API Reference > geometry-core > Bspline > KnotVector > spanIndexToLeftKnotIndex spanIndexToLeftKnotIndex Method Given a span index, return the index of the knot at its left. spanIndexToLeftKnotIndex(spanIndex: number): number Parameter Type Description spanIndex number index of span Returns - number Defined in bspline/KnotVector.ts Line 360 Last Updated: 11 June, 2024