From 6b07aeb70303bda88f6e84ffaee066096edd29a3 Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Sun, 12 Jul 2020 10:19:22 +1000
Subject: [PATCH] Allow export of positioning elements (only IfcGrid for now)
 See #911

---
 src/ifcblenderexport/blenderbim/bim/prop.py   |  1 +
 src/ifcblenderexport/blenderbim/bim/schema.py |  1 +
 .../schema/IfcPositioningElement_IFC4.json    | 77 +++++++++++++++++++
 src/ifcblenderexport/getIfcElements.py        |  3 +-
 4 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 src/ifcblenderexport/blenderbim/bim/schema/IfcPositioningElement_IFC4.json

diff --git a/src/ifcblenderexport/blenderbim/bim/prop.py b/src/ifcblenderexport/blenderbim/bim/prop.py
index 3e70d095c7..940225bbc8 100644
--- a/src/ifcblenderexport/blenderbim/bim/prop.py
+++ b/src/ifcblenderexport/blenderbim/bim/prop.py
@@ -130,6 +130,7 @@ def getIfcProducts(self, context):
             'IfcSpatialElement',
             'IfcGroup',
             'IfcStructural',
+            'IfcPositioningElement',
             'IfcContext',
             'IfcAnnotation']])
     return products_enum
diff --git a/src/ifcblenderexport/blenderbim/bim/schema.py b/src/ifcblenderexport/blenderbim/bim/schema.py
index 4e40b0488d..4298b81042 100644
--- a/src/ifcblenderexport/blenderbim/bim/schema.py
+++ b/src/ifcblenderexport/blenderbim/bim/schema.py
@@ -17,6 +17,7 @@ class IfcSchema():
             'IfcSpatialElement',
             'IfcGroup',
             'IfcStructural',
+            'IfcPositioningElement',
             'IfcMaterialDefinition',
             'IfcParameterizedProfileDef',
             'IfcBoundaryCondition',
diff --git a/src/ifcblenderexport/blenderbim/bim/schema/IfcPositioningElement_IFC4.json b/src/ifcblenderexport/blenderbim/bim/schema/IfcPositioningElement_IFC4.json
new file mode 100644
index 0000000000..7702b8ffff
--- /dev/null
+++ b/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": []
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/src/ifcblenderexport/getIfcElements.py b/src/ifcblenderexport/getIfcElements.py
index 775d1ced5a..9f29c89c02 100644
--- a/src/ifcblenderexport/getIfcElements.py
+++ b/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():