Number | Name | Date | Kind |
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5040130 | Chang et al. | Aug 1991 | |
5077679 | Williamson et al. | Dec 1991 | |
5304988 | Seto | Apr 1994 | |
5488692 | Karasick et al. | Jan 1996 | |
5509110 | Latham | Apr 1996 |
Entry |
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Foley et al., Computer Graphics: Principles and Practice, Second Edition, 1993, pp. 82-83 and 680-686. |