src/Quaternion.js
function _fromAngleAxis(axis, angle) {
  var s = Math.sin(angle/2);
  var c = Math.cos(angle/2);

  return new _Quaternion(axis.x * s, axis.y * s, axis.z * s, c);
}
function _fromAngleAxis(axis, angle) {
  var s = Math.sin(angle/2);
  var c = Math.cos(angle/2);

  return new _Quaternion(axis.x * s, axis.y * s, axis.z * s, c);
}
function _fromAngleAxis ( axis , angle ) { var s = Math . sin ( angle / 2 ) ; var c = Math . cos ( angle / 2 ) ; return new _Quaternion ( axis . x * s , axis . y * s , axis . z * s , c ) ; }
Returns a quaternion for the given unit axis and angles in radians

@param {Vector3} axis: unit vector
@param {Number} angle: in radians
@returns {Quaternion} quaternion
Returns a quaternion for the given unit axis and angles in radians