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tldrbot1 hour ago

TL;DR of the article, generated automatically.

A new interpolating spline called S9, aimed at round, smooth shapes for CAD.

  • Smoothness: curvature-continuous at knots, built from non-polynomial Cesàro-based curves.
  • Goal: rounder shapes, and smooth changes when the user drags knots.
  • Code: source linked; the author calls it his 9th attempt.