import { Vector3 } from '../modeling/transform';
export type Vector2 = [number, number];
export interface MeshFaceData {
    vertices?: string[];
    uv?: Record<string, Vector2>;
    texture?: string | false | null;
    material?: string | null;
}
export declare class MeshFace {
    mesh: any;
    vertices: string[];
    uv: Record<string, Vector2>;
    texture: string | false | null;
    material: string | null;
    constructor(mesh: any, data?: MeshFaceData);
    extend(data: MeshFaceData): this;
    /**
     * Get element (mesh) this face belongs to
     */
    get element(): any;
    /**
     * Get texture for this face
     * Framework adapters would resolve actual texture object
     */
    getTexture(textures?: any[], format?: any): any | null | false;
    /**
     * Set texture for this face
     */
    setTexture(texture: string | false | null): this;
    /**
     * Get UV coordinates for a vertex
     */
    getUV(vertexKey: string): Vector2;
    /**
     * Set UV coordinates for a vertex
     */
    setUV(vertexKey: string, uv: Vector2): this;
    /**
     * Get center point of face
     */
    getCenter(): Vector3;
    /**
     * Get face normal
     */
    getNormal(normalize?: boolean, altTri?: boolean): Vector3;
    /**
     * Get sorted vertices (for quads, returns in order)
     */
    getSortedVertices(): string[];
    /**
     * Reset face to default state
     */
    reset(): this;
    /**
     * Check if face is valid (has at least 3 vertices)
     */
    isValid(): boolean;
    /**
     * Get number of vertices
     */
    get vertexCount(): number;
    /**
     * Check if face is a triangle
     */
    get isTriangle(): boolean;
    /**
     * Check if face is a quad
     */
    get isQuad(): boolean;
    getSaveCopy(textures?: any[], format?: any): any;
    getUndoCopy(): any;
    /**
     * Get edges of this face
     */
    getEdges(): Array<[string, string]>;
    /**
     * Check if face is concave
     */
    isConcave(): boolean;
    /**
     * Get angle between this face and another face (in degrees)
     */
    getAngleTo(otherFace: MeshFace): number;
    /**
     * Invert face normal by reversing vertex order
     */
    invert(): this;
    /**
     * Convert 3D point on face to UV coordinates
     * Uses barycentric interpolation
     */
    localToUV(point: Vector3): Vector2 | null;
    /**
     * Convert UV coordinates to 3D point on face
     */
    UVToLocal(uv: Vector2): Vector3 | null;
}
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