import vtkPolyData from '@kitware/vtk.js/Common/DataModel/PolyData';
import vtkActor from '@kitware/vtk.js/Rendering/Core/Actor';
import type { Types } from '@cornerstonejs/core';
export declare function addLine3DBetweenPoints(viewport: Types.IVolumeViewport, point1: Types.Point3, point2: Types.Point3, color?: [number, number, number], uid?: string, showHandles?: boolean): {
    actor: vtkActor | null;
    source: vtkPolyData | null;
};