Add support for different view scales

src/ifcblenderexport/blenderbim/cut_ifc.py

@@ -138,12 +138,15 @@ class IfcCutter:
             if product.is_a('IfcOpeningElement') or product.is_a('IfcSite'):
                 continue
             if product.Representation is not None:
-                if product.GlobalId in shape_map:
-                    shape = shape_map[product.GlobalId]
-                else:
-                    shape = ifcopenshell.geom.create_shape(settings, product).geometry
-                    shape_map[product.GlobalId] = shape
-                self.product_shapes.append((product, shape))
+                try:
+                    if product.GlobalId in shape_map:
+                        shape = shape_map[product.GlobalId]
+                    else:
+                        shape = ifcopenshell.geom.create_shape(settings, product).geometry
+                        shape_map[product.GlobalId] = shape
+                    self.product_shapes.append((product, shape))
+                except:
+                    print('Failed to create shape for {}'.format(product))
 
         if not os.path.isfile(self.pickle_file):
             with open(self.pickle_file, 'wb') as shape_file:

src/ifcblenderexport/blenderbim/operator.py

@@ -804,6 +804,8 @@ class CutSection(bpy.types.Operator):
         }
         ifc_cutter.pickle_file = os.path.join(ifc_cutter.data_dir, 'shapes.pickle')
         svg_writer = cut_ifc.SvgWriter(ifc_cutter)
+        numerator, denominator = bpy.context.scene.DocProperties.diagram_scale.split(':')
+        svg_writer.scale = float(numerator) / float(denominator)
         ifc_cutter.cut()
         svg_writer.write()
         return {'FINISHED'}

src/ifcblenderexport/blenderbim/prop.py

@@ -24,6 +24,7 @@ class IfcSchema():
 
 ifc_schema = IfcSchema()
 
+diagram_scales_enum = []
 classes_enum = []
 types_enum = []
 psetnames_enum = []
@@ -64,6 +65,26 @@ def refreshPredefinedTypes(self, context):
     getIfcPredefinedTypes(self, context)
 
 
+def getDiagramScales(self, context):
+    global diagram_scales_enum
+    if len(diagram_scales_enum) < 1:
+        diagram_scales_enum.extend([
+            ('1:5000', '1:5000', ''),
+            ('1:2000', '1:2000', ''),
+            ('1:1000', '1:1000', ''),
+            ('1:500', '1:500', ''),
+            ('1:200', '1:200', ''),
+            ('1:100', '1:100', ''),
+            ('1:50', '1:50', ''),
+            ('1:20', '1:20', ''),
+            ('1:10', '1:10', ''),
+            ('1:5', '1:5', ''),
+            ('1:2', '1:2', ''),
+            ('1:1', '1:1', '')
+        ])
+    return diagram_scales_enum
+
+
 def getIfcClasses(self, context):
     global classes_enum
     if len(classes_enum) < 1:
@@ -172,7 +193,7 @@ class Subcontext(PropertyGroup):
 
 
 class DocProperties(PropertyGroup):
-    blah: StringProperty(name="Blah")
+    diagram_scale: EnumProperty(items=getDiagramScales, name='Diagram Scale')
 
 
 class BIMProperties(PropertyGroup):

src/ifcblenderexport/blenderbim/ui.py

@@ -193,7 +193,8 @@ class BIM_PT_documentation(Panel):
         layout = self.layout
         props = bpy.context.scene.DocProperties
 
-        row = layout.row()
+        row = layout.row(align=True)
+        row.prop(props, 'diagram_scale', text='')
         row.operator('bim.cut_section')
 
         row = layout.row()