copyVector2sArray method
Implementation
BufferAttribute copyVector2sArray(List<Vector2> vectors) {
  final array = this.array;
  int offset = 0;
  for (int i = 0, l = vectors.length; i < l; i++) {
    final vector = vectors[i];
    array[offset++] = vector.x;
    array[offset++] = vector.y;
  }
  return this;
}