[Enhanchment] Fix unit test of EG3D Render for torch < 1.8.0

mmedit/models/editors/eg3d/renderer.py

@@ -8,6 +8,8 @@
 import torch.nn as nn
 import torch.nn.functional as F
 from mmengine.model import BaseModule
+from mmengine.utils import digit_version
+from mmengine.utils.dl_utils import TORCH_VERSION
 
 from ..stylegan3.stylegan3_modules import FullyConnectedLayer
 from .eg3d_utils import (get_ray_limits_box, inverse_transform_sampling,
@@ -431,7 +433,10 @@ def volume_rendering(self, colors: torch.Tensor, densities: torch.Tensor,
         composite_depth = torch.sum(weights * depths_mid, -2) / weight_total
 
         # clip the composite to min/max range of depths
-        composite_depth = torch.nan_to_num(composite_depth, float('inf'))
+        if digit_version(TORCH_VERSION) < digit_version('1.8.0'):
+            composite_depth[torch.isnan(composite_depth)] = float('inf')
+        else:
+            composite_depth = torch.nan_to_num(composite_depth, float('inf'))
         composite_depth = torch.clamp(composite_depth, torch.min(depths),
                                       torch.max(depths))
 

tests/test_models/test_editors/test_eg3d/test_camera.py

@@ -2,6 +2,7 @@
 import math
 from copy import deepcopy
 from unittest import TestCase
+from unittest.mock import patch
 
 import torch
 from mmengine.testing import assert_allclose
@@ -111,6 +112,14 @@ def test_sample_camera2world(self):
         cam2world = camera.sample_camera2world()
         self.assertEqual(cam2world.shape, (1, 4, 4))
 
+        mock_path = 'mmedit.models.editors.eg3d.camera.TORCH_VERSION'
+        with patch(mock_path, '1.6.0'):
+            print(torch.__version__)
+            cfg_ = deepcopy(self.default_cfg)
+            camera = BaseCamera(**cfg_)
+            cam2world = camera.sample_camera2world()
+            self.assertEqual(cam2world.shape, (1, 4, 4))
+
     def test_sample_in_range(self):
         cfg_ = deepcopy(self.default_cfg)
         cfg_['sampling_strategy'] = 'unknow'

tests/test_models/test_editors/test_eg3d/test_renderer.py

@@ -97,3 +97,14 @@ def test_forward(self):
                 ray_directions,
                 render_kwargs=render_kwargs)
             mock_func.assert_called_once()
+
+        # cover TORCH_VERSION < 1.8.0
+        mock_path = 'mmedit.models.editors.eg3d.renderer.TORCH_VERSION'
+        with patch(mock_path, '1.6.0'):
+            cfg_ = deepcopy(self.renderer_cfg)
+            renderer = EG3DRenderer(**cfg_)
+            renderer(
+                plane,
+                ray_origins,
+                ray_directions,
+                render_kwargs=render_kwargs)