摘要

Based on the intuitive method of geometrical envelope and topological mapping, the distribution of inflection points and singularities on a planar cubic hybrid hyperbolic polynomial curve segment and H-Bezier curve is discussed. We give the necessary and sufficient conditions for having one or two inflection points, or a loop, or a cusp, or none of the above points on the curves in terms of their control polygon. Finally, some examples on the distribution of inflection points and singularities for the cubic H-Bezier curve are presented.

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