Number | Name | Date | Kind |
---|---|---|---|
3602702 | Warnock | Aug 1971 | |
3816726 | Sutherland et al. | Jun 1974 | |
4679040 | Yan | Jul 1987 | |
4780711 | Doumas | Oct 1988 | |
4811245 | Bunker et al. | Mar 1989 | |
4812988 | Duthuit et al. | Mar 1989 |
Entry |
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Newman et al. "Principles of Interactive Computer Graphics" (2nd ed.) McGraw-Hill, 1979, (pp. 376-379. |