Curvature Beziers: Making the Timeless Curve Respect Your Intent

Curvature Beziers – Improving on a timeless recipe

The bezier curve, a staple of CAD and graphics since 1959, has a hidden flaw: the common 'symmetric tangents' editing mode is mathematically irrelevant to smoothness. This post demonstrates that with a curvature comb, and proposes a better approach—curvature handles that directly control curvature, solved via a quartic equation. The result is a stable, intuitive editing experience that avoids cusps and popping, without breaking existing bezier-based tech.