added ruff for code review

blender/scripts/patch_projection.py

@@ -33,7 +33,11 @@ def build_patch_geometry(obj, cam, scene, depsgraph, uv_names, nx, ny, edge_samp
                 output[name]['mesh'].append(uvs[name])
             cache = {}
 
-            def visible(weights):
+            # ``cache`` and ``world`` are bound as defaults: ``cache`` is rebound
+            # for every loop triangle, and a late-bound closure would read the
+            # next triangle's cache (or the final triangle's, if a probe were
+            # deferred), yielding a wrong visibility answer per triangle.
+            def visible(weights, cache=cache, world=world):
                 nonlocal ray_count
                 key = tuple(round(w, 12) for w in weights)
                 if key in cache:
@@ -64,10 +68,10 @@ def build_patch_geometry(obj, cam, scene, depsgraph, uv_names, nx, ny, edge_samp
                     output[name]['patches'].append((i, j, polygon))
         print(f'Evaluated {len(mesh.loop_triangles)} loop triangles; {ray_count} visibility rays; '
               f'{len(output[uv_names[0]]["patches"])} local fragments per UV target')
-        print(f'Visibility sampling: seven probes per fragment; uniformly probed '
-              f'fragments are accepted or dropped whole, mixed boundary fragments '
-              f'refine to 1/4 cell or depth 6 and unresolved leaves are rejected. '
-              f'Sub-sample occluders may be missed; hit tolerance max(1e-7, distance*2e-5).')
+        print('Visibility sampling: seven probes per fragment; uniformly probed '
+              'fragments are accepted or dropped whole, mixed boundary fragments '
+              'refine to 1/4 cell or depth 6 and unresolved leaves are rejected. '
+              'Sub-sample occluders may be missed; hit tolerance max(1e-7, distance*2e-5).')
         return output
     finally:
         evaluated.to_mesh_clear()