Optimise object placement change checking, so medium sized project exports are 5 seconds faster at minimum, but can be much higher since false positives are culled.

src/blenderbim/test/tool/test_geometry.py

@@ -18,7 +18,7 @@
 
 import bpy
 import math
-import numpy
+import numpy as np
 import ifcopenshell
 import blenderbim.core.tool
 import blenderbim.tool as tool
@@ -352,6 +352,14 @@ class TestLink(NewFile):
         assert obj.BIMMeshProperties.ifc_definition_id == element.id()
 
 
+class TestRecordObjectPosition(NewFile):
+    def test_run(self):
+        obj = bpy.data.objects.new("Object", None)
+        subject.record_object_position(obj)
+        assert obj.BIMObjectProperties.location_checksum == repr(np.array(obj.matrix_world.translation).tobytes())
+        assert obj.BIMObjectProperties.rotation_checksum == repr(np.array(obj.matrix_world.to_3x3()).tobytes())
+
+
 class TestRenameObject(NewFile):
     def test_run(self):
         obj = bpy.data.meshes.new("Mesh")