Brim overhaul: New features and bug fixes

cura/BuildVolume.py

@@ -810,11 +810,6 @@ def _updateDisallowedAreas(self) -> None:
                             break
                     if prime_tower_collision:  # Already found a collision.
                         break
-                    if self._global_container_stack.getProperty("prime_tower_brim_enable", "value") and self._global_container_stack.getProperty("adhesion_type", "value") != "raft":
-                        brim_size = self._calculateBedAdhesionSize(used_extruders, "brim")
-                        # Use 2x the brim size, since we need 1x brim size distance due to the object brim and another
-                        # times the brim due to the brim of the prime tower
-                        prime_tower_areas[extruder_id][area_index] = prime_tower_area.getMinkowskiHull(Polygon.approximatedCircle(2 * brim_size, num_segments = 24))
                 if not prime_tower_collision:
                     result_areas[extruder_id].extend(prime_tower_areas[extruder_id])
                     result_areas_no_brim[extruder_id].extend(prime_tower_areas[extruder_id])
@@ -840,9 +835,13 @@ def _computeDisallowedAreasPrinted(self, used_extruders):
 
         result = {}
         skirt_brim_extruder: ExtruderStack = None
+        skirt_brim_extruder_nr = self._global_container_stack.getProperty("skirt_brim_extruder_nr", "value")
+
         for extruder in used_extruders:
-            if int(extruder.getProperty("extruder_nr", "value")) == int(self._global_container_stack.getProperty("skirt_brim_extruder_nr", "value")):
-                skirt_brim_extruder = extruder
+            if skirt_brim_extruder_nr == -1:
+                skirt_brim_extruder = used_extruders[0]  # The prime tower brim is always printed with the first extruder
+            elif int(extruder.getProperty("extruder_nr", "value")) == int(skirt_brim_extruder_nr):
+                    skirt_brim_extruder = extruder
             result[extruder.getId()] = []
 
         # Currently, the only normally printed object is the prime tower.
@@ -856,15 +855,6 @@ def _computeDisallowedAreasPrinted(self, used_extruders):
                 prime_tower_x = prime_tower_x - machine_width / 2 #Offset by half machine_width and _depth to put the origin in the front-left.
                 prime_tower_y = prime_tower_y + machine_depth / 2
 
-            if skirt_brim_extruder is not None and self._global_container_stack.getProperty("prime_tower_brim_enable", "value") and self._global_container_stack.getProperty("adhesion_type", "value") != "raft":
-                brim_size = (
-                    skirt_brim_extruder.getProperty("brim_line_count", "value") *
-                    skirt_brim_extruder.getProperty("skirt_brim_line_width", "value") / 100.0 *
-                    skirt_brim_extruder.getProperty("initial_layer_line_width_factor", "value")
-                )
-                prime_tower_x -= brim_size
-                prime_tower_y += brim_size
-
             radius = prime_tower_size / 2
             prime_tower_area = Polygon.approximatedCircle(radius, num_segments = 24)
             prime_tower_area = prime_tower_area.translate(prime_tower_x - radius, prime_tower_y - radius)
@@ -1076,7 +1066,7 @@ def _getSettingFromAllExtruders(self, setting_key: str) -> List[Any]:
                 all_values[i] = 0
         return all_values
 
-    def _calculateBedAdhesionSize(self, used_extruders, adhesion_override = None):
+    def _calculateBedAdhesionSize(self, used_extruders):
         """Get the bed adhesion size for the global container stack and used extruders
 
         :param adhesion_override: override adhesion type.
@@ -1086,52 +1076,12 @@ def _calculateBedAdhesionSize(self, used_extruders, adhesion_override = None):
             return None
 
