@woosh/meep-engine/src/core/geom/mat2/m2_determinant.js

Pure JavaScript game engine. Fully featured and production ready.

/**
 *
 * @param {number[]} a 2d matrix
 * @returns {number}
 */
export function m2_determinant(a) {
    return a[0] * a[3] - a[1] * a[2]
}