#205 separate external perimeters and thin walls (speed & gcode layout).

resources/ui_layout/print.ui

@@ -189,8 +189,9 @@ group:label_width$8:Speed for print moves
 	line:Bridge speed
 		setting:label$_:width$4:bridge_speed
 	end_line
-	line:Gap fill speed
+	line:Thin extrusions speed
-		setting:label$_:width$4:gap_fill_speed
+		setting:width$4:gap_fill_speed
+		setting:width$4:thin_walls_speed
 	end_line
 group:Speed for non-print moves
 	setting:travel_speed

src/libslic3r/ExtrusionEntity.cpp

@@ -274,6 +274,7 @@ std::string ExtrusionEntity::role_to_string(ExtrusionRole role)
         case erSolidInfill                  : return L("Solid infill");
         case erTopSolidInfill               : return L("Top solid infill");
         case erBridgeInfill                 : return L("Bridge infill");
+        case erThinWall                     : return L("Thin wall");
         case erGapFill                      : return L("Gap fill");
         case erSkirt                        : return L("Skirt");
         case erSupportMaterial              : return L("Support material");

src/libslic3r/ExtrusionEntity.hpp

@@ -23,6 +23,7 @@ enum ExtrusionRole : uint8_t {
     erSolidInfill,
     erTopSolidInfill,
     erBridgeInfill,
+    erThinWall,
     erGapFill,
     erSkirt,
     erSupportMaterial,
@@ -54,6 +55,7 @@ inline bool is_perimeter(ExtrusionRole role)
 {
     return role == erPerimeter
         || role == erExternalPerimeter
+        || role == erThinWall
         || role == erOverhangPerimeter;
 }
 

src/libslic3r/GCode.cpp

@@ -3524,6 +3524,8 @@ std::string GCode::_before_extrude(const ExtrusionPath &path, const std::string
             speed = m_config.get_abs_value("solid_infill_speed");
         } else if (path.role() == erTopSolidInfill) {
             speed = m_config.get_abs_value("top_solid_infill_speed");
+        } else if (path.role() == erThinWall) {
+            speed = m_config.get_abs_value("thin_walls_speed");
         } else if (path.role() == erGapFill) {
             speed = m_config.get_abs_value("gap_fill_speed");
         } else if (path.role() == erNone) {
@@ -3621,6 +3623,8 @@ std::string GCode::_before_extrude(const ExtrusionPath &path, const std::string
             comment = ";_EXTRUDE_SET_SPEED";
         if (path.role() == erExternalPerimeter)
             comment += ";_EXTERNAL_PERIMETER";
+        if (path.role() == erThinWall)
+            comment += ";_EXTERNAL_PERIMETER";
     }
     // F is mm per minute.
     gcode += m_writer.set_speed(F, "", comment);
@@ -3995,6 +3999,8 @@ GCode::extrusion_role_to_string_for_parser(const ExtrusionRole & role) {
         return "TopSolidInfill";
     case erBridgeInfill:
         return "BridgeInfill";
+    case erThinWall:
+        return "ThinWall";
     case erGapFill:
         return "GapFill";
     case erSkirt:

src/libslic3r/GCode/PreviewData.cpp

@@ -118,6 +118,7 @@ const Color GCodePreviewData::Extrusion::Default_Extrusion_Role_Colors[erCount]
     Color(1.0f, 0.0f, 1.0f, 1.0f),   // erSolidInfill
     Color(0.0f, 1.0f, 1.0f, 1.0f),   // erTopSolidInfill
     Color(0.5f, 0.5f, 0.5f, 1.0f),   // erBridgeInfill
+    Color(0.0f, 1.0f, 0.4f, 1.0f),   // erThinWall
     Color(1.0f, 1.0f, 1.0f, 1.0f),   // erGapFill
     Color(0.5f, 0.0f, 0.0f, 1.0f),   // erSkirt
     Color(0.0f, 0.5f, 0.0f, 1.0f),   // erSupportMaterial

src/libslic3r/PerimeterGenerator.cpp

@@ -613,7 +613,7 @@ void PerimeterGenerator::process()
                 // append thin walls
                 if (!thin_walls.empty()) {
                     ExtrusionEntityCollection tw = thin_variable_width
-                        (thin_walls, erExternalPerimeter, this->ext_perimeter_flow);
+                        (thin_walls, erThinWall, this->ext_perimeter_flow);
 
                     entities.append(tw.entities);
                     thin_walls.clear();
@@ -814,7 +814,7 @@ ExtrusionEntityCollection PerimeterGenerator::_traverse_loops(
     
     // append thin walls to the nearest-neighbor search (only for first iteration)
     if (!thin_walls.empty()) {
-        ExtrusionEntityCollection tw = thin_variable_width(thin_walls, erExternalPerimeter, this->ext_perimeter_flow);
+        ExtrusionEntityCollection tw = thin_variable_width(thin_walls, erThinWall, this->ext_perimeter_flow);
         coll.append(tw.entities);
         thin_walls.clear();
     }

src/libslic3r/PrintConfig.cpp

@@ -2973,6 +2973,16 @@ void PrintConfigDef::init_fff_params()
     def->min = 0;
     def->set_default_value(new ConfigOptionFloatOrPercent(50, true));
 
+    def = this->add("thin_walls_speed", coFloat);
+    def->label = L("Thin walls");
+    def->full_label = L("Thin walls speed");
+    def->category = OptionCategory::speed;
+    def->tooltip = L("Speed for thin wall (external extrusion that are alone because the obect is too thin at these places).");
+    def->sidetext = L("mm/s");
+    def->min = 0;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloat(30));
+
     def = this->add("threads", coInt);
     def->label = L("Threads");
     def->tooltip = L("Threads are used to parallelize long-running tasks. Optimal threads number "

src/libslic3r/PrintConfig.hpp

@@ -639,6 +639,7 @@ public:
     ConfigOptionBool                thin_walls;
     ConfigOptionFloatOrPercent      thin_walls_min_width;
     ConfigOptionFloatOrPercent      thin_walls_overlap;
+    ConfigOptionFloat               thin_walls_speed;
     ConfigOptionEnum<InfillPattern> top_fill_pattern;
     ConfigOptionFloatOrPercent      top_infill_extrusion_width;
     ConfigOptionInt                 top_solid_layers;
@@ -713,6 +714,7 @@ protected:
         OPT_PTR(thin_walls);
         OPT_PTR(thin_walls_min_width);
         OPT_PTR(thin_walls_overlap);
+        OPT_PTR(thin_walls_speed);
         OPT_PTR(top_fill_pattern);
         OPT_PTR(top_infill_extrusion_width);
         OPT_PTR(top_solid_infill_speed);

src/slic3r/GUI/GUI_Preview.cpp

@@ -299,6 +299,7 @@ bool Preview::init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view
         "Solid infill", "D732D7",
         "Top solid infill", "FF1A1A",
         "Bridge infill", "9999FF",
+        "Thin wall", "FFB000",
         "Gap fill", "FFFFFF",
         "Skirt", "845321",
         "Support material", "00FF00",

src/slic3r/GUI/Preset.cpp

@@ -506,7 +506,8 @@ const std::vector<std::string>& Preset::print_options()
         , "infill_not_connected"
         , "first_layer_infill_speed"
         , "thin_walls_min_width"
-        , "thin_walls_overlap"
+        , "thin_walls_overlap",
+        "thin_walls_speed"
         , "model_precision"
         , "curve_smoothing_precision"
         , "curve_smoothing_cutoff_dist"