An object-oriented graphic system performs a scan conversion process on a geometric figure with edges. The figure is represented by a graphic object which contains data describing the edges and a method for traversing the edges to outline the figure. The scan conversion is performed by loading the graphic...http://www.google.de/patents/US5471568?utm_source=gb-gplus-sharePatent US5471568 - Object-oriented apparatus and method for scan line conversion of graphic edges
