Facebook Technologies, LLC

Jeremy Freeman

Larry Seiler

Alexander Nankervis

John Adrian Arthur Johnston

In one embodiment, a method includes determining a first time interval for rendering pixel values for a first portion of a display, where the first portion of the display is one of a plurality of portions of the display, accessing a representation of virtual objects in a virtual scene, and determining that the first time interval is insufficient for rendering pixel values for the first portion of the display based on the representation of virtual objects. The method further includes, for each of the portions of the display, determining a current viewpoint of a user, rendering, based on the current viewpoint of the user, pixel values for that portion of the display, and sending the rendered pixel values to be output by the display, where the rendered pixel values for the first portion of the display are rendered based on a simplified representation of virtual objects in the virtual scene.

Beam-racing fallbacks in a display engine

In one embodiment, a method includes, generating rays for casting into an artificial reality scene that includes one or more surfaces to determine whether the one or more surfaces are visible from a viewpoint. An origin and a trajectory of each ray are based on the viewpoint. The method includes applying a geometric transformation to the rays to modify their respective trajectory into the artificial reality scene. The geometric transformation is based on one or more distortion characteristics of a display system. The method includes determining, based on the modified trajectories of the rays, points of intersection of rays with the one or more surfaces in the artificial reality scene. The method includes providing, for display by the display system, color values generated based on the determined points of intersection.

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Kirkland, WA, United States of America

Jeremy Freeman