Allow selection of max grouping distance in UI

src/ifcblenderexport/blenderbim/bim/operator.py

@@ -1921,7 +1921,7 @@ class SmartClashGroup(bpy.types.Operator):
         
         # execute the smart grouping
         save_path = bpy.path.ensure_ext(bpy.context.scene.BIMProperties.smart_grouped_clashes_path, ".json")
-        smart_grouped_clashes = ifc_clasher.smart_group_clashes(clash_sets)
+        smart_grouped_clashes = ifc_clasher.smart_group_clashes(clash_sets, bpy.context.scene.BIMProperties.smart_clash_grouping_max_distance)
 
         # save smart_groups to json
         with open(save_path, 'w') as f:
@@ -1965,7 +1965,7 @@ class LoadSmartGroupsForActiveClashSet(bpy.types.Operator):
         with open(smart_groups_path) as f:
             smart_grouped_clashes = json.load(f)
 
-            # Reset the list of smart_clash_groups for the UI
+        # Reset the list of smart_clash_groups for the UI
         bpy.context.scene.BIMProperties.smart_clash_groups.clear()
                 
         for clash_set, smart_groups in smart_grouped_clashes.items():

src/ifcblenderexport/blenderbim/bim/prop.py

@@ -1527,6 +1527,7 @@ class BIMProperties(PropertyGroup):
     active_clash_set_index: IntProperty(name="Active Clash Set Index")
     smart_clash_groups: CollectionProperty(name="Smart Clash Groups", type=SmartClashGroup)
     active_smart_group_index: IntProperty(name="Active Smart Group Index")
+    smart_clash_grouping_max_distance: IntProperty(name="Smart Clash Grouping Max Distance", default=3, soft_min=1, soft_max=10)
     constraints: CollectionProperty(name="Constraints", type=Constraint)
     active_constraint_index: IntProperty(name="Active Constraint Index")
     eastings: StringProperty(name="Eastings")

src/ifcblenderexport/blenderbim/bim/ui.py

@@ -2389,6 +2389,9 @@ class BIM_PT_clash_manager(Panel):
         row.prop(props, "smart_grouped_clashes_path", text="")
         op = row.operator("bim.select_smart_grouped_clashes_path", icon="FILE_FOLDER", text="")
 
+        row = layout.row(align=True)
+        row.prop(props, "smart_clash_grouping_max_distance")
+
         row = layout.row(align=True)
         row.operator("bim.smart_clash_group")
 

src/ifcclash/ifcclash.py

@@ -268,7 +268,7 @@ class IfcClasher:
         if element.ObjectPlacement.RelativePlacement.RefDirection:
             element.ObjectPlacement.RelativePlacement.RefDirection.DirectionRatios = (1.0, 0.0, 0.0)
 
-    def smart_group_clashes(self, clash_sets):
+    def smart_group_clashes(self, clash_sets, max_clustering_distance):
         count_of_input_clashes = 0
         count_of_clash_sets = 0
         count_of_smart_groups = 0
@@ -291,7 +291,11 @@ class IfcClasher:
 
             # INPUTS
             # set the desired maximum distance between the grouped points
-            max_distance_between_grouped_points = 3
+            if max_clustering_distance > 0:
+                max_distance_between_grouped_points = max_clustering_distance
+            else:
+                max_distance_between_grouped_points = 3
+
             model = OPTICS(min_samples=2, max_eps=max_distance_between_grouped_points)
             model.fit_predict(data)
             pred = model.fit_predict(data)