Implement rounding of elevation (#5532)

* Implement rounding of elevation

Implement rounding of elevation based on precision stored in IfcGeometricRepresentationContext

* Move formating function to tool

src/bonsai/bonsai/tool/spatial.py

@@ -35,6 +35,7 @@ import bonsai.core.tool
 import bonsai.core.root
 import bonsai.core.spatial
 import bonsai.core.geometry
+import bonsai.core.unit
 import bonsai.tool as tool
 import json
 from math import pi
@@ -452,7 +453,8 @@ class Spatial(bonsai.core.tool.Spatial):
         new.description = element.Description or ""
         new.long_name = element.LongName or ""
         if not element.is_a("IfcProject"):
-            new["elevation"] = str(ifcopenshell.util.placement.get_storey_elevation(element))
+            elevation = ifcopenshell.util.placement.get_storey_elevation(element)
+            new["elevation"] = tool.Unit.format_value(elevation)
         new.is_expanded = element.id() not in cls.contracted_containers
         new.level_index = level_index
         children = ifcopenshell.util.element.get_parts(element)

src/bonsai/bonsai/tool/unit.py

@@ -18,6 +18,7 @@
 
 import bpy
 import json
+import math
 import ifcopenshell
 import bonsai.bim.helper
 import bonsai.core.tool
@@ -182,3 +183,13 @@ class Unit(bonsai.core.tool.Unit):
             precision=4,
             split_unit=bpy.context.scene.unit_settings.system == "IMPERIAL",
         )
+
+    @classmethod
+    def format_value(cls, value: float) -> str:
+        precision = tool.Ifc.get().by_type("IfcGeometricRepresentationContext")[0].Precision
+        if precision:
+            decimal_places = math.ceil(math.log10(1/precision))
+        else:
+            precision = 1e-5
+            decimal_places = 5
+        return str(round(precision * round(value / precision), decimal_places))