NTOKO, NZUMBE-MESAPEC.E. Vandoni2015-09-292015-09-2919851017-4656https://doi.org/10.2312/eg.19851025Alternative blending functions are derived for a Bezier-type cubic curve touching the middle side of its control polygon. Three shape parameters are used which determine the point on the middle side of the control polygon where the curve touches the polygon. It is then shown that the blending functions proposed are generalizations of those proposed by Timmer.10.2312/eg.19851025