import type { Vec3Array } from "@amodx/math";
export declare class GeometryNormals {
    static subtract(v1: Vec3Array, v2: Vec3Array): Vec3Array;
    static cross(v1: Vec3Array, v2: Vec3Array): Vec3Array;
    static scale(v: Vec3Array, scaleFactor: number): Vec3Array;
    static add(v1: Vec3Array, v2: Vec3Array): Vec3Array;
    static normalize(v: Vec3Array): Vec3Array;
    static getTriangleNormals(p1: Vec3Array, p2: Vec3Array, p3: Vec3Array): Vec3Array;
    static getQuadNormal(p1: Vec3Array, p2: Vec3Array, p3: Vec3Array, p4: Vec3Array): [n1: Vec3Array, n2: Vec3Array, n3: Vec3Array, n4: Vec3Array];
}