/**
 * Math utilities for 3D transformations
 */
import type { Vec3, Mat4 } from './types.js';
export declare class MathUtils {
    /**
     * Create identity matrix
     */
    static identity(): Mat4;
    /**
     * Create perspective projection matrix
     */
    static perspective(fov: number, aspect: number, near: number, far: number): Mat4;
    /**
     * Create orthographic projection matrix (reverse-Z)
     * Uses same reverse-Z convention as perspective for consistent depth buffer behavior.
     * Depth range: near=1.0, far=0.0 (inverted)
     */
    static orthographicReverseZ(left: number, right: number, bottom: number, top: number, near: number, far: number): Mat4;
    /**
     * Create reverse-Z perspective projection matrix
     * Reverse-Z distributes depth precision more evenly, eliminating Z-fighting
     * at far distances. Depth range: near=1.0, far=0.0 (inverted)
     */
    static perspectiveReverseZ(fov: number, aspect: number, near: number, far: number): Mat4;
    /**
     * Create look-at view matrix
     */
    static lookAt(eye: Vec3, target: Vec3, up: Vec3): Mat4;
    /**
     * Multiply matrices
     */
    static multiply(a: Mat4, b: Mat4): Mat4;
    /**
     * Invert a 4x4 matrix
     */
    static invert(a: Mat4): Mat4 | null;
    /**
     * Transform vec3 by matrix (as point, w=1)
     */
    static transformPoint(m: Mat4, p: Vec3): Vec3;
    /**
     * Subtract vectors
     */
    static subtract(a: Vec3, b: Vec3): Vec3;
    /**
     * Normalize vector
     */
    static normalize(v: Vec3): Vec3;
    /**
     * Dot product
     */
    static dot(a: Vec3, b: Vec3): number;
    /**
     * Cross product
     */
    static cross(a: Vec3, b: Vec3): Vec3;
}
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