API Reference > geometry-core > CartesianGeometry > Point2dArrayCarrier > vectorIndexIndex vectorIndexIndex Method Return a vector from the point at indexA to the point at indexB vectorIndexIndex(indexA: number, indexB: number, result?: Vector2d): undefined | Vector2d Parameter Type Description indexA number index of point within the array indexB number index of point within the array result Vector2d caller-allocated vector. Returns - undefined | Vector2d undefined if either index is out of bounds Defined in geometry3d/Point2dArrayCarrier.ts Line 66 Last Updated: 11 June, 2024