Update the docstring for try_get_projection_transform

Summary: Update the docstring for try_get_projection_transform on the API design.

Reviewed By: kjchalup

Differential Revision: D39227333

fbshipit-source-id: c9d0e625735d4972116d1f71865fb9b763e684de

pytorch3d/renderer/cameras.py

@@ -6,7 +6,7 @@
 
 import math
 import warnings
-from typing import List, Optional, Sequence, Tuple, Union
+from typing import Any, Dict, List, Optional, Sequence, Tuple, Union
 
 import numpy as np
 import torch
@@ -1851,12 +1851,15 @@ def get_screen_to_ndc_transform(
     return transform
 
 
-def try_get_projection_transform(cameras: CamerasBase, kwargs) -> Optional[Transform3d]:
+def try_get_projection_transform(
+    cameras: CamerasBase, cameras_kwargs: Dict[str, Any]
+) -> Optional[Transform3d]:
     """
-    Try block to get projection transform.
+    Try block to get projection transform from cameras and cameras_kwargs.
 
     Args:
-        cameras instance, can be linear cameras or nonliear cameras
+        cameras: cameras instance, can be linear cameras or nonliear cameras
+        cameras_kwargs: camera parameters to be passed to cameras
 
     Returns:
         If the camera implemented projection_transform, return the
@@ -1865,7 +1868,7 @@ def try_get_projection_transform(cameras: CamerasBase, kwargs) -> Optional[Trans
 
     transform = None
     try:
-        transform = cameras.get_projection_transform(**kwargs)
+        transform = cameras.get_projection_transform(**cameras_kwargs)
     except NotImplementedError:
         pass
     return transform