An Algorithm for Hidden Line Elimination The algorithm presented causes the elimination of hidden lines in the representation of a perspective view of concave and convex plane-faced objects on the picture plane. All the edges of the objects are considered sequentially, and all planes which hide every point of an edge are found. The computing time increases roughly as the square of the number of edges. The algorithm takes advantage of a reduced number of concave points and automatically recognizes if only one object with no concave points is considered. In this last case, the result is obtained in a much simpler way. CACM April, 1969 Galimberti, R. Montanari, U. hidden line elimination, back line recognition, three-dimensional representation, plane-faced objects, perspective view, machine rendering of solids, automatic drawing, displaying techniques, computer graphics, man/machine interaction, man/machine communication, computer-aided design 4.40 4.41 4.49 CA690402 JB February 17, 1978 4:44 PM 1915 5 1915 1915 5 1915 1915 5 1915 2004 5 1915 2687 5 1915 2692 5 1915 1686 6 1915 1741 6 1915 1915 6 1915 1915 6 1915 1915 6 1915 2004 6 1915