Refactor Cutout Tool to Use World Space Edge Length

- Replaced the Mesh Detail parameter with a new Edge Length property to define cutout sampling in physical units.
- Introduced Minimum Relative Edge Length preference to control effective spacing based on the bounding box of the cutout content.
- Updated tests to validate the new edge length functionality and ensure consistent behavior across different resolutions and canvas sizes.
- Removed deprecated parameters and adjusted related properties to align with the new edge length implementation.
- Enhanced geometry sampling logic to utilize effective world spacing for both standard and fine outline modes.

src/anyimage/operators/cutout_tool/interaction.py

@@ -10,17 +10,6 @@ CUTOUT_SHAPE_BUTTONS = (
     ("DEPTH_SOLID", "SURFACE_NCURVE"),
 )
 
-CUTOUT_MESH_DETAIL_SPACING = {
-    "LOW": 32,
-    "MEDIUM": 16,
-    "HIGH": 8,
-    "ULTRA": 4,
-}
-
-
-def cutout_mesh_detail_spacing(mesh_detail):
-    return CUTOUT_MESH_DETAIL_SPACING[str(mesh_detail)]
-
 
 def _pie_button(
     pie,
@@ -30,7 +19,7 @@ def _pie_button(
     source_name,
     selection_path_json,
     generate_normal,
-    point_spacing,
+    edge_length,
     alpha_threshold,
     fine_outline,
     gesture,
@@ -44,7 +33,7 @@ def _pie_button(
     operator.selection_path_json = selection_path_json
     operator.shape = shape
     operator.generate_normal = generate_normal
-    operator.point_spacing = point_spacing
+    operator.edge_length = edge_length
     operator.alpha_threshold = alpha_threshold
     operator.fine_outline = fine_outline
     operator.gesture = gesture
@@ -61,7 +50,7 @@ def open_shape_pie(
     source_name = source_object.name
     selection_path_json = selection_path.to_json()
     settings = context.scene.anyimage_settings
-    point_spacing = cutout_mesh_detail_spacing(settings.cutout_mesh_detail)
+    edge_length = settings.cutout_edge_length
     ready = ai_ready()
     generate_normal = ready and bool(
         getattr(settings, "cutout_generate_normal", False)
@@ -81,7 +70,7 @@ def open_shape_pie(
                 source_name,
                 selection_path_json,
                 generate_normal,
-                point_spacing,
+                edge_length,
                 alpha_threshold,
                 fine_outline,
                 gesture,