Viewport

A viewport is a concept in real-time 3D graphics that refers to the 2D rectangle used to project the 3D scene to the position of a virtual camera.

The viewport corresponds to the screen through which the user sees the virtual world.

It is an important concept for head-mounted displays in three-dimensional electronic interaction.

A viewport can be thought of as a view-surface.

In light field displays, the viewport is not a simple 2D surface.

In binocular displays, the viewport can be the same for both eyes.