feat: Implement weight cutout boundary smoothing for image depth cutout

- Added a new proposal for boundary smoothing in the weight cutout process, differentiating between Split edges and Outline smoothing requirements.
- Introduced a new capability `cutout-boundary-smoothing` to control smoothing strength and default values.
- Updated specifications to define the behavior of boundary-specific smoothing strength and default settings.
- Created tasks to verify the implementation of boundary behavior and asset updates.
- Developed comprehensive tests for depth symmetry and normal scaling to ensure expected behavior and performance.
- Introduced new attributes for normal mapping to facilitate persistent face attributes sharing between depth symmetry and image materials.
- Built a new node group for O Image Depth Symmetry, integrating the new smoothing capabilities and ensuring compatibility with existing workflows.

src/anyimage/operators/cutout_tool/object.py

@@ -5,10 +5,7 @@ from enum import StrEnum
 import bpy
 
 from ...common.depth import camera_depth_values, depth_uniform_scale
-from ...common.material import (
-    IMAGE_MATERIAL_NODE_GROUP_NAME,
-    create_image_material,
-)
+from ...common.material import create_image_material
 from ...common.object import (
     finalize_object_result,
     modifier_input_identifier,
@@ -18,7 +15,7 @@ from ...common.node import load_node_group
 from .depth_calibration import (
     DEFAULT_DEPTH_BASELINE,
     DEFAULT_DEPTH_DIRECTION,
-    depth_balloon_projection_parameters,
+    depth_symmetry_projection_parameters,
     metric_depth_reference,
     use_adaptive_depth_calibration,
 )
@@ -31,7 +28,6 @@ from .geometry import (
 )
 from .shape import (
     BALLOON_ATTRIBUTE_NAME,
-    NORMAL_SCALE_ATTRIBUTE_NAME,
     CUTOUT_NODE_GROUP_NAMES,
     DEPTH_CUTOUT_SHAPES,
 )
@@ -75,24 +71,6 @@ def load_cutout_node_group(shape):
     return load_node_group(CUTOUT_NODE_GROUP_NAMES[shape])
 
 
-def _connect_cutout_normal_scale(material):
-    nodes = material.node_tree.nodes
-    image_layer = next(
-        node
-        for node in nodes
-        if node.bl_idname == "ShaderNodeGroup"
-        and node.node_tree is not None
-        and node.node_tree.name == IMAGE_MATERIAL_NODE_GROUP_NAME
-    )
-    attribute = nodes.new("ShaderNodeAttribute")
-    attribute.attribute_type = "GEOMETRY"
-    attribute.attribute_name = NORMAL_SCALE_ATTRIBUTE_NAME
-    attribute.location = (-550.0, -250.0)
-    material.node_tree.links.new(
-        attribute.outputs["Fac"], image_layer.inputs["Normal Scale"]
-    )
-
-
 def create_shape_object(
     context,
     source_object,
@@ -143,7 +121,6 @@ def create_shape_object(
             scene=context.scene,
         )
         depth_reference = None
-        _connect_cutout_normal_scale(material)
         uniform_scale = None
         depth_direction = None
         if shape in DEPTH_CUTOUT_SHAPES:
@@ -161,7 +138,7 @@ def create_shape_object(
             )
             if not use_adaptive_depth_calibration(transparent_fraction):
                 depth_reference = DEFAULT_DEPTH_BASELINE
-                if shape == "DEPTH_BALLOON":
+                if shape == "DEPTH_SYMMETRY":
                     depth_direction = DEFAULT_DEPTH_DIRECTION
             elif shape == "DEPTH_SOLID":
                 depth_reference = metric_depth_reference(
@@ -170,7 +147,7 @@ def create_shape_object(
                     uniform_scale,
                 )
             else:
-                depth_reference, depth_direction = depth_balloon_projection_parameters(
+                depth_reference, depth_direction = depth_symmetry_projection_parameters(
                     base_shape.vertices,
                     base_shape.uv,
                     camera_depth,
@@ -222,7 +199,7 @@ def create_shape_object(
                 ),
                 value,
             )
-        if shape in {"FLAT", "SOLID", "DEPTH_SOLID"} and gesture == "POLYLINE":
+        if gesture == "POLYLINE" and shape != "DEPTH_SYMMETRY":
             set_modifier_input(
                 modifier,
                 modifier_input_identifier(node_group, "Mode"),
@@ -246,7 +223,7 @@ def create_shape_object(
                     modifier_input_identifier(node_group, name),
                     value,
                 )
-        if shape == "DEPTH_BALLOON":
+        if shape == "DEPTH_SYMMETRY":
             set_modifier_input(
                 modifier,
                 modifier_input_identifier(node_group, "Depth Direction"),