API Reference > geometry-core > CartesianGeometry > Point2d > forwardLeftInterpolate forwardLeftInterpolate Method Interpolate at tangentFraction between this instance and point. Move by leftFraction along the xy perpendicular of the vector between the points. forwardLeftInterpolate(tangentFraction: number, leftFraction: number, point: Readonly<WritableXAndY>): Point2d Parameter Type Description tangentFraction number leftFraction number point Readonly<WritableXAndY> Returns - Point2d Defined in geometry3d/Point2dVector2d.ts Line 166 Last Updated: 11 June, 2024