feat: use project-style

Signed-off-by: Kaan Çolak <kaancolak95@gmail.com>

Author: kaancolak

projects/AutowareCenterPoint/README.md

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+from .pillar_encoder_autoware import PillarFeatureNetAutoware
+
+__all__ = [ 'PillarFeatureNetAutoware']

projects/AutowareCenterPoint/centerpoint/__init__.py

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+from typing import Optional, Tuple
+
+import torch
+from mmcv.cnn import build_norm_layer
+from mmcv.ops import DynamicScatter
+from torch import Tensor, nn
+
+from mmdet3d.registry import MODELS
+from mmdet3d.models.voxel_encoders.utils import PFNLayer, get_paddings_indicator
+@MODELS.register_module()
+class PillarFeatureNetAutoware(nn.Module):
+    """Pillar Feature Net.
+
+    The network prepares the pillar features and performs forward pass
+    through PFNLayers.
+
+    Args:
+        in_channels (int, optional): Number of input features,
+            either x, y, z or x, y, z, r. Defaults to 4.
+        feat_channels (tuple, optional): Number of features in each of the
+            N PFNLayers. Defaults to (64, ).
+        with_distance (bool, optional): Whether to include Euclidean distance
+            to points. Defaults to False.
+        with_cluster_center (bool, optional): [description]. Defaults to True.
+        with_voxel_center (bool, optional): [description]. Defaults to True.
+        voxel_size (tuple[float], optional): Size of voxels, only utilize x
+            and y size. Defaults to (0.2, 0.2, 4).
+        point_cloud_range (tuple[float], optional): Point cloud range, only
+            utilizes x and y min. Defaults to (0, -40, -3, 70.4, 40, 1).
+        norm_cfg ([type], optional): [description].
+            Defaults to dict(type='BN1d', eps=1e-3, momentum=0.01).
+        mode (str, optional): The mode to gather point features. Options are
+            'max' or 'avg'. Defaults to 'max'.
+        legacy (bool, optional): Whether to use the new behavior or
+            the original behavior. Defaults to True.
+    """
+
+    def __init__(self,
+                 in_channels: Optional[int] = 4,
+                 feat_channels: Optional[tuple] = (64,),
+                 with_distance: Optional[bool] = False,
+                 with_cluster_center: Optional[bool] = True,
+                 with_voxel_center: Optional[bool] = True,
+                 voxel_size: Optional[Tuple[float]] = (0.2, 0.2, 4),
+                 point_cloud_range: Optional[Tuple[float]] = (0, -40, -3, 70.4,
+                                                              40, 1),
+                 norm_cfg: Optional[dict] = dict(
+                     type='BN1d', eps=1e-3, momentum=0.01),
+                 mode: Optional[str] = 'max',
+                 legacy: Optional[bool] = True,
+                 use_voxel_center_z: Optional[bool] = True, ):
+        super(PillarFeatureNetAutoware, self).__init__()
+        assert len(feat_channels) > 0
+        self.legacy = legacy
+        self.use_voxel_center_z = use_voxel_center_z
+        if with_cluster_center:
+            in_channels += 3
+        if with_voxel_center:
+            in_channels += 2
+        if self.use_voxel_center_z:
+            in_channels += 1
+        if with_distance:
+            in_channels += 1
+        self._with_distance = with_distance
+        self._with_cluster_center = with_cluster_center
+        self._with_voxel_center = with_voxel_center
+        # Create PillarFeatureNet layers
+        self.in_channels = in_channels
+        feat_channels = [in_channels] + list(feat_channels)
+        pfn_layers = []
+        for i in range(len(feat_channels) - 1):
+            in_filters = feat_channels[i]
+            out_filters = feat_channels[i + 1]
+            if i < len(feat_channels) - 2:
+                last_layer = False
+            else:
+                last_layer = True
+            pfn_layers.append(
+                PFNLayer(
+                    in_filters,
+                    out_filters,
+                    norm_cfg=norm_cfg,
+                    last_layer=last_layer,
+                    mode=mode))
+        self.pfn_layers = nn.ModuleList(pfn_layers)
+
+        # Need pillar (voxel) size and x/y offset in order to calculate offset
+        self.vx = voxel_size[0]
+        self.vy = voxel_size[1]
+        self.vz = voxel_size[2]
+        self.x_offset = self.vx / 2 + point_cloud_range[0]
+        self.y_offset = self.vy / 2 + point_cloud_range[1]
+        self.z_offset = self.vz / 2 + point_cloud_range[2]
+        self.point_cloud_range = point_cloud_range
+
+    def forward(self, features: Tensor, num_points: Tensor, coors: Tensor,
+                *args, **kwargs) -> Tensor:
+        """Forward function.
+
+        Args:
+            features (torch.Tensor): Point features or raw points in shape
+                (N, M, C).
+            num_points (torch.Tensor): Number of points in each pillar.
+            coors (torch.Tensor): Coordinates of each voxel.
+
+        Returns:
+            torch.Tensor: Features of pillars.
+        """
+        features_ls = [features]
+        # Find distance of x, y, and z from cluster center
+        if self._with_cluster_center:
+            points_mean = features[:, :, :3].sum(
+                dim=1, keepdim=True) / num_points.type_as(features).view(
+                -1, 1, 1)
+            f_cluster = features[:, :, :3] - points_mean
+            features_ls.append(f_cluster)
+
+        # Find distance of x, y, and z from pillar center
+        dtype = features.dtype
+        if self._with_voxel_center:
+            center_feature_size = 3 if self.use_voxel_center_z else 2
+            if not self.legacy:
+                f_center = torch.zeros_like(features[:, :, :center_feature_size])
+                f_center[:, :, 0] = features[:, :, 0] - (
+                        coors[:, 3].to(dtype).unsqueeze(1) * self.vx +
+                        self.x_offset)
+                f_center[:, :, 1] = features[:, :, 1] - (
+                        coors[:, 2].to(dtype).unsqueeze(1) * self.vy +
+                        self.y_offset)
+                if self.use_voxel_center_z:
+                    f_center[:, :, 2] = features[:, :, 2] - (
+                            coors[:, 1].to(dtype).unsqueeze(1) * self.vz +
+                            self.z_offset)
+            else:
+                f_center = features[:, :, :center_feature_size]
+                f_center[:, :, 0] = f_center[:, :, 0] - (
+                        coors[:, 3].type_as(features).unsqueeze(1) * self.vx +
+                        self.x_offset)
+                f_center[:, :, 1] = f_center[:, :, 1] - (
+                        coors[:, 2].type_as(features).unsqueeze(1) * self.vy +
+                        self.y_offset)
+                if self.use_voxel_center_z:
+                    f_center[:, :, 2] = f_center[:, :, 2] - (
+                            coors[:, 1].type_as(features).unsqueeze(1) * self.vz +
+                            self.z_offset)
+            features_ls.append(f_center)
+
+        if self._with_distance:
+            points_dist = torch.norm(features[:, :, :3], 2, 2, keepdim=True)
+            features_ls.append(points_dist)
+
+        # Combine together feature decorations
+        features = torch.cat(features_ls, dim=-1)
+        # The feature decorations were calculated without regard to whether
+        # pillar was empty. Need to ensure that
+        # empty pillars remain set to zeros.
+        voxel_count = features.shape[1]
+        mask = get_paddings_indicator(num_points, voxel_count, axis=0)
+        mask = torch.unsqueeze(mask, -1).type_as(features)
+        features *= mask
+
+        for pfn in self.pfn_layers:
+            features = pfn(features, num_points)
+
+        return features.squeeze(1)