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1. 发明申请

US20090153557A1 Horizon split ambient occlusion 有权
标题翻译：地平线分割环境遮挡
公开(公告)号：US20090153557A1
公开(公告)日：2009-06-18
申请号：US12002071
申请日：2007-12-14
申请人： Rouslan Dimitrov , Louis Bavoil , Miguel Sainz
发明人： Rouslan Dimitrov , Louis Bavoil , Miguel Sainz
IPC分类号： G06T15/50
CPC分类号： G06T15/506
摘要： The method includes receiving a plurality of graphics primitives for rendering at a GPU of a computer system and rendering graphics primitives into pixel parameters of the pixels of a display, wherein the parameters include pixel depth values and pixel normal values. For each pixel of the display, an ambient occlusion process is performed. The algorithm takes as input a ND-buffer containing pixel depth values and pixel normals. Based on the pixel 3-D position and the pixel normal vector, horizon heights are computed by sampling the ND-buffer and an occlusion term is computed for each pixel based on the horizon heights. Based on the pixel 3-D position, the pixel normal vector, a normal occlusion term is computed by sampling the ND-buffer above the horizon in multiple directions. An ambient occlusion illumination value is computed by combining the horizon occlusion term and the normal occlusion term.
摘要翻译：该方法包括接收用于在计算机系统的GPU处渲染的多个图形基元，并将图形基元渲染成显示器的像素的像素参数，其中参数包括像素深度值和像素正常值。对于显示器的每个像素，执行环境遮挡处理。该算法作为输入包含像素深度值和像素法线的ND缓冲器。基于像素3-D位置和像素法向矢量，通过对ND缓冲器进行采样来计算水平高度，并且基于水平高度为每个像素计算遮挡项。基于像素3-D位置，通过在多个方向上对地平线上方的ND缓冲器进行采样来计算像素法向量，正常遮挡项。通过组合水平遮挡项和正常遮挡项来计算环境遮挡照明值。

2. 发明授权

US08878849B2 Horizon split ambient occlusion 有权
标题翻译：地平线分割环境遮挡
公开(公告)号：US08878849B2
公开(公告)日：2014-11-04
申请号：US12002071
申请日：2007-12-14
申请人： Rouslan Dimitrov , Louis Bavoil , Miguel Sainz
发明人： Rouslan Dimitrov , Louis Bavoil , Miguel Sainz
IPC分类号： G06T15/50
CPC分类号： G06T15/506
摘要： The method includes receiving a plurality of graphics primitives for rendering at a GPU of a computer system and rendering graphics primitives into pixel parameters of the pixels of a display, wherein the parameters include pixel depth values and pixel normal values. For each pixel of the display, an ambient occlusion process is performed. The algorithm takes as input a ND-buffer containing pixel depth values and pixel normals. Based on the pixel 3-D position and the pixel normal vector, horizon heights are computed by sampling the ND-buffer and an occlusion term is computed for each pixel based on the horizon heights. Based on the pixel 3-D position, the pixel normal vector, a normal occlusion term is computed by sampling the ND-buffer above the horizon in multiple directions. An ambient occlusion illumination value is computed by combining the horizon occlusion term and the normal occlusion term.
摘要翻译：该方法包括接收用于在计算机系统的GPU处渲染的多个图形基元，并将图形基元渲染成显示器的像素的像素参数，其中参数包括像素深度值和像素正常值。对于显示器的每个像素，执行环境遮挡处理。该算法作为输入包含像素深度值和像素法线的ND缓冲器。基于像素3-D位置和像素法向矢量，通过对ND缓冲器进行采样来计算水平高度，并且基于水平高度为每个像素计算遮挡项。基于像素3-D位置，通过在多个方向上对地平线上方的ND缓冲器进行采样来计算像素法向量，正常遮挡项。通过组合水平遮挡项和正常遮挡项来计算环境遮挡照明值。

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