         container_stack = self._global_container_stack
-        adhesion_type = adhesion_override
-        if adhesion_type is None:
-            adhesion_type = container_stack.getProperty("adhesion_type", "value")
-
-        # Skirt_brim_line_width is a bit of an odd one out. The primary bit of the skirt/brim is printed
-        # with the adhesion extruder, but it also prints one extra line by all other extruders. As such, the
-        # setting does *not* have a limit_to_extruder setting (which means that we can't ask the global extruder what
-        # the value is.
-        skirt_brim_extruder_nr = self._global_container_stack.getProperty("skirt_brim_extruder_nr", "value")
-        try:
-            skirt_brim_stack = self._global_container_stack.extruderList[int(skirt_brim_extruder_nr)]
-        except IndexError:
-            Logger.warning(f"Couldn't find extruder with index '{skirt_brim_extruder_nr}', defaulting to 0 instead.")
-            skirt_brim_stack = self._global_container_stack.extruderList[0]
-        skirt_brim_line_width = skirt_brim_stack.getProperty("skirt_brim_line_width", "value")
-
-        initial_layer_line_width_factor = skirt_brim_stack.getProperty("initial_layer_line_width_factor", "value")
-        # Use brim width if brim is enabled OR the prime tower has a brim.
-        if adhesion_type == "brim":
-            brim_line_count = skirt_brim_stack.getProperty("brim_line_count", "value")
-            brim_gap = skirt_brim_stack.getProperty("brim_gap", "value")
-            bed_adhesion_size = brim_gap + skirt_brim_line_width * brim_line_count * initial_layer_line_width_factor / 100.0
-
-            for extruder_stack in used_extruders:
-                bed_adhesion_size += extruder_stack.getProperty("skirt_brim_line_width", "value") * extruder_stack.getProperty("initial_layer_line_width_factor", "value") / 100.0
-
-            # We don't create an additional line for the extruder we're printing the brim with.
-            bed_adhesion_size -= skirt_brim_line_width * initial_layer_line_width_factor / 100.0
-        elif adhesion_type == "skirt":
-            skirt_distance = skirt_brim_stack.getProperty("skirt_gap", "value")
-            skirt_line_count = skirt_brim_stack.getProperty("skirt_line_count", "value")
-
-            bed_adhesion_size = skirt_distance + (
-                        skirt_brim_line_width * skirt_line_count) * initial_layer_line_width_factor / 100.0
-
-            for extruder_stack in used_extruders:
-                bed_adhesion_size += extruder_stack.getProperty("skirt_brim_line_width", "value") * extruder_stack.getProperty("initial_layer_line_width_factor", "value") / 100.0
-
-            # We don't create an additional line for the extruder we're printing the skirt with.
-            bed_adhesion_size -= skirt_brim_line_width * initial_layer_line_width_factor / 100.0
-        elif adhesion_type == "raft":
+        adhesion_type = container_stack.getProperty("adhesion_type", "value")
+
+        if adhesion_type == "raft":
             bed_adhesion_size = self._global_container_stack.getProperty("raft_margin", "value")  # Should refer to the raft extruder if set.
-        elif adhesion_type == "none":
+        else:  # raft, brim or skirt. Those last two are handled by CuraEngine.
             bed_adhesion_size = 0
-        else:
-            raise Exception("Unknown bed adhesion type. Did you forget to update the build volume calculations for your new bed adhesion type?")
 
         max_length_available = 0.5 * min(
             self._global_container_stack.getProperty("machine_width", "value"),

cura/Settings/ExtruderManager.py

@@ -275,7 +275,7 @@ def getUsedExtruderStacks(self) -> List["ExtruderStack"]:
         for extruder_setting in used_adhesion_extruders:
             extruder_str_nr = str(global_stack.getProperty(extruder_setting, "value"))
             if extruder_str_nr == "-1":
-                extruder_str_nr = self._application.getMachineManager().defaultExtruderPosition
+                continue  # An optional extruder doesn't force any extruder to be used if it isn't used already
             if extruder_str_nr in self.extruderIds:
                 used_extruder_stack_ids.add(self.extruderIds[extruder_str_nr])
 
@@ -298,7 +298,7 @@ def getInitialExtruderNr(self) -> int:
         # Starts with the adhesion extruder.
         adhesion_type = global_stack.getProperty("adhesion_type", "value")
         if adhesion_type in {"skirt", "brim"}:
-            return global_stack.getProperty("skirt_brim_extruder_nr", "value")
+            return max(0, int(global_stack.getProperty("skirt_brim_extruder_nr", "value")))  # optional skirt/brim extruder defaults to zero
         if adhesion_type == "raft":
             return global_stack.getProperty("raft_base_extruder_nr", "value")
 

