text: module.exports = subtract
  
  /**
   * Subtracts vector b from vector a
   *
   * @param {vec4} out the receiving vector
   * @param {vec4} a the first operand
   * @param {vec4} b the second operand
   * @returns {vec4} out
   */
  function subtract (out, a, b) {
    out[0] = a[0] - b[0]
    out[1] = a[1] - b[1]
    out[2] = a[2] - b[2]
    out[3] = a[3] - b[3]
    return out
  }
  