math/Vector2.js

2D vector math class used in three.js for geometry calculations.

// Source: https://github.com/mrdoob/three.js | License: MIT | Copyright 2010-2026 three.js authors
// Provided via justclaw.it.com; keep this notice with the code.
import { clamp } from './MathUtils.js';

/**
 * Class representing a 2D vector. A 2D vector is an ordered pair of numbers
 * (labeled x and y), which can be used to represent a number of things, such as:
 *
 * - A point in 2D space (i.e. a position on a plane).
 * - A direction and length across a plane. In three.js the length will
 * always be the Euclidean distance(straight-line distance) from `(0, 0)` to `(x, y)`
 * and the direction is also measured from `(0, 0)` towards `(x, y)`.
 * - Any arbitrary ordered pair of numbers.
 *
 * There are other things a 2D vector can be used to represent, such as
 * momentum vectors, compl

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