Precision Z-interpolation method and apparatus
US5542025A · kind A · utility
8Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1991 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Jan 16, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/405
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A precision Z-interpolator for use in an interactive graphics system multiplies the line slope by a value f.sub.S in computing the first Z ordinate value. This eliminates the offset error in Z inherent in previously known interpolators. For extremely large slopes, the slope is not used directly in the computations. Instead the value used is (Z.sub.E -Z.sub.S)/(1+f.sub.E /f.sub.S) (see FIG. 4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.