Method and apparatus for performing occlusion testing while exploiting frame to frame temporal coherence
US6476806B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Apr 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for performing occlusion testing in a computer graphics display system. The apparatus comprises logic configured to determine whether or not an object of a current image frame was occluded in a previous image frame. If a determination is made that the object was not occluded in the previous image frame, then the logic causes the object of the current image frame to be rendered to a frame buffer of the computer graphics display system. The current and previous image frames are each comprised of a plurality of objects, and the logic determines whether or not each of the objects of the current image frame were occluded in the previous image frame. The logic causes any objects of the current image frame that were not occluded in the previous image frame to be rendered to the frame buffer. Once all of the objects of the current image frame that were not occluded in the previous image frame have been rendered to the frame buffer, the logic determines whether or not any of the rendered objects of the current image frame are occluded. If the logic determines that a particular rendered object of the current image frame is not occluded, the logic determines…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.