API Reference > geometry-core > Curve > IntegratedSpiral3d > fractionToCurvature fractionToCurvature Method Return the curvature at given fraction of the active interval ... The undefined result is to match the abstract class -- it cannot actually occur. fractionToCurvature(activeFraction: number): undefined | number Parameter Type Description activeFraction number Returns - undefined | number Defined in curve/spiral/IntegratedSpiral3d.ts Line 103 Last Updated: 11 June, 2024