公开(公告)号：US09390543B2

公开(公告)日：2016-07-12

申请号：US14163801

申请日：2014-01-24

Applicant: Nvidia Corporation

Inventor： Alexey Panteleev ,  Yury Uralsky ,  Evgeny Makarov ,  Henry Moreton ,  Sergey Bolotov ,  Eric B Lum

IPC: G06T15/08 ,  G06T15/00 ,  G06T15/20 ,  G06T15/80

CPC classification number: G06T15/005 ,  G06T15/08 ,  G06T15/20 ,  G06T15/80

Abstract: A graphics processing subsystem and method for computing a 3D clipmap. One embodiment of the subsystem includes: (1) a renderer operable to render a primitive surface representable by a 3D clipmap, (2) a geometry shader (GS) configured to select respective major-plane viewports for a plurality of clipmap levels, the major-plane viewports being sized to represent full spatial extents of the 3D clipmap relative to a render target (RT) for the plurality of clipmap levels, (3) a rasterizer configured to employ the respective major-plane viewports and the RT to rasterize a projection of the primitive surface onto a major plane corresponding to the respective major-plane viewports into pixels representing fragments of the primitive surface for each of the plurality of clipmap levels, and (4) a plurality of pixel shader (PS) instances configured to transform the fragments into respective voxels in the plurality of clipmap levels, thereby voxelizing the primitive surface.

Abstract translation: 用于计算3D剪贴图的图形处理子系统和方法。 子系统的一个实施例包括：（1）渲染器，其可操作以渲染由3D剪辑映射表示的原始表面;（2）几何着色器（GS），被配置为针对多个剪贴图级别选择相应的主平面视口，主要 平面视口的大小适于表示相对于多个剪贴图级别的渲染目标（RT）的3D剪贴图的完整空间范围，（3）被配置为使用相应的主平面视口和RT来光栅化投影的光栅化器 的原始表面到与相应主平面视口对应的主平面上，以代表代表多个剪贴图级别中的每一个的原始表面的片段的像素，以及（4）多个像素着色器（PS）实例，被配置为转换 将片段分割成多个剪贴图级别中的相应体素，从而使原始表面体素化。