reorganized configure_optical_flows to not initialize for null flow w…

…eight

src/pytti/LossAug/LossOrchestratorClass.py

@@ -125,22 +125,31 @@ def configure_stabilization_augs(img, init_image_pil, params, loss_augs):
 def configure_optical_flows(img, params, loss_augs):
     logger.debug(params.device)
     _device = params.device
+
+    # this shouldn't be in this function based on the name.
+    # other loss augs
+    if params.smoothing_weight != 0:
+        loss_augs.append(
+            TVLoss(weight=params.smoothing_weight)
+        )  # , device=params.device))
+
     optical_flows = []
     if params.animation_mode == "Video Source":
         if params.flow_stabilization_weight == "":
             params.flow_stabilization_weight = "0"
         # TODO: if flow stabilization weight is 0, shouldn't this next block just get skipped?
-
-        for i in range(params.flow_long_term_samples + 1):
-            optical_flow = OpticalFlowLoss(
-                comp=torch.zeros(1, 1, 1, 1, device=_device),  # ,device=DEVICE)
-                weight=params.flow_stabilization_weight,
-                name=f"optical flow stabilization (frame {-2**i}) (direct)",
-                image_shape=img.image_shape,
-                device=_device,
-            )  # , device=device)
-            optical_flow.set_enabled(False)
-            optical_flows.append(optical_flow)
+        if params.flow_stabilization_weight != "0":
+            # TO DO: if weight is parameterized, need to do a parameteric evaluation here.
+            for i in range(params.flow_long_term_samples + 1):
+                optical_flow = OpticalFlowLoss(
+                    comp=torch.zeros(1, 1, 1, 1, device=_device),  # ,device=DEVICE)
+                    weight=params.flow_stabilization_weight,
+                    name=f"optical flow stabilization (frame {-2**i}) (direct)",
+                    image_shape=img.image_shape,
+                    device=_device,
+                )  # , device=device)
+                optical_flow.set_enabled(False)
+                optical_flows.append(optical_flow)
 
     elif params.animation_mode == "3D" and params.flow_stabilization_weight not in [
         "0",
@@ -158,13 +167,6 @@ def configure_optical_flows(img, params, loss_augs):
 
     loss_augs.extend(optical_flows)
 
-    # this shouldn't be in this function based on the name.
-    # other loss augs
-    if params.smoothing_weight != 0:
-        loss_augs.append(
-            TVLoss(weight=params.smoothing_weight)
-        )  # , device=params.device))
-
     return img, loss_augs, optical_flows