API Reference > geometry-core > CartesianGeometry > Point2dArrayCarrier Point2dArrayCarrier Class Helper object to access members of a Point2d[] in geometric calculations. The collection holds only a reference to the actual array. The actual array may be replaced by the user as needed. When replaced, there is no cached data to be updated. Extends IndexedXYCollection Methods Name Description constructor(data: Point2d[]): Point2dArrayCarrier CAPTURE caller supplied array ... crossProductIndexIndexIndex(originIndex: number, indexA: number, indexB: number): undefined | number Return the cross product of vectors from point at originIndex to points at indexA and indexB crossProductXAndYIndexIndex(origin: Readonly<WritableXAndY>, indexA: number, indexB: number): undefined | number Return the cross product of vectors from origin to points at indexA and indexB getPoint2dAtCheckedPointIndex(index: number, result?: Point2d): undefined | Point2d Access by index, returning strongly typed Point2d getVector2dAtCheckedVectorIndex(index: number, result?: Vector2d): undefined | Vector2d Access by index, returning strongly typed Vector2d isValidIndex(index: number): boolean test if index is valid vectorIndexIndex(indexA: number, indexB: number, result?: Vector2d): undefined | Vector2d Return a vector from the point at indexA to the point at indexB vectorXAndYIndex(origin: Readonly<WritableXAndY>, indexB: number, result?: Vector2d): undefined | Vector2d Return a vector from given origin to point at indexB Properties Name Type Description data Point2d[] reference to array being queried. length Accessor ReadOnly number read-only property for number of XYZ in the collection. Defined in geometry3d/Point2dArrayCarrier.ts Line 21 Last Updated: 11 June, 2024