/**
 * Shared vector math utilities for ECSpresso bundles.
 * All functions are pure — they return new vectors, never mutate inputs.
 */
/**
 * A 2D vector with x and y components.
 */
export interface Vector2D {
    x: number;
    y: number;
}
/**
 * Create a Vector2D from x and y components.
 */
export declare function vec2(x: number, y: number): Vector2D;
/**
 * Return a zero vector {x: 0, y: 0}.
 */
export declare function vec2Zero(): Vector2D;
/**
 * Add two vectors component-wise.
 */
export declare function vec2Add(a: Vector2D, b: Vector2D): Vector2D;
/**
 * Subtract b from a component-wise.
 */
export declare function vec2Sub(a: Vector2D, b: Vector2D): Vector2D;
/**
 * Scale a vector by a scalar.
 */
export declare function vec2Scale(v: Vector2D, scalar: number): Vector2D;
/**
 * Negate a vector (flip both components).
 */
export declare function vec2Negate(v: Vector2D): Vector2D;
/**
 * Compute the dot product of two vectors.
 */
export declare function vec2Dot(a: Vector2D, b: Vector2D): number;
/**
 * Compute the 2D cross product (scalar z-component of the 3D cross product).
 */
export declare function vec2Cross(a: Vector2D, b: Vector2D): number;
/**
 * Compute the squared length of a vector. Avoids sqrt when only comparing magnitudes.
 */
export declare function vec2LengthSq(v: Vector2D): number;
/**
 * Compute the length (magnitude) of a vector.
 */
export declare function vec2Length(v: Vector2D): number;
/**
 * Return a unit vector in the same direction. Returns zero vector if input is zero-length.
 */
export declare function vec2Normalize(v: Vector2D): Vector2D;
/**
 * Compute the squared distance between two points. Avoids sqrt when only comparing.
 */
export declare function vec2DistanceSq(a: Vector2D, b: Vector2D): number;
/**
 * Compute the distance between two points.
 */
export declare function vec2Distance(a: Vector2D, b: Vector2D): number;
/**
 * Check if two vectors are approximately equal within an epsilon tolerance.
 */
export declare function vec2Equals(a: Vector2D, b: Vector2D, epsilon?: number): boolean;
/**
 * A 3D vector with x, y, and z components.
 */
export interface Vector3D {
    x: number;
    y: number;
    z: number;
}
/**
 * Create a Vector3D from x, y, and z components.
 */
export declare function vec3(x: number, y: number, z: number): Vector3D;
/**
 * Return a zero vector {x: 0, y: 0, z: 0}.
 */
export declare function vec3Zero(): Vector3D;
/**
 * Add two vectors component-wise.
 */
export declare function vec3Add(a: Vector3D, b: Vector3D): Vector3D;
/**
 * Subtract b from a component-wise.
 */
export declare function vec3Sub(a: Vector3D, b: Vector3D): Vector3D;
/**
 * Scale a vector by a scalar.
 */
export declare function vec3Scale(v: Vector3D, scalar: number): Vector3D;
/**
 * Negate a vector (flip all components).
 */
export declare function vec3Negate(v: Vector3D): Vector3D;
/**
 * Compute the dot product of two vectors.
 */
export declare function vec3Dot(a: Vector3D, b: Vector3D): number;
/**
 * Compute the cross product of two vectors.
 */
export declare function vec3Cross(a: Vector3D, b: Vector3D): Vector3D;
/**
 * Compute the squared length of a vector. Avoids sqrt when only comparing magnitudes.
 */
export declare function vec3LengthSq(v: Vector3D): number;
/**
 * Compute the length (magnitude) of a vector.
 */
export declare function vec3Length(v: Vector3D): number;
/**
 * Return a unit vector in the same direction. Returns zero vector if input is zero-length.
 */
export declare function vec3Normalize(v: Vector3D): Vector3D;
/**
 * Compute the squared distance between two points. Avoids sqrt when only comparing.
 */
export declare function vec3DistanceSq(a: Vector3D, b: Vector3D): number;
/**
 * Compute the distance between two points.
 */
export declare function vec3Distance(a: Vector3D, b: Vector3D): number;
/**
 * Check if two vectors are approximately equal within an epsilon tolerance.
 */
export declare function vec3Equals(a: Vector3D, b: Vector3D, epsilon?: number): boolean;