var vecNormalize = require('./normalize')
var vecScale = require('./scale')

module.exports = random

/**
 * Generates a random vector with the given scale
 *
 * @param {vec4} out the receiving vector
 * @param {Number} [scale] Length of the resulting vector. If ommitted, a unit vector will be returned
 * @returns {vec4} out
 */
function random (out, scale) {
  scale = scale || 1.0

  // TODO: This is a pretty awful way of doing this. Find something better.
  out[0] = Math.random()
  out[1] = Math.random()
  out[2] = Math.random()
  out[3] = Math.random()
  vecNormalize(out, out)
  vecScale(out, out, scale)
  return out
}