Refactor comparison operations in geometry nodes

- Introduced a new `compare_node` function to streamline comparison operations across various geometry nodes.
- Replaced instances of mathematical comparison nodes with the new `compare_node` function in multiple files, enhancing code readability and maintainability.
- Updated related logic in cutout, depth surface, and image processing groups to utilize the new comparison method.
- Ensured consistent handling of boolean logic through the introduction of a `boolean_node` function for combining boolean inputs.

tests/tools/nodes/test_validity.py

@@ -1,12 +1,12 @@
-"""Verify point culling removes its dangling wire geometry."""
+"""Verify face culling removes the faces the depth mask excludes."""
 
 import bpy
 
-from tools.nodes.common.nodes import interface_socket
-from tools.nodes.common.validity import delete_invalid_points
+from tools.nodes.common.nodes import compare_node, interface_socket
+from tools.nodes.common.validity import delete_invalid_faces
 
 
-def test_point_culling_removes_wire_edges_without_removing_adjacent_surface():
+def test_face_culling_removes_invalid_faces_without_leaving_wire_geometry():
     bpy.ops.wm.read_factory_settings(use_empty=True)
     mesh = bpy.data.meshes.new("Two Quads")
     mesh.from_pydata([(0, 0, 0), (1, 0, 0), (2, 0, 0),
@@ -14,17 +14,14 @@ def test_point_culling_removes_wire_edges_without_removing_adjacent_surface():
                      [(0, 1, 4, 3), (1, 2, 5, 4)])
     obj = bpy.data.objects.new("Surface", mesh)
     bpy.context.collection.objects.link(obj)
-    group = bpy.data.node_groups.new("Point Culling", "GeometryNodeTree")
+    group = bpy.data.node_groups.new("Face Culling", "GeometryNodeTree")
     interface_socket(group, "Geometry", "INPUT", "NodeSocketGeometry")
     interface_socket(group, "Geometry", "OUTPUT", "NodeSocketGeometry")
     inlet = group.nodes.new("NodeGroupInput")
     outlet = group.nodes.new("NodeGroupOutput")
     index = group.nodes.new("GeometryNodeInputIndex")
-    invalid = group.nodes.new("ShaderNodeMath")
-    invalid.operation = "LESS_THAN"
-    invalid.inputs[1].default_value = 1
-    group.links.new(index.outputs[0], invalid.inputs[0])
-    geometry = delete_invalid_points(group, inlet.outputs["Geometry"], invalid.outputs[0])
+    invalid = compare_node(group, "LESS_THAN", index.outputs["Index"], 1, data_type="INT")
+    geometry = delete_invalid_faces(group, inlet.outputs["Geometry"], invalid)
     group.links.new(geometry, outlet.inputs["Geometry"])
     modifier = obj.modifiers.new("Cull", "NODES")
     modifier.node_group = group