59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
from argparse import Namespace
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import torch
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from torch import nn
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from datasets.shapenet import ShapeNetPartSegDataset
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from models._point_net_2 import _PointNetCore
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from utils.module_mixins import BaseValMixin, BaseTrainMixin, BaseOptimizerMixin, BaseDataloadersMixin, DatasetMixin
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from utils.project_settings import GlobalVar
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class PointNet2(BaseValMixin,
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BaseTrainMixin,
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BaseOptimizerMixin,
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DatasetMixin,
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BaseDataloadersMixin,
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_PointNetCore
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):
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def __init__(self, hparams):
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super(PointNet2, self).__init__(hparams=hparams)
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# Dataset
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# =============================================================================
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self.dataset = self.build_dataset(ShapeNetPartSegDataset, collate_per_segment=True,
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npoints=self.params.npoints)
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# Model Paramters
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# =============================================================================
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# Additional parameters
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self.n_classes = len(GlobalVar.classes)
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# Modules
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self.point_net_core = ()
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self.lin3 = torch.nn.Linear(128, len(GlobalVar.classes))
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# Utility
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self.log_softmax = nn.LogSoftmax(dim=-1)
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def forward(self, data, **kwargs):
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"""
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data: a batch of input torch_geometric.data.Data type
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- torch_geometric.data.Data, as torch_geometric batch input:
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data.x: (batch_size * ~num_points, C), batch nodes/points feature,
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~num_points means each sample can have different number of points/nodes
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data.pos: (batch_size * ~num_points, 3)
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data.batch: (batch_size * ~num_points,), a column vector of graph/pointcloud
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idendifiers for all nodes of all graphs/pointclouds in the batch. See
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pytorch_gemometric documentation for more information
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"""
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sa0_out = (data.norm, data.pos, data.batch)
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tensor = super(PointNet2, self).forward(sa0_out)
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tensor = self.lin3(tensor)
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tensor = self.log_softmax(tensor)
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return Namespace(main_out=tensor)
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