import * as Zappar from '@zappar/zappar';
import * as THREE from 'three';
/**
 * The features which may be filled with polygons.
 * @property fillMouth - If true, fills this face feature with polygons.
 * @property fillEyeLeft - If true, fills this face feature with polygons.
 * @property fillEyeRight - If true, fills this face feature with polygons.
 * @property fillNeck - If true, fills this face feature with polygons.
 */
export interface FaceBufferGeometryOptions {
    fillMouth?: boolean;
    fillEyeLeft?: boolean;
    fillEyeRight?: boolean;
    fillNeck?: boolean;
}
export declare class FaceBufferGeometry extends THREE.BufferGeometry {
    private _generator;
    private _hasSetIndices;
    private _hasSetUVs;
    private _vertices;
    private _verticesAttribute;
    private _normals;
    private _normalsAttribute;
    private _recalculateNormals;
    constructor();
    loadFullHeadSimplified(options?: FaceBufferGeometryOptions): Promise<void>;
    loadDefaultFace(options?: FaceBufferGeometryOptions): Promise<void>;
    loadDefault(): Promise<void>;
    private _updateIndices;
    private _updateUVs;
    /**
     * @ignore
     */
    get calculateNormals(): boolean;
    /**
     * @ignore
     */
    set calculateNormals(b: boolean);
    updateFromFaceAnchor(f: Zappar.FaceAnchor, mirror: boolean): void;
    updateFromIdentityExpression(identity: Float32Array, expression: Float32Array, mirrored: boolean): void;
}