See #3421. Fix bug where some projection fills wouldn't polygonize correctly in shapely due to numerical tolerance.

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

@@ -23,6 +23,7 @@ import json
 import time
 import bmesh
 import shutil
+import hashlib
 import shapely
 import subprocess
 import webbrowser
@@ -365,7 +366,6 @@ class CreateDrawing(bpy.types.Operator):
         return svg_path
 
     def generate_linework(self, context):
-        global ifcopenshell
         if not ifcopenshell.util.element.get_pset(self.drawing, "EPset_Drawing", "HasLinework"):
             return
         svg_path = self.get_svg_path(cache_type="linework")
@@ -395,10 +395,6 @@ class CreateDrawing(bpy.types.Operator):
             }
         cached_linework -= edited_guids
 
-        # This is a work in progress. See #1153 and #1564.
-        import hashlib
-        import ifcopenshell.draw
-
         files = {context.scene.BIMProperties.ifc_file: tool.Ifc.get()}
 
         for ifc_path, ifc in files.items():
@@ -569,7 +565,7 @@ class CreateDrawing(bpy.types.Operator):
             for projection in projections:
                 boundary_lines = []
                 for path in projection.findall("./{http://www.w3.org/2000/svg}path"):
-                    start, end = [co[1:].split(",") for co in path.attrib["d"].split()]
+                    start, end = [[round(float(o), 1) for o in co[1:].split(",")] for co in path.attrib["d"].split()]
                     boundary_lines.append(shapely.LineString([start, end]))
                 unioned_boundaries = shapely.union_all(shapely.GeometryCollection(boundary_lines))
                 closed_polygons = shapely.polygonize(unioned_boundaries.geoms)