发明名称 |
Omnidirectional shadow texture mapping |
摘要 |
An invention is provided for rendering using an omnidirectional light. A shadow cube texture map having six cube faces centered by a light source is generated. Each cube face comprises a shadow texture having depth data from a perspective of the light source. In addition, each cube face is associated with an axis of a three-dimensional coordinate system. For each object fragment rendered from the camera's perspective a light-to-surface vector is defined from the light source to the object fragment, and particular texels within particular cube faces are selected based on the light-to-surface vector. The texel values are tested against a depth value computed from the light to surface vector. The object fragment is textured as in light or shadow according to the outcome of the test.
|
申请公布号 |
US6876362(B1) |
申请公布日期 |
2005.04.05 |
申请号 |
US20020193388 |
申请日期 |
2002.07.10 |
申请人 |
NVIDIA CORPORATION |
发明人 |
NEWHALL, JR. WILLIAM P.;KILGARD MARK J. |
分类号 |
G06T15/04;G06T15/60;(IPC1-7):G06T15/00 |
主分类号 |
G06T15/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|