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1. 发明授权

US06525726B1 Method and apparatus for adaptive hierarchical visibility in a tiled three-dimensional graphics architecture 有权
标题翻译：用于平铺三维图形架构中的自适应分层可见性的方法和装置
公开(公告)号：US06525726B1
公开(公告)日：2003-02-25
申请号：US09432134
申请日：1999-11-02
申请人： Feng Xie , Michael J. Shantz
发明人： Feng Xie , Michael J. Shantz
IPC分类号： G06T1540
CPC分类号： G06T15/40
摘要： A data processing system providing high performance three-dimensional graphics includes at least one system processor, chipset core logic, a graphics processor, and a Z-buffer. In one embodiment an adaptive hierarchical visibility (AHV) method performs occlusion-culling in a tiled 3D graphics hardware architecture. Polygon bins for each tile are bucket-sorted in order of increasing depth Z. Polygon bins are rendered starting with the bin closest to the viewer. After some number of bins are rendered, a single layer, hierarchical Z-buffer (HZ) may be constructed from the Z-buffer thus far accumulated for the rendered bins, if it would be cost effective to do so. Subsequent bins are rendered by first testing their polygons against the HZ buffer to see if they are hidden. Also described are an integrated circuit for implementing the AHV algorithm, and a computer-readable medium storing a data structure for implementing the AHV method and apparatus.
摘要翻译：提供高性能三维图形的数据处理系统包括至少一个系统处理器，芯片组核心逻辑，图形处理器和Z缓冲器。在一个实施例中，自适应分层可见性（AHV）方法在平铺的3D图形硬件体系结构中执行遮挡剔除。每个瓷砖的多边形料仓按照增加深度Z的顺序进行铲斗分类。多边形仓从最接近查看器的料仓开始。在渲染一些数量的存储区之后，可以从Z缓冲区构建单层层次化Z缓冲区（HZ），以便如此才能实现这样做成本有效。通过首先测试它们对HZ缓冲区的多边形来查看它们是否被隐藏，从而渲染后续的区块。还描述了用于实现AHV算法的集成电路和存储用于实现AHV方法和装置的数据结构的计算机可读介质。

2. 发明授权

US5125073A Method and apparatus for adaptive forward differencing in the rendering of curves and surfaces 失效
标题翻译：在曲线和表面渲染中自适应前向差异的方法和装置
公开(公告)号：US5125073A
公开(公告)日：1992-06-23
申请号：US433430
申请日：1989-11-08
申请人： Sheue-Ling Lien , Michael J. Shantz , Serdar Ergene , Vaughan R. Pratt , Jerald R. Evans
发明人： Sheue-Ling Lien , Michael J. Shantz , Serdar Ergene , Vaughan R. Pratt , Jerald R. Evans
IPC分类号： G06T17/30 , G06T11/20 , G06T15/00 , G09G5/20
CPC分类号： G06T11/203 , G09G5/20
摘要： An adaptive forward differencing apparatus wherein, when rendering curves, calculated x, y values are increased or decreased in order to create values which correspond to the next pixel of the display CRT, such that curves of substantially one pixel increments are continuously and uniformly generated. The apparatus also provides circuitry for generating coordinates of display elements which approximate an ideal vector and to define curves, vectors or objects within maximum and minimum coordinates of the CRT display. The present invention also provides efficient circuitry for computing the value of 1/w of the homogenous coordinate w.
摘要翻译：一种自适应正向差分装置，其中，当渲染曲线时，计算的x，y值被增加或减小，以便产生对应于显示CRT的下一个像素的值，使得基本上一个像素增量的曲线连续且均匀地产生。该装置还提供用于产生近似理想矢量并且在CRT显示器的最大和最小坐标内定义曲线，矢量或对象的显示元件的坐标的电路。本发明还提供了用于计算均匀坐标w的1 / w值的有效电路。

3. 发明授权

US5063375A Method and apparatus for shading images 失效
标题翻译：阴影图像的方法和装置
公开(公告)号：US5063375A
公开(公告)日：1991-11-05
申请号：US409262
申请日：1989-09-18
申请人： Sheue-Ling Lien , Michael J. Shantz , Susan E. Carrie , Jim V. Loo , David Elrod
发明人： Sheue-Ling Lien , Michael J. Shantz , Susan E. Carrie , Jim V. Loo , David Elrod
IPC分类号： G06T15/50 , G06T15/83 , G06T15/87
CPC分类号： G06T15/50 , G06T15/83 , G06T15/87
摘要： The present invention provides unique methods and apparatus for shading curves, polygons and patches, implementing Phong, Gouraud and other shading techniques in the rendering of images on a cathode ray tube or other display device. The present invention also includes a unique method and apparatus for shading patches by rendering a series of adjacent curves such that no pixel gaps exist between each rendered curve.
摘要翻译：本发明提供了用于阴影曲线，多边形和贴片的独特方法和装置，在阴影射线管或其它显示装置上的图像渲染中实现Phong，Gouraud和其他着色技术。本发明还包括用于通过渲染一系列相邻曲线来遮蔽补片的独特方法和装置，使得在每个渲染曲线之间不存在像素间隙。

