Following [KP07], we analyze surfaces arising as an infinite sequence of guided C2 surface rings. However, here we focus on constructions of too low a de gree to be curvature continuous also at the extraordinary point. To characterize shape a nd smoothness of such surfaces, we track a sequence of quadratic functions anchored in a fixed coordinate system. These ‘anchored osculating quadratics’ are easily computed in te rms of determinants of surface derivatives. Convergence of the sequence of… CONTINUE READING