See #6121. Area measurement tool now uses IFC area unit.

src/bonsai/bonsai/bim/module/drawing/helper.py

@@ -19,6 +19,7 @@
 import bpy
 import math
 import mathutils.geometry
+import ifcopenshell
 import bonsai.tool as tool
 from mathutils import Vector
 
@@ -135,6 +136,7 @@ def format_distance(
     scaleFactor = bpy.context.scene.unit_settings.scale_length
     unit_system = bpy.context.scene.unit_settings.system
     unit_length = bpy.context.scene.unit_settings.length_unit
+    area_unit_symbol = " " + ifcopenshell.util.unit.get_unit_symbol(ifcopenshell.util.unit.get_project_unit(tool.Ifc.get(), "AREAUNIT"))
 
     value *= scaleFactor
 
@@ -225,7 +227,24 @@ def format_distance(
             if add_inches or frac:
                 tx_dist += '"'
         else:
-            tx_dist = str("%1.3f" % (value * toInches / inPerFoot)) + " sq. ft."
+            fmt = "%1.3f"
+            sq_feet = round(value * toInches / inPerFoot, 4)
+            tx_dist = ""
+            if area_unit_symbol == " ft2":
+                fmt += area_unit_symbol
+                tx_dist = fmt % sq_feet
+            if area_unit_symbol == " in2":
+                sq_inch = sq_feet * 144
+                fmt += area_unit_symbol
+                tx_dist = fmt % sq_inch
+            if area_unit_symbol == " yd2":
+                sq_yard = sq_feet / 9
+                fmt += area_unit_symbol
+                tx_dist = fmt % sq_yard
+            if area_unit_symbol == " mi2":
+                sq_mile = sq_feet / 27878400
+                fmt += area_unit_symbol
+                tx_dist = fmt % sq_mile
 
     # METRIC FORMATTING
     elif unit_system == "METRIC":
@@ -287,7 +306,27 @@ def format_distance(
                     d_mm = value * (1000)
                     tx_dist = fmt % d_mm
         if isArea:
-            tx_dist += s_code
+            if area_unit_symbol == " m2":
+                if decimal_places is None:
+                    fmt = "%1.3f"
+                if hide_units is False:
+                    fmt += area_unit_symbol
+                tx_dist = fmt % value
+            if area_unit_symbol == " cm2":
+                if decimal_places is None:
+                    fmt = "%1.1f"
+                if hide_units is False:
+                    fmt += area_unit_symbol
+                d_cm = value * (10000)
+                tx_dist = fmt % d_cm
+            if area_unit_symbol == " mm2":
+                if decimal_places is None:
+                    fmt = "%1.0f"
+                if hide_units is False:
+                    fmt += area_unit_symbol
+                d_cm = value * (1000000)
+                tx_dist = fmt % d_cm
+            
     else:
         tx_dist = fmt % value
 

src/bonsai/bonsai/tool/polyline.py

@@ -453,12 +453,14 @@ class Polyline(bonsai.core.tool.Polyline):
         unit_scale = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
         if bpy.context.scene.unit_settings.system == "IMPERIAL":
             precision = bpy.context.scene.DocProperties.imperial_precision
+            if is_area:
+                area_unit = bpy.context.scene.BIMProperties.area_unit
+                unit_scale = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get(), unit_type=area_unit)
         else:
             precision = None
 
-        value = value if is_area else value / unit_scale
         return format_distance(
-            value,
+            value / unit_scale,
             precision=precision,
             hide_units=False,
             isArea=is_area,