thick internal bridges (#2954)

(cherry picked from commit f2f2ede5d5)

src/libslic3r/Fill/Fill.cpp

@@ -485,9 +485,10 @@ std::vector<SurfaceFill> group_fills(const Layer &layer)
 		        
 		        // Calculate the actual flow we'll be using for this infill.
 		        params.bridge = is_bridge || Fill::use_bridge_flow(params.pattern);
+                const bool is_thick_bridge = surface.is_bridge() && (surface.is_internal_bridge() ? object_config.thick_internal_bridges : object_config.thick_bridges);
 				params.flow   = params.bridge ?
-					//BBS: always enable thick bridge for internal bridge
-					layerm.bridging_flow(extrusion_role, (surface.is_bridge() && !surface.is_external()) || object_config.thick_bridges) :
+					//Orca: enable thick bridge based on config
+					layerm.bridging_flow(extrusion_role, is_thick_bridge) :
 					layerm.flow(extrusion_role, (surface.thickness == -1) ? layer.height : surface.thickness);
 
 				// Calculate flow spacing for infill pattern generation.

src/libslic3r/Preset.cpp

@@ -786,7 +786,7 @@ static std::vector<std::string> s_Preset_print_options {
     "independent_support_layer_height",
     "support_angle", "support_interface_top_layers", "support_interface_bottom_layers",
     "support_interface_pattern", "support_interface_spacing", "support_interface_loop_pattern",
-    "support_top_z_distance", "support_on_build_plate_only","support_critical_regions_only", "bridge_no_support", "thick_bridges", "max_bridge_length", "print_sequence", "support_remove_small_overhang",
+    "support_top_z_distance", "support_on_build_plate_only","support_critical_regions_only", "bridge_no_support", "thick_bridges", "thick_internal_bridges", "max_bridge_length", "print_sequence", "support_remove_small_overhang",
     "filename_format", "wall_filament", "support_bottom_z_distance",
     "sparse_infill_filament", "solid_infill_filament", "support_filament", "support_interface_filament","support_interface_not_for_body",
     "ooze_prevention", "standby_temperature_delta", "interface_shells", "line_width", "initial_layer_line_width",

src/libslic3r/PrintConfig.cpp

@@ -1202,6 +1202,15 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionBool(false));
 
+    def = this->add("thick_internal_bridges", coBool);
+    def->label = L("Thick internal bridges");
+    def->category = L("Quality");
+    def->tooltip  = L("If enabled, thick internal bridges will be used. It's usually recommended to have this feature turned on. However, "
+                       "consider turning it off if you are using large nozzles.");
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionBool(true));
+
+
     def = this->add("max_bridge_length", coFloat);
     def->label = L("Max bridge length");
     def->category = L("Support");

src/libslic3r/PrintConfig.hpp

@@ -741,7 +741,9 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionEnum<SupportMaterialStyle>, support_style))
     // BBS
     //((ConfigOptionBool,                independent_support_layer_height))
+    // Orca internal thick bridge
     ((ConfigOptionBool,                thick_bridges))
+    ((ConfigOptionBool,                thick_internal_bridges))
     // Overhang angle threshold.
     ((ConfigOptionInt,                 support_threshold_angle))
     ((ConfigOptionFloat,               support_object_xy_distance))

src/slic3r/GUI/Tab.cpp

@@ -1952,6 +1952,7 @@ void TabPrint::build()
 	    optgroup->append_single_option_line("internal_bridge_flow");
         optgroup->append_single_option_line("bridge_density");
         optgroup->append_single_option_line("thick_bridges");
+        optgroup->append_single_option_line("thick_internal_bridges");
         optgroup->append_single_option_line("top_solid_infill_flow_ratio");
         optgroup->append_single_option_line("bottom_solid_infill_flow_ratio");
         optgroup->append_single_option_line("only_one_wall_top");