API Reference > geometry-core > Polyface > PolyfaceBuilder > findOrAddNormalInGrowableXYZArray findOrAddNormalInGrowableXYZArray Method Announce point coordinates. The implementation is free to either create a new point or (if known) return index of a prior point with the same coordinates. findOrAddNormalInGrowableXYZArray(xyz: GrowableXYZArray, index: number, transform?: Transform, priorIndex?: number): number | undefined Parameter Type Description xyz GrowableXYZArray index number Index of the point in the linestring. transform Transform priorIndex number Returns - number | undefined Returns the point index in the Polyface. Defined in core/geometry/src/polyface/PolyfaceBuilder.ts Line 413 Last Updated: 13 June, 2024