import { UIProgressMaskFunction } from "./UIProgressMaskFunction";
/** Circular radial progress fill */
export declare class UIProgressMaskFunctionCircular extends UIProgressMaskFunction {
    private startAngleInternal;
    private inverseDirectionInternal;
    /**
     * Creates circular mask function.
     *
     * @param startAngle - Starting angle in radians
     * @param inverseDirection - Whether to fill counter-clockwise
     */
    constructor(startAngle?: number, inverseDirection?: boolean);
    /** Starting angle in radians */
    get startAngle(): number;
    /** Whether fill is counter-clockwise */
    get inverseDirection(): boolean;
    /** Starting angle in radians */
    set startAngle(value: number);
    /** Whether fill is counter-clockwise */
    set inverseDirection(value: boolean);
}