#2224 You can now specify element offset / limit ranges when loading models

src/blenderbim/blenderbim/bim/import_ifc.py

@@ -314,14 +314,19 @@ class IfcImporter:
             self.settings_2d.set_context_ids(self.plan_contexts)
 
     def process_element_filter(self):
+        offset = self.ifc_import_settings.element_offset
+        offset_limit = offset + self.ifc_import_settings.element_limit
+
         if self.ifc_import_settings.has_filter:
-            self.elements = set(self.ifc_import_settings.elements)
+            self.elements = self.ifc_import_settings.elements
             # TODO: enable filtering for annotations
             self.annotations = set(self.file.by_type("IfcAnnotation"))
         else:
-            self.elements = set(self.file.by_type("IfcElement"))
+            self.elements = self.file.by_type("IfcElement")
             self.annotations = set(self.file.by_type("IfcAnnotation"))
 
+        self.elements = set(self.elements[offset:offset_limit])
+
         if self.ifc_import_settings.has_filter and self.ifc_import_settings.should_filter_spatial_elements:
             self.spatial_elements = self.get_spatial_elements_filtered_by_elements(self.elements)
         else:
@@ -366,7 +371,7 @@ class IfcImporter:
             return True
 
         if not self.ifc_import_settings.should_use_native_meshes:
-            return False # Performance improvements only occur on edge cases currently
+            return False  # Performance improvements only occur on edge cases currently
 
         # FacetedBreps (without voids) are meshes. See #841.
         if self.is_native_faceted_brep(representations):
@@ -1924,6 +1929,8 @@ class IfcImportSettings:
         self.angular_tolerance = 0.5
         self.distance_limit = 1000
         self.false_origin = None
+        self.element_offset = 0
+        self.element_limit = 30000
         self.has_filter = None
         self.should_filter_spatial_elements = True
         self.elements = set()
@@ -1949,11 +1956,9 @@ class IfcImportSettings:
         settings.deflection_tolerance = props.deflection_tolerance
         settings.angular_tolerance = props.angular_tolerance
         settings.distance_limit = props.distance_limit
-        settings.false_origin = (
-            [float(o) for o in props.false_origin.split(",")]
-            if props.false_origin
-            else None
-        )
+        settings.false_origin = [float(o) for o in props.false_origin.split(",")] if props.false_origin else None
         if settings.false_origin == [0, 0, 0]:
             settings.false_origin = None
+        settings.element_offset = props.element_offset
+        settings.element_limit = props.element_limit
         return settings

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

@@ -495,6 +495,7 @@ class LoadProject(bpy.types.Operator, IFCFileSelector):
             return {"FINISHED"}
         context.scene.BIMProperties.ifc_file = self.filepath
         context.scene.BIMProjectProperties.is_loading = True
+        context.scene.BIMProjectProperties.total_elements = len(tool.Ifc.get().by_type("IfcElement"))
         if not self.is_advanced:
             bpy.ops.bim.load_project_elements()
         return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/project/prop.py

@@ -130,6 +130,7 @@ class BIMProjectProperties(PropertyGroup):
         name="Filter Mode",
         update=update_filter_mode,
     )
+    total_elements: IntProperty(name="Total Elements", default=0)
     filter_categories: CollectionProperty(name="Filter Categories", type=FilterCategory)
     active_filter_category_index: IntProperty(name="Active Filter Category Index")
     filter_query: StringProperty(name="Filter Query")
@@ -144,6 +145,8 @@ class BIMProjectProperties(PropertyGroup):
     angular_tolerance: FloatProperty(name="Angular Tolerance", default=0.5)
     distance_limit: FloatProperty(name="Distance Limit", default=1000)
     false_origin: StringProperty(name="False Origin", default="0,0,0")
+    element_offset: IntProperty(name="Element Offset", default=0)
+    element_limit: IntProperty(name="Element Offset", default=30000)
     links: CollectionProperty(name="Links", type=Link)
     active_link_index: IntProperty(name="Active Link Index")
     export_schema: EnumProperty(items=get_export_schema, name="IFC Schema")

src/blenderbim/blenderbim/bim/module/project/ui.py

@@ -54,7 +54,7 @@ class BIM_PT_project(Panel):
         row.prop(pprops, "filter_mode")
         if pprops.filter_mode in ["DECOMPOSITION", "IFC_CLASS", "IFC_TYPE"]:
             row = self.layout.row(align=True)
-            row.alignment = "RIGHT"
+            row.label(text=f"Total: {pprops.total_elements}")
             row.operator("bim.toggle_filter_categories", text="", icon="CHECKBOX_HLT").should_select = True
             row.operator("bim.toggle_filter_categories", text="", icon="CHECKBOX_DEHLT").should_select = False
             self.layout.template_list(
@@ -91,6 +91,12 @@ class BIM_PT_project(Panel):
         row = self.layout.row()
         row.prop(pprops, "false_origin")
 
+        row = self.layout.row()
+        row.label(text="Element Range")
+        row = self.layout.row(align=True)
+        row.prop(pprops, "element_offset", text="")
+        row.prop(pprops, "element_limit", text="")
+
         row = self.layout.row(align=True)
         row.operator("bim.load_project_elements")
         row.operator("bim.unload_project", text="", icon="CANCEL")