module.exports = squaredLength

/**
 * Calculates the squared length of a vec4
 *
 * @param {vec4} a vector to calculate squared length of
 * @returns {Number} squared length of a
 */
function squaredLength (a) {
  var x = a[0],
    y = a[1],
    z = a[2],
    w = a[3]
  return x * x + y * y + z * z + w * w
}