API Reference > geometry-core > Polyface > IndexedPolyfaceVisitor > tryGetDistanceParameter tryGetDistanceParameter Method Attempts to extract the distance parameter for the given vertex index on the current facet Returns the distance parameter as a point. Returns undefined on failure. tryGetDistanceParameter(index: number, result?: Point2d): undefined | Point2d Parameter Type Description index number result Point2d Returns - undefined | Point2d Defined in polyface/IndexedPolyfaceVisitor.ts Line 86 Last Updated: 29 November, 2022