octree/octree/octree_nn.h (3 lines):
	- line 50: // !!! TODO: support gpu stream for gpu functions !!!
	- line 186: // TODO: The performance can be improved via descent along the octree
	- line 203: // TODO: The implementation of align_forward_gpu, octree_pad_gpu, and


pytorch/cpp/octree_conv.cpp (2 lines):
	- line 182: // backward, TODO: add judgement here
	- line 242: // backward, TODO: add judgement here


caffe/src/caffe/util/octree.cpp (1 line):
	- line 704: // TODO: optimize! TODO: IF DEPTH > 8


pytorch/cpp/transform_points.cpp (1 line):
	- line 37: // TODO: Tensor.clone()


tensorflow/script/dataset.py (1 line):
	- line 105: return points # TODO: return the transformations


tensorflow/script/network_hrnet.py (1 line):
	- line 260: self.tensors['front/conv6'] = conv # TODO: add a resblock here?


caffe/include/caffe/layers/octree_base_conv_layer.hpp (1 line):
	- line 13: // TODO: use cudnn to speedup


pytorch/ocnn/octree2voxel.py (1 line):
	- line 21: # TODO: add octree2voxel module for other octree depth


caffe/src/caffe/layers/octree_interection_layer.cu (1 line):
	- line 43: // TODO: optimize octree storage to remove the usage of shuffled_key_kernel


caffe/src/caffe/layers/octree_set_feature_layer.cpp (1 line):
	- line 38: // TODO: add an interface in the caffe.proto in the future.


tensorflow/script/ocnn.py (1 line):
	- line 428: self.stype = stype  # TODO: support more optimizers


tensorflow/script/run_linear_cls.py (1 line):
	- line 47: # TODO: Check that whether we need a BN here