发明名称 |
Apparatus for and of rendering 3d objects with parametric texture maps |
摘要 |
A graphics system that employs parametric texture maps. The graphics system renders surface features of a 3D object in a manner that is direction dependent but without the time consuming and expensive calculations involved in the evaluation of lighting equations on a per pixel basis. A parametric texture map holds a set of parameters that define a surface structure in a manner in which the appearance of the surface structure varies in response to a direction vector. The direction vector may be any user-defined vector including a light source vector or a half-angle vector. The parameters are those of a predetermined equation, the evaluation of which does not involve vector calculations. The equation may take any form including a polynomial equation or a non-polynomial equation. The graphic system renders a polygon with the surface structure using the equation.
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申请公布号 |
US6515674(B1) |
申请公布日期 |
2003.02.04 |
申请号 |
US20000528700 |
申请日期 |
2000.03.17 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
GELB DANIEL GEORGE;WOLTERS HANS JUERGEN;MALZBENDER THOMAS |
分类号 |
G06T15/04;(IPC1-7):G06T15/50 |
主分类号 |
G06T15/04 |
代理机构 |
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