API Reference > geometry-core > Curve > CurvePrimitive > fractionToFrenetFrame fractionToFrenetFrame Method Construct a frenet frame: origin at the point on the curve x axis is unit vector along the curve (tangent) y axis is perpendicular and in the plane of the osculating circle. z axis perpendicular to those. fractionToFrenetFrame(fraction: number, result?: Transform): Transform | undefined Parameter Type Description fraction number result Transform Returns - Transform | undefined Defined in core/geometry/src/curve/CurvePrimitive.ts Line 127 Last Updated: 13 June, 2024