New IFC add node

src/ifcsverchok/__init__.py

@@ -31,6 +31,7 @@ def nodes_index():
         ("ifc.by_guid", "SvIfcByGuid"),
         ("ifc.by_type", "SvIfcByType"),
         ("ifc.by_query", "SvIfcByQuery"),
+        ("ifc.add", "SvIfcAdd"),
         ("ifc.select_blender_objects", "SvIfcSelectBlenderObjects"),
     ])]
 

src/ifcsverchok/nodes/ifc/add.py

@@ -0,0 +1,37 @@
+import bpy
+import ifcopenshell
+import ifcsverchok.helper
+from bpy.props import StringProperty
+from sverchok.node_tree import SverchCustomTreeNode
+from sverchok.data_structure import updateNode
+
+
+class SvIfcAdd(bpy.types.Node, SverchCustomTreeNode, ifcsverchok.helper.SvIfcCore):
+    bl_idname = 'SvIfcAdd'
+    bl_label = 'IFC Add'
+    file: StringProperty(name='file', update=updateNode)
+    entity: StringProperty(name='entity', update=updateNode)
+
+    def sv_init(self, context):
+        self.inputs.new('SvStringsSocket', 'file').prop_name = 'file'
+        self.inputs.new('SvStringsSocket', 'entity').prop_name = 'entity'
+        self.outputs.new('SvStringsSocket', 'file')
+        self.outputs.new('SvStringsSocket', 'entity')
+
+    def process(self):
+        self.sv_input_names = ['file', 'entity']
+        self.file_out = []
+        self.entity_out = []
+        super().process()
+        self.outputs['file'].sv_set([self.file_out])
+        self.outputs['entity'].sv_set([self.entity_out])
+
+    def process_ifc(self, file, entity):
+        self.entity_out.append(file.add(entity))
+        self.file_out.append(file)
+
+def register():
+    bpy.utils.register_class(SvIfcAdd)
+
+def unregister():
+    bpy.utils.unregister_class(SvIfcAdd)