Add image selection refinement functionality with BEN2 integration

- Implemented viewport.py for handling 3D view projections, gestures, and overlay drawing.
- Created refine_image_selection.py to manage the refinement of gesture masks and output image bounds.
- Added selection module with refine_selection.py to process and crop images based on alpha channel visibility.
- Introduced __init__.py for selection module to expose refine_selection function.

src/anyimage/operators/cutout_tool/object.py

@@ -4,14 +4,16 @@ from enum import StrEnum
 
 import bpy
 
-from ...common.image_data import (
+from ...common.image import (
     color_data_name,
     image_rgba,
 )
-from ...common.depth_data import camera_depth_values, depth_uniform_scale
-from ...common.object import (
+from ...common.depth import camera_depth_values, depth_uniform_scale
+from ...common.material import (
     IMAGE_MATERIAL_NODE_GROUP_NAME,
     create_image_material,
+)
+from ...common.object import (
     finalize_object_result,
     modifier_input_identifier,
     set_modifier_input,
@@ -22,10 +24,10 @@ from .geometry import (
     DEFAULT_DEPTH_DIRECTION,
     crop_plane_bounds,
     cutout_cleanup_value,
-    cutout_point_spacing,
+    cutout_sampling_spacing,
     depth_balloon_projection_parameters,
     metric_depth_reference,
-    region_calibration,
+    selection_calibration,
     use_adaptive_depth_calibration,
     world_plane_metric,
 )
@@ -82,8 +84,8 @@ def _assign_float_point_attribute(mesh, name, values):
     attribute.data.foreach_set("value", np.asarray(values, dtype=np.float32))
 
 
-def _cropped_color_image(source_object, region_mask, source_rgba):
-    crop_bounds = region_mask.bounds
+def _cropped_color_image(source_object, selection_mask, source_rgba):
+    crop_bounds = selection_mask.bounds
     import numpy as np
 
     source = source_object.data
@@ -149,7 +151,7 @@ def create_shape_object(
     source_object,
     shape,
     mesh_resolution,
-    region_mask,
+    selection_mask,
     base_shape,
     *,
     depth_image=None,
@@ -163,7 +165,7 @@ def create_shape_object(
     normal_mode = NormalMode(normal_mode)
     bounds = crop_plane_bounds(
         source_object,
-        region_mask.bounds,
+        selection_mask.bounds,
         tuple(source_object.data.size),
     )
     crop_center = (
@@ -172,12 +174,12 @@ def create_shape_object(
     )
     world_metric, _world_z_scale = world_plane_metric(source_object.matrix_world)
     cleanup_value = cutout_cleanup_value(
-        cutout_point_spacing(source_object, mesh_resolution),
+        cutout_sampling_spacing(source_object, mesh_resolution),
         world_metric,
     )
     color_image = _cropped_color_image(
         source_object,
-        region_mask,
+        selection_mask,
         image_rgba(source_object.data) if source_rgba is None else source_rgba,
     )
     material = None
@@ -206,8 +208,8 @@ def create_shape_object(
             if depth_image is None or depth_metadata is None:
                 raise ValueError("Depth Shape requires a Depth texture and metadata")
             camera_depth, valid = camera_depth_values(depth_image)
-            calibration_valid, transparent_fraction = region_calibration(
-                region_mask, valid.shape
+            calibration_valid, transparent_fraction = selection_calibration(
+                selection_mask, valid.shape
             )
             calibration_valid &= valid
             uniform_scale = depth_uniform_scale(