Raycasting system and method
US6525729B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of determining a z-buffer for a voxel data set, comprising first raycasting at least a first ray to determine a value for a first z-buffer element; and second raycasting at least a second ray to determine a value for a second z-buffer element, where said z-buffer element values are determined at different accuracies, which different accuracies are responsive to characteristics of the data set at a neighborhood of said rays. Preferably, said different accuracies are achieved by modifying the accuracy of determination of an intersection between a cast ray and a solid voxel of said data set. Alternatively or additionally, said different accuracies are achieved by modifying the density of raycasting into the z-buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.