System and method for rendering a volumetric shadow
US8723865B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2010 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Jul 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for rendering a volumetric shadow includes defining a light source ray emanating from a light source, wherein the light source ray intersects a plurality of occluding primitives included within the scene. The method further includes computing an aggregate absorption function for the light source ray, whereby a per-primitive absorption function is computed for each of the plurality of occluding primitives intersecting the light source ray, and the resulting plurality of per-primitive absorption functions are summed to form an aggregate absorption function for the light source ray. A transmittance value is computed as a function of the aggregate absorption function, the transmittance value used to render the volumetric shadow within the scene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.