公开(公告)号：US12020367B2

公开(公告)日：2024-06-25

申请号：US17669430

申请日：2022-02-11

Applicant: NVIDIA Corporation

Inventor： Gregory Muthler ,  John Burgess ,  James Robertson ,  Magnus Anderson

IPC: G06T15/06 ,  G06F9/50 ,  G06T1/20 ,  G06T15/00 ,  G06T15/08 ,  G06T17/10

CPC classification number: G06T15/06 ,  G06F9/5027 ,  G06T1/20 ,  G06T15/005 ,  G06T15/08 ,  G06T17/10 ,  G06T2210/12

Abstract: Enhanced techniques applicable to a ray tracing hardware accelerator for traversing a hierarchical acceleration structure are disclosed. The traversal efficiency of such hardware accelerators are improved, for example, by transforming a ray, in hardware, from the ray's coordinate space to two or more coordinate spaces at respective points in traversing the hierarchical acceleration structure. In one example, the hardware accelerator is configured to transform a ray, received from a processor, from the world space to at least one alternate world space and then to an object space in hardware before a corresponding ray-primitive intersection results are returned to the processor. The techniques disclosed herein facilitate the use of additional coordinate spaces to orient acceleration structures in a manner that more efficiently approximate the space occupied by the underlying primitives being ray-traced.