API Reference > geometry-core > Curve > TransitionSpiral3d > _activeFractionInterval _activeFractionInterval Protected _activeFractionInterval: Segment1d Fractional interval for the "active" part of a containing spiral. (The radius, angle, and length conditions define a complete spiral, and some portion of it is "active") Defined in curve/spiral/TransitionSpiral3d.ts Line 72 Last Updated: 11 June, 2024