4. 发明授权

US4855935A Method and apparatus for rendering vectors using bresenham parameters 失效
标题翻译：使用bresenham参数渲染向量的方法和装置
公开(公告)号：US4855935A
公开(公告)日：1989-08-08
申请号：US47693
申请日：1987-05-08
申请人： Sheue-Ling Lien , Michael J. Shantz , Jerald R. Evans , Serdar Ergene , Susan E. Carrie
发明人： Sheue-Ling Lien , Michael J. Shantz , Jerald R. Evans , Serdar Ergene , Susan E. Carrie
IPC分类号： G06T17/30 , G06T11/20 , G06T15/00 , G09G5/20
CPC分类号： G09G5/20
摘要： An adaptive forward differencing apparatus wherein, when rendering curves, calculated x, y values are increased or decreased in order to create values which correspond to the next pixel of the display CRT, such that curves of substantially one pixel increments are continuously and uniformly generated. The apparatus of the present invention also provides circuitry for generating coordinates of display elements which approximate an ideal vector and to define curves, vectors or objects within maximum and minimum coordinates of the CRT display. The present invention also provides efficient circuitry for computing the value of 1/w of the homogenous coordinate w.
摘要翻译：一种自适应正向差分装置，其中，当渲染曲线时，计算的x，y值被增加或减小，以便产生对应于显示CRT的下一个像素的值，使得基本上一个像素增量的曲线连续且均匀地产生。本发明的装置还提供用于产生近似理想矢量并且在CRT显示器的最大和最小坐标内定义曲线，矢量或对象的显示元件的坐标的电路。本发明还提供了用于计算均匀坐标w的1 / w值的有效电路。

5. 发明授权

US6130680A Method and apparatus for multi-level demand caching of textures in a graphics display device 失效
标题翻译：用于在图形显示装置中多层次需求缓存纹理的方法和装置
公开(公告)号：US6130680A
公开(公告)日：2000-10-10
申请号：US982029
申请日：1997-12-01
申请人： Michael Brian Cox , Michael J. Shantz
发明人： Michael Brian Cox , Michael J. Shantz
IPC分类号： G06F12/08 , G06T1/60 , G06T11/40 , G06F13/00
CPC分类号： G06F12/0875 , G06F12/0897 , G06T1/60
摘要： A computer graphics system for caching textures includes an L3 memory, an L2 cache, and an L1 cache for storing such textures and also includes a graphics accelerator (GA) for mapping these stored textures onto primitives for graphics display. The L3 memory, which has the largest capacity also has the slowest retrieval speed, while the L1 cache has the smallest capacity and the quickest retrieval speed. The textures are divided into a plurality of L2 texture blocks and each L2 texture block is subdivided into a plurality of L1 sub-blocks. During its rendering process, the GA searches the L1 cache for a particular L1 sub-block that is to be applied to a primitive. If such L1 sub-block is stored within the L1 cache, the GA will extract the desired texels (i.e., texture pixels) from the L1 sub-block and apply such texels to the primitive. If the L1 sub-block is not located in the L1 cache, the GA will search the L2 cache for the L1 sub-block. If it is found in the L2 cache, the GA will load the L1 sub-block to the L1 cache. However, if the L1 sub-block is not found within the L2 cache, the GA will load the L1 sub-block from the L3 memory to both the L1 and L2 caches. Advantageously, when the GA requires such L1 sub-block again, the GA will have a speedier access to the L1 sub-block via the L1 and L2 caches.
摘要翻译：用于缓存纹理的计算机图形系统包括L3存储器，L2高速缓存和用于存储这种纹理的L1高速缓存，并且还包括用于将这些存储的纹理映射到用于图形显示的基元上的图形加速器（GA）。具有最大容量的L3存储器的检索速度最慢，而L1缓存具有最小的容量和最快的检索速度。纹理分为多个L2纹理块，每个L2纹理块被细分为多个L1子块。在其渲染过程中，GA在L1高速缓存中搜索要应用于原语的特定L1子块。如果这样的L1子块被存储在L1高速缓存中，则GA将从L1子块中提取期望的纹理像素（即，纹理像素），并将这样的纹素应用于原始图像。如果L1子块不位于L1高速缓存中，则GA将搜索L2高速缓存用于L1子块。如果在L2高速缓存中找到，GA将把L1子块加载到L1高速缓存。然而，如果在L2高速缓存中没有找到L1子块，则GA将L1 L3子块从L3存储器加载到L1和L2高速缓存。有利地，当GA再次需要这样的L1子块时，GA将通过L1和L2高速缓存更快地访问L1子块。

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