Migrate current callers to level-indexed refinement API

tests/validation/multigrid/test_refinement_multipatch.py

@@ -36,14 +36,14 @@ def level_fine(patch_set, windows):
     """Level-wide fine array with each patch window filled from `windows`."""
     out = np.full((9, *patch_set.fine_shape), np.nan, np.float32)
     for p, w in zip(patch_set.patches, windows):
-        y0, x0 = p.fine_level_origin
+        y0, x0 = p.fine_level_offset
         out[:, y0:y0 + p.fine_shape[0], x0:x0 + p.fine_shape[1]] = w
     return out
 
 
 def window(patch_set, index, fine):
     p = patch_set.patches[index]
-    y0, x0 = p.fine_level_origin
+    y0, x0 = p.fine_level_offset
     return fine[:, y0:y0 + p.fine_shape[0], x0:x0 + p.fine_shape[1]]
 
 
@@ -175,7 +175,7 @@ class MultipatchBodiesGPU(unittest.TestCase):
             for step in self.STEPS:
                 if switch is not None and step == 8:
                     for index, amplitude in switch:
-                        backend.set_jet_amplitude(index, amplitude)
+                        backend.set_jet_amplitude(index, amplitude, level=1)
                 backend.step(step - backend.step_count)
                 out.append(backend.download() + raw(backend))
         return out