Allow export of positioning elements (only IfcGrid for now) See #911

src/ifcblenderexport/blenderbim/bim/prop.py

@@ -130,6 +130,7 @@ def getIfcProducts(self, context):
             'IfcSpatialElement',
             'IfcGroup',
             'IfcStructural',
+            'IfcPositioningElement',
             'IfcContext',
             'IfcAnnotation']])
     return products_enum

src/ifcblenderexport/blenderbim/bim/schema.py

@@ -17,6 +17,7 @@ class IfcSchema():
             'IfcSpatialElement',
             'IfcGroup',
             'IfcStructural',
+            'IfcPositioningElement',
             'IfcMaterialDefinition',
             'IfcParameterizedProfileDef',
             'IfcBoundaryCondition',

src/ifcblenderexport/blenderbim/bim/schema/IfcPositioningElement_IFC4.json

@@ -0,0 +1,77 @@
+{
+    "IfcGrid": {
+        "is_abstract": false,
+        "parent": "IfcProduct",
+        "attributes": [
+            {
+                "name": "GlobalId",
+                "type": "IfcGloballyUniqueId",
+                "is_enum": false,
+                "enum_values": []
+            },
+            {
+                "name": "Name",
+                "type": "IfcLabel",
+                "is_enum": false,
+                "enum_values": []
+            },
+            {
+                "name": "Description",
+                "type": "IfcText",
+                "is_enum": false,
+                "enum_values": []
+            },
+            {
+                "name": "ObjectType",
+                "type": "IfcLabel",
+                "is_enum": false,
+                "enum_values": []
+            },
+            {
+                "name": "PredefinedType",
+                "type": "IfcGridTypeEnum",
+                "is_enum": true,
+                "enum_values": [
+                    "RECTANGULAR",
+                    "RADIAL",
+                    "TRIANGULAR",
+                    "IRREGULAR",
+                    "USERDEFINED",
+                    "NOTDEFINED"
+                ]
+            }
+        ],
+        "complex_attributes": [
+            {
+                "name": "OwnerHistory",
+                "type": "IfcOwnerHistory",
+                "is_select": false,
+                "select_types": []
+            },
+            {
+                "name": "IsDeclaredBy",
+                "type": "IfcRelDefinesByObject",
+                "is_select": false,
+                "select_types": []
+            },
+            {
+                "name": "IsTypedBy",
+                "type": "IfcRelDefinesByType",
+                "is_select": false,
+                "select_types": []
+            },
+            {
+                "name": "ObjectPlacement",
+                "type": "IfcObjectPlacement",
+                "is_select": false,
+                "select_types": []
+            },
+            {
+                "name": "Representation",
+                "type": "IfcProductRepresentation",
+                "is_select": false,
+                "select_types": []
+            }
+        ]
+    }
+}

src/ifcblenderexport/getIfcElements.py

@@ -157,7 +157,8 @@ filename_filters = {
     'IfcParameterizedProfileDef_IFC4.json': ['IfcParameterizedProfileDef'],
     'IfcBoundaryCondition_IFC4.json': ['IfcBoundaryCondition'],
     'IfcElementType_IFC4.json': ['IfcElementType', 'IfcSpatialElementType'],
-    'IfcAnnotation_IFC4.json': ['IfcAnnotation']
+    'IfcAnnotation_IFC4.json': ['IfcAnnotation'],
+    'IfcPositioningElement_IFC4.json': ['IfcGrid'] # IfcPositioningElement in the future
 }
 
 for filename, filters in filename_filters.items():