Komprimierte Strahlrichtungsdaten in einem Strahlverfolgungssystem

Details

Veröffentlichungs-Nr.

EP3416136

Aktenzeichen

EP18173029

Anmeldetag

17. Mai 2018

Veröffentlichung

25. Mai 2022

Erteilung

25. Mai 2022

Rechtsraum

EP

IPC

G06T15/06G06T9/00

Abstract

Ray tracing systems process rays through a 3D scene to determine intersections between rays and geometry in the scene, for rendering an image of the scene. Ray direction data for a ray can be compressed, e.g. into an octahedral vector format. The compressed ray direction data for a ray may be represented by two parameters (u,v) which indicate a point on the surface of an octahedron. In order to perform intersection testing on the ray, the ray direction data for the ray is unpacked to determine x, y and z components of a vector to a point on the surface of the octahedron. The unpacked ray direction vector is an unnormalised ray direction vector. Rather than normalising the ray direction vector, the intersection testing is performed on the unnormalised ray direction vector. This avoids the processing steps involved in normalising the ray direction vector.

Anmelder

Firma

Imagination Technologies Limited

Land

🇬🇧 Großbritannien

Fachgebiete