API Reference > geometry-core > ArraysAndInterfaces > GrowableXYArray > constructor constructor Method Construct a new GrowablePoint2d array. GrowableXYArray(numPoints: number = 8): GrowableXYArray Parameter Type Description numPoints number initial capacity. Returns - GrowableXYArray Defined in core/geometry/src/geometry3d/GrowableXYArray.ts Line 37 Last Updated: 15 June, 2021