cura/Settings/ExtruderStack.py

@@ -142,8 +142,6 @@ def getProperty(self, key: str, property_name: str, context: Optional[PropertyEv
 
         limit_to_extruder = super().getProperty(key, "limit_to_extruder", context)
         if limit_to_extruder is not None:
-            if limit_to_extruder == -1:
-                limit_to_extruder = int(cura.CuraApplication.CuraApplication.getInstance().getMachineManager().defaultExtruderPosition)
             limit_to_extruder = str(limit_to_extruder)
 
         if (limit_to_extruder is not None and limit_to_extruder != "-1") and self.getMetaDataEntry("position") != str(limit_to_extruder):

cura/Settings/GlobalStack.py

@@ -226,8 +226,6 @@ def getProperty(self, key: str, property_name: str, context: Optional[PropertyEv
         # Handle the "limit_to_extruder" property.
         limit_to_extruder = super().getProperty(key, "limit_to_extruder", context)
         if limit_to_extruder is not None:
-            if limit_to_extruder == -1:
-                limit_to_extruder = int(cura.CuraApplication.CuraApplication.getInstance().getMachineManager().defaultExtruderPosition)
             limit_to_extruder = str(limit_to_extruder)
         if limit_to_extruder is not None and limit_to_extruder != "-1" and limit_to_extruder in self._extruders:
             if super().getProperty(key, "settable_per_extruder", context):

plugins/CuraEngineBackend/StartSliceJob.py

@@ -487,6 +487,10 @@ def _buildGlobalSettingsMessage(self, stack: ContainerStack) -> None:
         settings["machine_start_gcode"] = self._expandGcodeTokens(settings["machine_start_gcode"], initial_extruder_nr)
         settings["machine_end_gcode"] = self._expandGcodeTokens(settings["machine_end_gcode"], initial_extruder_nr)
 
+        # Manually add 'nozzle offsetting', since that is a metadata-entry instead for some reason.
+        # NOTE: This probably needs to be an actual setting at some point.
+        settings["nozzle_offsetting_for_disallowed_areas"] = CuraApplication.getInstance().getGlobalContainerStack().getMetaDataEntry("nozzle_offsetting_for_disallowed_areas", True)
+
         # Add all sub-messages for each individual setting.
         for key, value in settings.items():
             setting_message = self._slice_message.getMessage("global_settings").addRepeatedMessage("settings")

