Boundary display control device, boundary display control method, and program

A boundary display control method comprising:

• receiving, from one or more sensors in a real space, position data of the one or more sensors being associated with a real position of a user in a user-permitted region defined, at least in part, by a boundary surface that divides permitted region in the real space where the user is permitted to exist from a ted region in the real where the user is prohibited;
• using the position data, locating a virtual position of the user in a virtual space that has a one-to-one correspondence with the real space;
• identifying a part of the boundary surface as an approach portion based on the virtual position of the user;
• transmitting, via wireless or wired connection, a video signal to a head-mounted display to cause the head-mounted display to display a virtual object on the boundary surface, the virtual object representing the approach portion;
• and
• causing a presentation property of a partial region of the virtual object visibly to change based on a distance between the user and the approach portion.

A non-transitory computer readable medium having stored thereon a program that, when executed by a computer, causes the computer to perform a method, comprising:

• receiving, from one or more sensors in a real space, position data of the one or more sensors being associated with a real position of a user in a user-permitted region defined, at least in part, by a boundary surface that divides the user-permitted region in the real space where the user is permitted to exist from a user-unpermitted region in the real space where the user is prohibited;
• using the position data of the one or more sensors in proximity to one or more body part of the user, locating a virtual position of the user in a virtual space that has a one-to-one correspondence with the real space;
• identifying a part of the boundary surface as an approach portion based on the virtual position of the user;
• transmitting, via wireless or wired connection, a video signal to a head-mounted display to cause the head-mounted display to display a virtual object on the boundary surface, the virtual object representing the approach portion;
• and
• causing a presentation property of a partial region of the virtual object visibly to change based on a distance between the user and the approach portion.