发明授权
- 专利标题: System and method for generating generalized displacement maps from mesostructure geometries
- 专利标题(中): 从介观结构几何生成广义位移图的系统和方法
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申请号: US10990142申请日: 2004-11-15
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公开(公告)号: US07310101B2公开(公告)日: 2007-12-18
- 发明人: Xi Wang , Xin Tong , Stephen Lin , Baining Guo , Heung-Yeung Shum
- 申请人: Xi Wang , Xin Tong , Stephen Lin , Baining Guo , Heung-Yeung Shum
- 申请人地址: US WA Redmond
- 专利权人: Microsoft Corporation
- 当前专利权人: Microsoft Corporation
- 当前专利权人地址: US WA Redmond
- 代理机构: Lyon & Harr, LLP
- 代理商 Mark A. Watson
- 主分类号: G09G5/00
- IPC分类号: G09G5/00 ; G06T15/20 ; G06T15/60 ; G06T17/00
摘要:
A “mesostructure renderer” uses pre-computed multi-dimensional “generalized displacement maps” (GDM) to provide real-time rendering of general non-height-field mesostructures on both open and closed surfaces of arbitrary geometry. In general, the GDM represents the distance to solid mesostructure along any ray cast from any point within a volumetric sample. Given the pre-computed GDM, the mesostructure renderer then computes mesostructure visibility jointly in object space and texture space, thereby enabling both control of texture distortion and efficient computation of texture coordinates and shadowing. Further, in one embodiment, the mesostructure renderer uses the GDM to render mesostructures with either local or global illumination as a per-pixel process using conventional computer graphics hardware to accelerate the real-time rendering of the mesostructures. Further acceleration of mesostructure rendering is achieved in another embodiment by automatically reducing the number of triangles in the rendering pipeline according to a user-specified threshold for acceptable texture distortion.