Discrete point coordinates, the profile curve of known according to the cubic spline interpolation algorithm to get the interpolation curve, and then according to the curvature calculation formula obtained curve curvature, now need to known the curve curvature as input (independent variables), strives for the curvature of the integral, and draw the integral curve of small white to come to consult everybody, thank you
Ps: one is the interpolation curve, figure 2 is the curve curvature chart