Refactor geometry node groups for image depth processing

- Introduced new utility functions in common nodes for evaluating fields and capturing attributes.
- Simplified volume field calculations in image depth cutout and panorama groups by utilizing new utility functions.
- Enhanced readability and maintainability of the image depth cutout and panorama node groups by removing redundant code and improving function usage.
- Adjusted default values for thickness and depth scale in image relief plane group for better user experience.
- Improved handling of geometry attributes and connections in image depth plane group to streamline processing.

tools/nodes/groups/image_relief_plane.py

@@ -31,12 +31,12 @@ def build_image_relief_plane_group(image_plane_group):
     subdivide.min_value = 0
     subdivide.max_value = 10
     thickness = _interface_socket(group, "Thickness", "INPUT", "NodeSocketFloat")
-    thickness.default_value = 0.0
+    thickness.default_value = 0.5
     thickness.min_value = 0.0
     thickness.subtype = "DISTANCE"
     thickness.description = "Fixed relief base thickness"
     depth_scale = _interface_socket(group, "Depth Scale", "INPUT", "NodeSocketFloat")
-    depth_scale.default_value = 1.0
+    depth_scale.default_value = 0.5
     depth_scale.min_value = 0.0
     options = group.interface.new_panel(name="Options", default_closed=True)
     base_plane_depth = _interface_socket(
@@ -129,10 +129,13 @@ def build_image_relief_plane_group(image_plane_group):
     has_thickness = _math(nodes, "GREATER_THAN")
     has_thickness.inputs[1].default_value = 1e-6
     links.new(shape_input.outputs["Thickness"], has_thickness.inputs[0])
+    flat_offset = _math(nodes, "MAXIMUM")
+    flat_offset.inputs[1].default_value = 0.0
+    links.new(full_offset.outputs[0], flat_offset.inputs[0])
     safe_offset = nodes.new("GeometryNodeSwitch")
     safe_offset.input_type = "FLOAT"
     links.new(has_thickness.outputs[0], safe_offset.inputs["Switch"])
-    links.new(full_offset.outputs[0], safe_offset.inputs["False"])
+    links.new(flat_offset.outputs[0], safe_offset.inputs["False"])
     links.new(limited_offset.outputs[0], safe_offset.inputs["True"])
 
     position = nodes.new("GeometryNodeInputPosition")