Fix bug where an added default material was not linked and auto synced.

src/blenderbim/blenderbim/bim/export_ifc.py

@@ -134,7 +134,7 @@ 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 (obj.scale - Vector((1., 1.,1.))).length > 1e-4:
+        if (obj.scale - Vector((1.0, 1.0, 1.0))).length > 1e-4:
             bpy.ops.bim.update_representation(obj=obj.name)
             return element
         if element.is_a("IfcGridAxis"):

src/blenderbim/blenderbim/bim/module/material/operator.py

@@ -137,7 +137,7 @@ class UnlinkMaterial(bpy.types.Operator, Operator):
     bl_options = {"REGISTER", "UNDO"}
 
     def _execute(self, context):
-        core.unlink_material(tool.Material, obj=context.active_object.active_material)
+        core.unlink_material(tool.Ifc, obj=context.active_object.active_material)
 
 
 class AssignMaterial(bpy.types.Operator):

src/blenderbim/blenderbim/core/material.py

@@ -17,11 +17,11 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
 
-def unlink_material(material, obj=None):
+def unlink_material(ifc, obj=None):
-    material.unlink(obj)
+    ifc.unlink(obj=obj)
 
 
 def add_default_material(ifc, material):
     obj = material.add_default_material_object()
-    material.link(ifc.run("material.add_material", name="Default"), obj)
+    ifc.link(ifc.run("material.add_material", name="Default"), obj)
     return obj

src/blenderbim/blenderbim/core/tool.py

@@ -121,8 +121,6 @@ class Ifc:
 @interface
 class Material:
     def add_default_material_object(cls): pass
-    def link(cls, element, obj): pass
-    def unlink(cls, obj): pass
 
 
 @interface

src/blenderbim/blenderbim/tool/geometry.py

@@ -45,7 +45,7 @@ class Geometry(blenderbim.core.tool.Geometry):
 
     @classmethod
     def clear_scale(cls, obj):
-        if (obj.scale - Vector((1., 1.,1.))).length > 1e-4:
+        if (obj.scale - Vector((1.0, 1.0, 1.0))).length > 1e-4:
             if obj.data.users == 1:
                 context_override = {}
                 context_override["object"] = context_override["active_object"] = obj

src/blenderbim/blenderbim/tool/material.py

@@ -27,11 +27,3 @@ class Material(blenderbim.core.tool.Material):
     @classmethod
     def add_default_material_object(cls):
         return bpy.data.materials.new("Default")
-
-    @classmethod
-    def link(cls, material, obj):
-        obj.BIMObjectProperties.ifc_definition_id = material.id()
-
-    @classmethod
-    def unlink(self, obj):
-        obj.BIMObjectProperties.ifc_definition_id = 0

src/blenderbim/test/bim/feature/material.feature

@@ -6,7 +6,24 @@ Scenario: Add default material
     When I press "bim.add_default_material"
     Then the material "Default" exists
 
-Scenario: Unlink object
+Scenario: Add material
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I add a material
+    When I press "bim.add_material"
+    Then the material "Material" is an IFC material
+
+Scenario: Remove material
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I add a material
+    And I press "bim.add_material"
+    When I press "bim.remove_material"
+    Then the material "Material" is not an IFC material
+
+Scenario: Unlink material
     Given an empty IFC project
     And I add a cube
     And the object "Cube" is selected

src/blenderbim/test/bim/test_feature.py

@@ -367,6 +367,12 @@ def the_object_name_is_not_an_ifc_element(name):
     assert id != 0, f"The ID is {id}"
 
 
+@then(parsers.parse('the material "{name}" is an IFC material'))
+def the_material_name_is_not_an_ifc_material(name):
+    id = the_material_name_exists(name).BIMObjectProperties.ifc_definition_id
+    assert id != 0, f"The ID is {id}"
+
+
 @then(parsers.parse('the material "{name}" is not an IFC material'))
 def the_material_name_is_not_an_ifc_material(name):
     id = the_material_name_exists(name).BIMObjectProperties.ifc_definition_id

src/blenderbim/test/core/test_material.py

@@ -21,14 +21,14 @@ from test.core.bootstrap import ifc, material
 
 
 class TestUnlinkMaterial:
-    def test_run(self, material):
+    def test_run(self, ifc):
-        material.unlink("obj").should_be_called()
+        ifc.unlink(obj="obj").should_be_called()
-        subject.unlink_material(material, obj="obj")
+        subject.unlink_material(ifc, obj="obj")
 
 
 class TestAddDefaultMaterial:
     def test_run(self, ifc, material):
         material.add_default_material_object().should_be_called().will_return("obj")
         ifc.run("material.add_material", name="Default").should_be_called().will_return("material")
-        material.link("material", "obj").should_be_called()
+        ifc.link("material", "obj").should_be_called()
         assert subject.add_default_material(ifc, material) == "obj"

src/blenderbim/test/tool/test_ifc.py

@@ -101,7 +101,7 @@ class TestGetObject(test.bim.bootstrap.NewFile):
 
 
 class TestLink(test.bim.bootstrap.NewFile):
-    def test_run(self):
+    def test_link_an_object(self):
         ifc = ifcopenshell.file()
         subject.set(ifc)
         element = ifc.createIfcWall()
@@ -110,9 +110,18 @@ class TestLink(test.bim.bootstrap.NewFile):
         assert subject.get_entity(obj) == element
         assert subject.get_object(element) == obj
 
+    def test_link_a_material(self):
+        ifc = ifcopenshell.file()
+        subject.set(ifc)
+        element = ifc.createIfcMaterial()
+        obj = bpy.data.materials.new("Material")
+        subject.link(element, obj)
+        assert subject.get_entity(obj) == element
+        assert subject.get_object(element) == obj
+
 
 class TestUnlink(test.bim.bootstrap.NewFile):
-    def test_run(self):
+    def test_unlink_an_object(self):
         ifc = ifcopenshell.file()
         subject.set(ifc)
         element = ifc.createIfcWall()
@@ -122,6 +131,16 @@ class TestUnlink(test.bim.bootstrap.NewFile):
         assert subject.get_entity(obj) is None
         assert subject.get_object(element) is None
 
+    def test_unlink_a_material(self):
+        ifc = ifcopenshell.file()
+        subject.set(ifc)
+        element = ifc.createIfcMaterial()
+        obj = bpy.data.materials.new("Material")
+        subject.link(element, obj)
+        subject.unlink(element, obj)
+        assert subject.get_entity(obj) is None
+        assert subject.get_object(element) is None
+
     def test_unlinking_using_an_object(self):
         ifc = ifcopenshell.file()
         subject.set(ifc)

src/blenderbim/test/tool/test_material.py

@@ -34,22 +34,3 @@ class TestAddDefaultMaterialObject(NewFile):
         material = subject.add_default_material_object()
         assert isinstance(material, bpy.types.Material)
         assert material.name == "Default"
-
-
-class TestLink(NewFile):
-    def test_run(self):
-        obj = bpy.data.materials.new("Material")
-        ifc = ifcopenshell.file()
-        material = ifc.createIfcMaterial()
-        subject.link(material, obj)
-        assert obj.BIMObjectProperties.ifc_definition_id == material.id()
-
-
-class TestUnlink(NewFile):
-    def test_run(self):
-        obj = bpy.data.materials.new("Material")
-        ifc = ifcopenshell.file()
-        material = ifc.createIfcMaterial()
-        subject.link(material, obj)
-        subject.unlink(obj)
-        assert obj.BIMObjectProperties.ifc_definition_id == 0