Moving grid axes are now synchronised automatically

src/blenderbim/blenderbim/bim/export_ifc.py

@@ -119,6 +119,8 @@ class IfcExporter:
     def sync_object_placement(self, obj):
         blender_matrix = np.array(obj.matrix_world)
         element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+        if element.is_a("IfcGridAxis"):
+            return self.sync_grid_axis_object_placement(obj, element)
         if not hasattr(element, "ObjectPlacement"):
             return
         ifc_matrix = ifcopenshell.util.placement.get_local_placement(element.ObjectPlacement)
@@ -139,6 +141,14 @@ class IfcExporter:
         if not np.allclose(ifc_matrix, blender_matrix, atol=0.0001):
             blenderbim.core.geometry.edit_object_placement(tool.Ifc, tool.Surveyor, obj=obj)
 
+    def sync_grid_axis_object_placement(self, obj, element):
+        grid = (element.PartOfU or element.PartOfV or element.PartOfW)[0]
+        grid_obj = tool.Ifc.get_object(grid)
+        if grid_obj:
+            self.sync_object_placement(grid_obj)
+            if grid_obj.matrix_world != obj.matrix_world:
+                bpy.ops.bim.update_representation(obj=obj.name)
+
     def sync_object_container(self, guid, obj):
         element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
         element_collection = bpy.data.collections.get(obj.name)

src/blenderbim/test/bim/feature/project.feature

@@ -320,3 +320,20 @@ Scenario: Export IFC - with basic contents
     And I press "bim.load_project(filepath='{cwd}/test/files/basic.ifc')"
     When I press "export_ifc.bim(filepath='{cwd}/test/files/export.ifc')"
     Then nothing happens
+
+Scenario: Export IFC - with moved object location synchronised
+    Given an empty IFC project
+    When the object "IfcBuildingStorey/My Storey" is moved to "0,0,1"
+    And I press "export_ifc.bim(filepath='{cwd}/test/files/export.ifc')"
+    And an empty Blender session
+    And I press "bim.load_project(filepath='{cwd}/test/files/export.ifc')"
+    Then the object "IfcBuildingStorey/My Storey" is at "0,0,1"
+
+Scenario: Export IFC - with moved grid axis location synchronised
+    Given an empty IFC project
+    And I press "mesh.add_grid"
+    When the object "IfcGridAxis/01" is moved to "1,0,0"
+    And I press "export_ifc.bim(filepath='{cwd}/test/files/export.ifc')"
+    And an empty Blender session
+    And I press "bim.load_project(filepath='{cwd}/test/files/export.ifc')"
+    Then the object "IfcGridAxis/01" bottom left corner is at "1,-2,0"

src/blenderbim/test/bim/test_feature.py

@@ -41,6 +41,7 @@ def replace_variables(value):
 
 
 @given("an empty Blender session")
+@when("an empty Blender session")
 def an_empty_ifc_project():
     IfcStore.purge()
     bpy.ops.wm.read_homefile(app_template="")
@@ -140,6 +141,12 @@ def the_object_name_is_selected(name):
     additionally_the_object_name_is_selected(name)
 
 
+@given(parsers.parse('the object "{name}" is moved to "{location}"'))
+@when(parsers.parse('the object "{name}" is moved to "{location}"'))
+def the_object_name_is_selected(name, location):
+    the_object_name_exists(name).location += Vector([float(co) for co in location.split(",")])
+
+
 @given(parsers.parse('the object "{name}" is placed in the collection "{collection}"'))
 @when(parsers.parse('the object "{name}" is placed in the collection "{collection}"'))
 def the_object_name_is_placed_in_the_collection_collection(name, collection):
@@ -428,6 +435,14 @@ def the_object_name_is_at_location(name, location):
     ).length < 0.1, f"Object is at {obj_location}"
 
 
+@then(parsers.parse('the object "{name}" bottom left corner is at "{location}"'))
+def the_object_name_is_at_location(name, location):
+    obj_corner = Vector(the_object_name_exists(name).bound_box[0])
+    assert (
+        obj_corner - Vector([float(co) for co in location.split(",")])
+    ).length < 0.1, f"Object has corner {obj_corner}"
+
+
 @then(parsers.parse('the object "{name}" is contained in "{container_name}"'))
 def the_object_name_is_contained_in_container_name(name, container_name):
     ifc = an_ifc_file_exists()