export declare const epsilon = 1e-12;
export declare const pi: number;
export declare const halfPi: number;
export declare const tau: number;
export declare const NEWTON_ITERATIONS = 4;
export declare const NEWTON_MIN_SLOPE = 0.001;
export declare const SUBDIVISION_PRECISION = 1e-7;
export declare const SUBDIVISION_MAX_ITERATIONS = 10;
export declare const pi2: number;
export type vec2 = [number, number] | Float32Array;
export type vec3 = [number, number, number] | Float32Array;
export type vec4 = [number, number, number, number] | Float32Array;
export type vec8 = [number, number, number, number, number, number, number, number] | Float32Array;
export type mat4 = [
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number
] | Float32Array;
export declare const abs: (x: number) => number;
export declare const atan2: (y: number, x: number) => number;
export declare const cos: (x: number) => number;
export declare const max: (...values: number[]) => number;
export declare const min: (...values: number[]) => number;
export declare const sin: (x: number) => number;
export declare const sqrt: (x: number) => number;
export declare const pow: (x: number, y: number) => number;
export declare function acos(x: number): number;
export declare function asin(x: number): number;
export declare function pointAt(x1: number | null | undefined, y1: number | null | undefined, x2: number | null | undefined, y2: number | null | undefined, t: number): {
    x: undefined | number;
    y: undefined | number;
};
export declare function lengthFromPointToLine(point: {
    x: number;
    y: number;
}, point1: {
    x: number;
    y: number;
}, point2: {
    x: number;
    y: number;
}): number;
export declare function crossProduct(dir1: vec2, dir2: vec2): number;
export declare function crossProductPoint(dir1: {
    x: number;
    y: number;
}, dir2: {
    x: number;
    y: number;
}): number;
export declare function dotProduct(a: number[] | Float32Array, b: number[] | Float32Array): number;
export declare function fuzzyEqualNumber(a: number, b: number): boolean;
export declare function fuzzyEqualVec(a: vec2, b: vec2): boolean;
export declare function fixPrecision(num: number, precision?: number): number;
export declare function getDecimalPlaces(n: number): number;
export declare function precisionAdd(a: number, b: number): number;
export declare function precisionSub(a: number, b: number): number;