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    Early release of resources in ray tracing hardware
    1.
    发明授权
    Early release of resources in ray tracing hardware 有权

    公开(公告)号：US11508112B2

    公开(公告)日：2022-11-22

    申请号：US16905844

    申请日：2020-06-18

    申请人： NVIDIA Corporation

    发明人： Gregory Muthler ,  John Burgess ,  Ronald Charles Babich, Jr. ,  William Parsons Newhall, Jr.

    IPC分类号： G06T15/06 ,  G06T17/10 ,  G06F9/48 ,  G06F9/50

    摘要： Techniques are disclosed for improving the throughput of ray intersection or visibility queries performed by a ray tracing hardware accelerator. Throughput is improved, for example, by releasing allocated resources before ray visibility query results are reported by the hardware accelerator. The allocated resources are released when the ray visibility query results can be stored in a compressed format outside of the allocated resources. When reporting the ray visibility query results, the results are reconstructed based on the results stored in the compressed format. The compressed format storage can be used for ray visibility queries that return no intersections or terminate on any hit ray visibility query. One or more individual components of allocated resources can also be independently deallocated based on the type of data to be returned and/or results of the ray visibility query.

    Hardware acceleration for ray tracing primitives that share vertices
    2.
    发明授权
    Hardware acceleration for ray tracing primitives that share vertices 有权

    公开(公告)号：US11450057B2

    公开(公告)日：2022-09-20

    申请号：US16901023

    申请日：2020-06-15

    申请人： NVIDIA Corporation

    发明人： Gregory Muthler ,  John Burgess ,  Ian Chi Yan Kwong

    IPC分类号： G06T15/06 ,  G06T15/08 ,  G06F9/50 ,  G06T17/20 ,  G06T17/10

    摘要： Enhanced techniques applicable to a ray tracing hardware accelerator for traversing a hierarchical acceleration structure and its underlying primitives are disclosed. For example, traversal speed is improved by grouping processing of primitives sharing at least one feature (e.g., a vertex or an edge) during ray-primitive intersection testing. Grouping the primitives for ray intersection testing can reduce processing (e.g., projections and transformations of primitive vertices and/or determining edge function values) because at least a portion of the processing results related to the shared feature in one primitive can be used in determine whether the ray intersects another primitive(s). Processing triangles sharing an edge can double the culling rate of the triangles in the ray/triangle intersection test without replicating the hardware.

    Enhanced techniques for traversing ray tracing acceleration structures
    3.
    发明授权
    Enhanced techniques for traversing ray tracing acceleration structures 有权

    公开(公告)号：US11380041B2

    公开(公告)日：2022-07-05

    申请号：US16898980

    申请日：2020-06-11

    申请人： NVIDIA Corporation

    发明人： Gregory Muthler ,  John Burgess

    IPC分类号： G06T15/06 ,  G06T15/08 ,  G06F9/50 ,  G06F9/30 ,  G06T17/00

    摘要： Enhanced techniques applicable to a ray tracing hardware accelerator for traversing a hierarchical acceleration structure are disclosed. For example, traversal efficiency is improved by combining programmable traversals based on ray operations with per-node static configurations that modify traversal behavior. The per-node static configurations enable creators of acceleration data structures to optimize for potential traversals without necessarily requiring detailed information about ray characteristics and ray operations used when traversing the acceleration structure. Moreover, by providing for selective exclusion of certain nodes using per-node static configurations, less memory is needed to express an acceleration structure that includes, for example, different geometric levels of details corresponding to a single object.