import { DrawOptions, IDrawer } from '../types';
export default class CircleDrawer implements IDrawer {
    private viewer;
    private Cesium;
    private handler;
    private entity;
    private positions;
    private _isDrawing;
    private currentRadius;
    constructor(CesiumInstance: any, viewerInstance: any);
    startDrawing(options: DrawOptions): void;
    private drawPreviewCircle;
    private drawFinalCircle;
    stopDrawing(): void;
    clear(): void;
}