line having a first height and a second boundary line having a second height, and a portion or all of the first boundary line is different from the second boundary line.