ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,743,840, issued on Sept. 22, was assigned to Apple Inc. (Cupertino, Calif.).

"Path tracking for hardware-accelerated ray transforms" was invented by Luca O. Iuliano (Milton Keynes, Great Britain), Ali Rabbani Rankouhi (Bushey, Great Britain) and David J. Bermingham (Cambridge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques are disclosed relating to ray tracing, particularly for path tracking through a bounding volume hierarchy, according to some embodiments. In some embodiments, ray intersection accelerator circuitry traverses a bounding volume hierarchy that includes transform nodes at multiple levels. Ray transform accelerato...