API Reference > geometry-core > CartesianGeometry > Point2d > addForwardLeft addForwardLeft Method Starting at this point, move along vector by tangentFraction of the vector length, and to the left by leftFraction of the perpendicular vector length. addForwardLeft(tangentFraction: number, leftFraction: number, vector: Vector2d): Point2d Parameter Type Description tangentFraction number distance to move along the vector, as a fraction of vector leftFraction number distance to move perpendicular to the vector, as a fraction of the rotated vector vector Vector2d Returns - Point2d Defined in core/geometry/src/geometry3d/Point2dVector2d.ts Line 157 Last Updated: 15 June, 2021