API Reference > geometry-core > Polyface > PolyfaceAuxData > isAlmostEqual isAlmostEqual MethodStatic class level almostEqual test, allowing either or both to be undefined at point of call. isAlmostEqual(left: PolyfaceAuxData | undefined, right: PolyfaceAuxData | undefined, tol?: number): boolean Parameter Type Description left PolyfaceAuxData | undefined right PolyfaceAuxData | undefined tol number Returns - boolean Defined in core/geometry/src/polyface/AuxData.ts Line 157 Last Updated: 13 June, 2024