Update src/pytorch_kinematics/transforms/rotation_conversions.py

Co-authored-by: Tom Power <[email protected]>

Author: PeterMitrano

src/pytorch_kinematics/transforms/rotation_conversions.py

@@ -497,8 +497,8 @@ def tensor_axis_and_angle_to_matrix(axis, theta):
                        torch.stack([r10, r11, r12], -1),
                        torch.stack([r20, r21, r22], -1)], -2)
     batch_shape = axis.shape[:-1]
-    mat44 = torch.eye(4, device=axis.device, dtype=axis.dtype).repeat(*batch_shape, 1, 1)
-    mat44[..., :3, :3] = rot
+    mat44 = torch.cat((rot, torch.zeros(*batch_shape, 3, 1).to(axis)), -1)
+    mat44 = torch.cat((mat44, torch.tensor([0.0, 0.0, 0.0, 1.0]).expand(*batch_shape, 1, 4).to(axis)), -2)
     return mat44