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1. 发明专利

JP2010191991A Device or method for calculating surface normal vector 有权
标题翻译：用于计算表面正常矢量的装置或方法
公开(公告)号：JP2010191991A
公开(公告)日：2010-09-02
申请号：JP2010103076
申请日：2010-04-28
申请人： Imagination Technologies Ltd , イマジネイションテクノロジーズリミテッド
发明人： FENNEY SIMON , GIBSON CLIFFORD , RUSSELL JOHN , REDSHAW JONATHAN ALAN
IPC分类号： G06T15/00 , G06T17/30 , G06T17/20
CPC分类号： G06T17/30 , G06T17/20
摘要： PROBLEM TO BE SOLVED: To provide a method for converting parametric modeling data into polygon based data using recursive subdivision by a method for providing advanced calculation capability while minimizing use of a memory and memory bandwidth. SOLUTION: In three-dimensional graphic processing with a device for calculating a surface normal vector to the vertex of a surface patch which is used for modeling of an object to be shaded by a system, it is provided with: a means for subdividing the patch for generating a plurality of subpatches each of which has corner vertexes; a means for deriving a position of a control point to be required for deriving a surface normal to the vertex; a means for deriving a plurality of candidate tangent vectors at the vertex from the point of the control point; and a means for deriving the surface normals from the candidate tangent vectors. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于通过用于提供高级计算能力的方法的递归细分将参数建模数据转换为多边形数据，同时最小化存储器和存储器带宽的使用的方法。解决方案：在用于计算用于由系统遮蔽的对象的建模的表面贴片的顶点的表面法线向量的装置的三维图形处理中，提供有：用于细分所述补丁以产生每个具有角顶点的多个子对象; 用于导出用于导出与顶点垂直的表面所需要的控制点的位置的装置; 用于从所述控制点的点导出所述顶点处的多个候选切向量的装置; 以及用于从候选切线向量导出表面法线的方法。版权所有（C）2010，JPO＆INPIT

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