import { AnyConstructor, NgtCommonHelper, NumberInput } from '@angular-three/core';
import * as THREE from 'three';
import * as i0 from "@angular/core";
export declare class NgtArrowHelper extends NgtCommonHelper<THREE.ArrowHelper> {
    static ngAcceptInputType_args: ConstructorParameters<typeof THREE.ArrowHelper> | undefined;
    set dir(dir: THREE.Vector3);
    set origin(origin: THREE.Vector3);
    set length(length: NumberInput);
    set headLength(headLength: NumberInput);
    set headWidth(headWidth: NumberInput);
    get helperType(): AnyConstructor<THREE.ArrowHelper>;
    protected get optionFields(): Record<string, boolean>;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgtArrowHelper, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<NgtArrowHelper, "ngt-arrow-helper", never, { "dir": "dir"; "origin": "origin"; "length": "length"; "headLength": "headLength"; "headWidth": "headWidth"; }, {}, never, ["*"], true>;
}
export declare class NgtArrowHelperModule {
    static ɵfac: i0.ɵɵFactoryDeclaration<NgtArrowHelperModule, never>;
    static ɵmod: i0.ɵɵNgModuleDeclaration<NgtArrowHelperModule, never, [typeof NgtArrowHelper], [typeof NgtArrowHelper]>;
    static ɵinj: i0.ɵɵInjectorDeclaration<NgtArrowHelperModule>;
}