rotateY method
Implementation
BufferGeometry rotateY(num angle) {
  // rotate geometry around world y-axis
  _bufferGeometrym1.makeRotationY(angle);
  applyMatrix4(_bufferGeometrym1);
  return this;
}
BufferGeometry rotateY(num angle) {
  // rotate geometry around world y-axis
  _bufferGeometrym1.makeRotationY(angle);
  applyMatrix4(_bufferGeometrym1);
  return this;
}