Method of sketch profiling with spline curves for footwear design

The method of profiling sketches with spline curves with curvilinear guide paths is proposed in the work. The variants of possible combinations of types of spline sections are considered, all necessary variants of point positions for detection of a spline curve are given. The advantages of the developed method are the simplification of the design procedure of the proposed type of curves while providing more accurate representation of the real details, the mobility in controlling the shapes of curvilinear curves of sketch parts with a decrease in the order of the curve, including the curvature of different directions, which is in particular of first importance for all curves of the characteristic of shoe last sketches and conditional unfolding of the shoe last.