import { BinaryIO } from '../common/BinaryIO.js';
import type { ArxVector3, TripleOf } from '../common/types.js';
/**
 * These are not bitwise flags, they cannot be combined
 *
 * @see https://github.com/arx/ArxLibertatis/blob/1.2.1/src/graphics/data/FTLFormat.h#L105
 */
export declare enum ArxFaceType {
    Flat = 0,
    Text = 1,
    DoubleSided = 2
}
/**
 * the default value of transval is 0
 *
 * @see https://github.com/arx/ArxLibertatis/blob/1.2.1/src/graphics/data/FTLFormat.h#L103
 */
export type ArxFace = {
    faceType: ArxFaceType;
    vertexIdx: TripleOf<number>;
    textureIdx: number;
    u: TripleOf<number>;
    v: TripleOf<number>;
    transval?: number;
    norm: ArxVector3;
};
export declare class Face {
    static readFrom(binary: BinaryIO<ArrayBufferLike>): ArxFace;
    static accumulateFrom(face: ArxFace): ArrayBuffer;
    static sizeOf(): number;
}