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公开(公告)号：US11195326B2
公开(公告)日：2021-12-07
申请号：US16137830
申请日：2018-09-21
发明人： Ruijin Wu , Young In Yeo , Sagar S. Bhandare , Vineet Goel , Martin G. Sarov , Christopher J. Brennan
摘要： Described herein are techniques for improving the effectiveness of depth culling. In a first technique, a binner is used to sort primitives into depth bins. Each depth bin covers a range of depths. The binner transmits the depth bins to the screen space pipeline for processing in near-to-far order. Processing the near bins first results in the depth buffer being updated, allowing fragments for the primitives in the farther bins to be culled more aggressively than if the depth binning did not occur. In a second technique, a buffer is used to initiate two-pass processing through the screen space pipeline. In the first pass, primitives are sent down to update the depth block and are then culled. The fragments are processed normally in the second pass, with the benefit of the updated depth values.
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公开(公告)号：US20210407175A1
公开(公告)日：2021-12-30
申请号：US17008462
申请日：2020-08-31
摘要： A technique for performing ray tracing operations is provided. The technique includes reading descendant-shared type metadata for a non-leaf node of a bounding volume hierarchy; identifying one or more culling types for a ray-intersection test for a ray; and determining whether to treat the non-leaf node as not intersected based on whether the one or more culling types includes at least one type specified by the descendant-shared type metadata.
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3.发明申请公开(公告)号：US20200098169A1
公开(公告)日：2020-03-26
申请号：US16137830
申请日：2018-09-21
发明人： Ruijin Wu , Young In Yeo , Sagar S. Bhandare , Vineet Goel , Martin G. Sarov , Christopher J. Brennan
摘要： Described herein are techniques for improving the effectiveness of depth culling. In a first technique, a binner is used to sort primitives into depth bins. Each depth bin covers a range of depths. The binner transmits the depth bins to the screen space pipeline for processing in near-to-far order. Processing the near bins first results in the depth buffer being updated, allowing fragments for the primitives in the farther bins to be culled more aggressively than if the depth binning did not occur. In a second technique, a buffer is used to initiate two-pass processing through the screen space pipeline. In the first pass, primitives are sent down to update the depth block and are then culled. The fragments are processed normally in the second pass, with the benefit of the updated depth values.
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公开(公告)号：US20220189096A1
公开(公告)日：2022-06-16
申请号：US17118549
申请日：2020-12-10
摘要： Techniques for performing ray tracing operations are provided. The techniques include dividing a primitive of a scene to generate primitive portions; identifying, from the primitive portions, and based on an opacity texture, one or more opaque primitive portions and one or more invisible primitive portions; generating box nodes for a bounding volume hierarchy corresponding to the opaque primitive portions, but not the invisible primitive portions; and inserting the generated box nodes into the bounding volume hierarchy.
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公开(公告)号：US11238640B2
公开(公告)日：2022-02-01
申请号：US17008462
申请日：2020-08-31
摘要： A technique for performing ray tracing operations is provided. The technique includes reading descendant-shared type metadata for a non-leaf node of a bounding volume hierarchy; identifying one or more culling types for a ray-intersection test for a ray; and determining whether to treat the non-leaf node as not intersected based on whether the one or more culling types includes at least one type specified by the descendant-shared type metadata.
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