API Reference > geometry-core > Bspline > InterpolationCurve3d > dispatchToGeometryHandler dispatchToGeometryHandler Method "double dispatch" call pattern. User code implements a GeometryHandler with specialized methods to handle LineSegment3d, Arc3d etc as relevant to its use case. Each such GeometryQuery class implements this method as a one-line method containing the appropriate call such as handler.handleLineSegment3d () This allows each type-specific method to be called without a switch or instanceof test. dispatchToGeometryHandler(handler: GeometryHandler): any Parameter Type Description handler GeometryHandler Returns - any Defined in bspline/InterpolationCurve3d.ts Line 220 Last Updated: 12 June, 2024