Add general CRUD operations for boundary conditions (from scene properties)

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_boundary_condition.py

@@ -1,21 +1,28 @@
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file
-        self.settings = {"connection": None}
+        self.settings = {"name": None, "connection": None, "ifc_class": "IfcBoundaryNodeCondition"}
         for key, value in settings.items():
             self.settings[key] = value
 
     def execute(self):
-        if self.settings["connection"].is_a("IfcRelConnectsStructuralMember"):
-            related_connection = self.settings["connection"].RelatedStructuralConnection
+        if self.settings["connection"]:
+            # assign boundary condition to a connection
+            if self.settings["connection"].is_a("IfcRelConnectsStructuralMember"):
+                related_connection = self.settings["connection"].RelatedStructuralConnection
+            else:
+                related_connection = self.settings["connection"]
+
+            if related_connection.is_a("IfcStructuralPointConnection"):
+                boundary_class = "IfcBoundaryNodeCondition"
+            elif related_connection.is_a("IfcStructuralCurveConnection"):
+                boundary_class = "IfcBoundaryEdgeCondition"
+            elif related_connection.is_a("IfcStructuralSurfaceConnection"):
+                boundary_class = "IfcBoundaryFaceCondition"
+
+            self.settings["connection"].AppliedCondition = self.file.create_entity(
+                boundary_class, Name=self.settings["name"]
+            )
         else:
-            related_connection = self.settings["connection"]
-
-        if related_connection.is_a("IfcStructuralPointConnection"):
-            boundary_class = "IfcBoundaryNodeCondition"
-        elif related_connection.is_a("IfcStructuralCurveConnection"):
-            boundary_class = "IfcBoundaryEdgeCondition"
-        elif related_connection.is_a("IfcStructuralSurfaceConnection"):
-            boundary_class = "IfcBoundaryFaceCondition"
-
-        self.settings["connection"].AppliedCondition = self.file.create_entity(boundary_class)
+            # add an orphan boundary condition
+            return self.file.create_entity(self.settings["ifc_class"], Name=self.settings["name"])

src/ifcopenshell-python/ifcopenshell/api/structural/data.py

@@ -50,6 +50,7 @@ class Data:
         cls.load_structural_load_groups()
         cls.load_structural_activities()
         cls.load_structural_loads()
+        cls.load_boundary_conditions()
         cls.is_loaded = True
 
     @classmethod
@@ -143,7 +144,6 @@ class Data:
 
     @classmethod
     def load_structural_connection(cls, product_id):
-        cls.boundary_conditions = {}
         cls.connects_structural_members = {}
 
         connection = cls._file.by_id(product_id)
@@ -205,6 +205,12 @@ class Data:
     def load_structural_load(cls, load):
         cls.structural_loads[load.id()] = load.get_info()
 
+    @classmethod
+    def load_boundary_conditions(cls):
+        cls.boundary_conditions = {}
+        for bc in cls._file.by_type("IfcBoundaryCondition"):
+            cls.load_boundary_condition(bc)
+
     @classmethod
     def load_connects_structural_activity(cls, rel):
         rel_data = rel.get_info()

src/ifcopenshell-python/ifcopenshell/api/structural/remove_structural_boundary_condition.py

@@ -1,13 +1,20 @@
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file
-        self.settings = {"connection": None}
+        self.settings = {"connection": None, "boundary_condition": None}
         for key, value in settings.items():
             self.settings[key] = value
 
     def execute(self):
-        if not self.settings["connection"].AppliedCondition:
-            return
-        if len(self.file.get_inverse(self.settings["connection"].AppliedCondition)) == 1:
-            self.file.remove(self.settings["connection"].AppliedCondition)
-        self.settings["connection"].AppliedCondition = None
+        if self.settings["connection"]:
+            # remove boundary condition from a connection
+            if not self.settings["connection"].AppliedCondition:
+                return
+            if len(self.file.get_inverse(self.settings["connection"].AppliedCondition)) == 1:
+                self.file.remove(self.settings["connection"].AppliedCondition)
+            self.settings["connection"].AppliedCondition = None
+        else:
+            # remove the boundary condition
+            for conn in self.file.get_inverse(self.settings["boundary_condition"]):
+                conn.AppliedCondition = None
+            self.file.remove(self.settings["boundary_condition"])