math/Matrix3.js

3x3 matrix class for 3D math operations, part of the three.js library.

// Source: https://github.com/mrdoob/three.js | License: MIT | Copyright 2010-2026 three.js authors
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import { warnOnce } from '../utils.js';

/**
 * Represents a 3x3 matrix.
 *
 * A Note on Row-Major and Column-Major Ordering:
 *
 * The constructor and {@link Matrix3#set} method take arguments in
 * [row-major](https://en.wikipedia.org/wiki/Row-_and_column-major_order#Column-major_order)
 * order, while internally they are stored in the {@link Matrix3#elements} array in column-major order.
 * This means that calling:
 * ```js
 * const m = new THREE.Matrix();
 * m.set( 11, 12, 13,
 *        21, 22, 23,
 *        31, 32, 33 );
 * ```
 * will result in the elements array containing:
 * ```js
 * m.elements = [ 11, 21, 31,
 *      

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