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Graphics Interchange Format  |  1998-02-10  |  23KB  |  231x288  |  4-bit (16 colors)
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OCR: Invisible Portion Invisible Portion of Polygon B of Polygon A Span Split Point Visible Portion Visible Portion of Polygon A of Polygon B Viewpoint Figure I: Intersecting-span sorting. Polygons A and B are viewed from above.