Crash was caused by some change in Blender Python API in 3.5.
The code below resulted in `ValueError: bpy_struct: item.attr = val: MeshPolygon.vertices: array length cannot be changed to 4 (expected 0)`
```
obj.data.polygons.add(1)
p1 = obj.data.polygons[-1]
p1.vertices = (v1.index, v2.index, v3.index, v4.index)
```
Now adding STAIR_ARROW annotation is a bit more clever - if you have IfcStairFlight selected when adding this type of annotation it will automatically:
1) define stair as it's parent;
2) add the stair as it's product;
3) place itself along the stair (it's assumed that stair direction is X+)
Example - https://i.imgur.com/Ze9DoK2.png
It was causing an error below on opening BIM Tool and probably in some other places.
```
Traceback (most recent call last):
File "C:\software\Steam\steamapps\common\Blender\3.5\scripts\startup\bl_ui\space_view3d.py", line 35, in draw
self.draw_tool_settings(context)
File "C:\software\Steam\steamapps\common\Blender\3.5\scripts\startup\bl_ui\space_view3d.py", line 48, in draw_tool_settings
tool = ToolSelectPanelHelper.draw_active_tool_header(
File "C:\software\Steam\steamapps\common\Blender\3.5\scripts\startup\bl_ui\space_toolsystem_common.py", line 809, in draw_active_tool_header
draw_settings(context, layout, tool)
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\workspace.py", line 67, in draw_settings
BimToolUI.draw(context, layout)
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\workspace.py", line 89, in draw
AuthoringData.load()
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\data.py", line 52, in load
cls.load_ifc_classes()
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\data.py", line 109, in load_ifc_classes
cls.data["ifc_classes"] = cls.ifc_classes()
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\data.py", line 196, in ifc_classes
+ tool.Ifc.get().by_type("IfcDoorStyle")
File "\Blender\3.5\scripts\addons\blenderbim\libs\site\packages\ifcopenshell\file.py", line 364, in by_type
return [entity_instance(e, self) for e in self.wrapped_data.by_type(type)]
File "\Blender\3.5\scripts\addons\blenderbim\libs\site\packages\ifcopenshell\ifcopenshell_wrapper.py", line 4499, in by_type
return _ifcopenshell_wrapper.file_by_type(self, *args)
RuntimeError: Entity with name 'IfcDoorStyle' not found in schema 'IFC4X3'
Traceback (most recent call last):
File "C:\software\Steam\steamapps\common\Blender\3.5\scripts\startup\bl_ui\space_view3d.py", line 35, in draw
self.draw_tool_settings(context)
File "C:\software\Steam\steamapps\common\Blender\3.5\scripts\startup\bl_ui\space_view3d.py", line 48, in draw_tool_settings
tool = ToolSelectPanelHelper.draw_active_tool_header(
File "C:\software\Steam\steamapps\common\Blender\3.5\scripts\startup\bl_ui\space_toolsystem_common.py", line 809, in draw_active_tool_header
draw_settings(context, layout, tool)
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\workspace.py", line 67, in draw_settings
BimToolUI.draw(context, layout)
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\workspace.py", line 92, in draw
cls.draw_header_interface()
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\workspace.py", line 351, in draw_header_interface
cls.draw_type_selection_interface()
File "\Blender\3.5\scripts\addons\blenderbim\bim\module\model\workspace.py", line 367, in draw_type_selection_interface
if AuthoringData.data["ifc_classes"]:
KeyError: 'ifc_classes'
```
Added support for sliding doors in IFC Door Modifier.
The main differences are 2d representation (https://i.imgur.com/VyEH569.png) and the door panel being placed before the lining, not after
Function include building a simple highway alignment and mapping of sementic segment definitions to geometric definitions (this part is still a work in progress)
Andrej730