resources/definitions/fdmprinter.def.json

@@ -4784,7 +4784,6 @@
                     "default_value": 8.0,
                     "minimum_value": "0.0",
                     "maximum_value_warning": "50.0",
-                    "maximum_value": "0.5 * min(machine_width, machine_depth)",
                     "enabled": "(support_enable or support_meshes_present) and support_brim_enable",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true,
@@ -4799,7 +4798,6 @@
                             "default_value": 20,
                             "minimum_value": "0",
                             "maximum_value_warning": "50 / skirt_brim_line_width",
-                            "maximum_value": "0.5 * min(machine_width, machine_depth) / skirt_brim_line_width",
                             "value": "math.ceil(support_brim_width / (skirt_brim_line_width * initial_layer_line_width_factor / 100.0))",
                             "enabled": "(support_enable or support_meshes_present) and support_brim_enable",
                             "settable_per_mesh": false,
@@ -5558,10 +5556,11 @@
                         {
                             "label": "Skirt/Brim Extruder",
                             "description": "The extruder train to use for printing the skirt or brim. This is used in multi-extrusion.",
-                            "type": "extruder",
+                            "type": "optional_extruder",
                             "default_value": "0",
                             "value": "adhesion_extruder_nr",
                             "enabled": "extruders_enabled_count > 1 and (resolveOrValue('adhesion_type') == 'skirt' or resolveOrValue('adhesion_type') == 'brim' or resolveOrValue('prime_tower_brim_enable'))",
+                            "resolve": "'-1' if '-1' in extruderValues('skirt_brim_extruder_nr') else adhesion_extruder_nr",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -5613,9 +5612,9 @@
                     "maximum_value_warning": "10",
                     "maximum_value": "0.5 * min(machine_width, machine_depth) / skirt_brim_line_width",
                     "enabled": "resolveOrValue('adhesion_type') == 'skirt'",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": false,
-                    "settable_per_extruder": true,
-                    "limit_to_extruder": "skirt_brim_extruder_nr"
+                    "settable_per_extruder": true
                 },
                 "skirt_gap":
                 {
@@ -5627,9 +5626,9 @@
                     "minimum_value_warning": "max(extruderValues('machine_nozzle_size'))",
                     "maximum_value_warning": "10",
                     "enabled": "resolveOrValue('adhesion_type') == 'skirt'",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": false,
-                    "settable_per_extruder": true,
-                    "limit_to_extruder": "skirt_brim_extruder_nr"
+                    "settable_per_extruder": true
                 },
                 "skirt_brim_minimal_length":
                 {
@@ -5642,6 +5641,7 @@
                     "minimum_value_warning": "25",
                     "maximum_value_warning": "2500",
                     "enabled": "resolveOrValue('adhesion_type') == 'skirt' or resolveOrValue('adhesion_type') == 'brim' or resolveOrValue('prime_tower_brim_enable')",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true
                 },
@@ -5654,11 +5654,10 @@
                     "default_value": 8.0,
                     "minimum_value": "0.0",
                     "maximum_value_warning": "50.0",
-                    "maximum_value": "0.5 * min(machine_width, machine_depth)",
                     "enabled": "resolveOrValue('adhesion_type') == 'brim' or resolveOrValue('prime_tower_brim_enable')",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true,
-                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "children":
                     {
                         "brim_line_count":
@@ -5669,12 +5668,11 @@
                             "default_value": 20,
                             "minimum_value": "0",
                             "maximum_value_warning": "50 / skirt_brim_line_width",
-                            "maximum_value": "0.5 * min(machine_width, machine_depth) / skirt_brim_line_width",
                             "value": "math.ceil(brim_width / (skirt_brim_line_width * initial_layer_line_width_factor / 100.0))",
                             "enabled": "resolveOrValue('adhesion_type') == 'brim' or resolveOrValue('prime_tower_brim_enable')",
+                            "limit_to_extruder": "skirt_brim_extruder_nr",
                             "settable_per_mesh": false,
-                            "settable_per_extruder": true,
-                            "limit_to_extruder": "skirt_brim_extruder_nr"
+                            "settable_per_extruder": true
                         }
                     }
                 },
@@ -5688,9 +5686,9 @@
                     "minimum_value": "0",
                     "maximum_value_warning": "skirt_brim_line_width",
                     "enabled": "resolveOrValue('adhesion_type') == 'brim'",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": true,
-                    "settable_per_extruder": true,
-                    "limit_to_extruder": "skirt_brim_extruder_nr"
+                    "settable_per_extruder": true
                 },
                 "brim_replaces_support":
                 {
@@ -5699,9 +5697,9 @@
                     "type": "bool",
                     "default_value": true,
                     "enabled": "resolveOrValue('adhesion_type') == 'brim' and (support_enable or support_meshes_present)",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": false,
-                    "settable_per_extruder": true,
-                    "limit_to_extruder": "support_infill_extruder_nr"
+                    "settable_per_extruder": true
                 },
                 "brim_outside_only":
                 {
@@ -5710,9 +5708,22 @@
                     "type": "bool",
                     "default_value": true,
                     "enabled": "resolveOrValue('adhesion_type') == 'brim'",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
                     "settable_per_mesh": false,
-                    "settable_per_extruder": true,
-                    "limit_to_extruder": "skirt_brim_extruder_nr"
+                    "settable_per_extruder": true
+                },
+                "brim_inside_margin":
+                {
+                    "label": "Brim Inside Avoid Margin",
+                    "description": "If brim is only on outside then parts fully enclosed inside another part will get a brim which might overlap with the internal holes of the outer part. This setting controls how far to stay away from those internal holes. Set to a high value to prevent any brim from being generated for parts enclosed within the holes of other parts.",
+                    "unit": "mm",
+                    "type": "float",
+                    "default_value": 5,
+                    "minimum_value": "0",
+                    "enabled": "resolveOrValue('adhesion_type') == 'brim' and any(extruderValues('brim_outside_only'))",
+                    "limit_to_extruder": "skirt_brim_extruder_nr",
+                    "settable_per_mesh": false,
+                    "settable_per_extruder": true
                 },
                 "raft_margin":
                 {