Continuous Shading of Curved Surfaces
Gouraud, H.
Computers, IEEE Transactions on
Volume C-20, Issue 6, June 1971 Page(s): 623 - 629
Digital Object Identifier  
Summary: A procedure for computing shaded pictures of curved surfaces is presented. The surface is approximated by small polygons in order to solve easily the hidden-parts problem, but the shading of each polygon is computed so that discontinuities of shade are eliminated across the surface and a smooth appearance is obtained. In order to achieve speed efficiency, the technique developed by Watkins is used which makes possible a hardware implementation of this algorithm.

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