seam gap parameter

src/libslic3r/Fill/Fill.cpp

@@ -464,10 +464,12 @@ void Layer::make_fills(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive:
 #endif
         }
 
+        LayerRegion* layerm = this->m_regions[surface_fill.region_id];
+
         // Maximum length of the perimeter segment linking two infill lines.
         f->link_max_length = (coord_t)scale_(link_max_length);
         // Used by the concentric infill pattern to clip the loops to create extrusion paths.
-        f->loop_clipping = coord_t(scale_(surface_fill.params.flow.nozzle_diameter()) * LOOP_CLIPPING_LENGTH_OVER_NOZZLE_DIAMETER);
+        f->loop_clipping = coord_t(scale_(layerm->region().config().seam_gap.get_abs_value(surface_fill.params.flow.nozzle_diameter())));
 
         // apply half spacing using this flow's own spacing and generate infill
         FillParams params;
@@ -486,7 +488,6 @@ void Layer::make_fills(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive:
 		params.no_extrusion_overlap = surface_fill.params.overlap;
 		params.with_loop = surface_fill.params.with_loop;
 
-		LayerRegion* layerm = this->m_regions[surface_fill.region_id];
 		params.config = &layerm->region().config();
 		for (ExPolygon& expoly : surface_fill.expolygons) {
             f->no_overlap_expolygons = intersection_ex(surface_fill.no_overlap_expolygons, ExPolygons() = {expoly});

src/libslic3r/GCode.cpp

@@ -3334,8 +3334,7 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, std::string description, dou
     // if polyline was shorter than the clipping distance we'd get a null polyline, so
     // we discard it in that case
     double clip_length = m_enable_loop_clipping ?
-        scale_(EXTRUDER_CONFIG(nozzle_diameter)) * LOOP_CLIPPING_LENGTH_OVER_NOZZLE_DIAMETER :
-        0;
+    scale_(m_config.seam_gap.get_abs_value(EXTRUDER_CONFIG(nozzle_diameter))) : 0;
 
     // get paths
     ExtrusionPaths paths;

src/libslic3r/Preset.cpp

@@ -752,7 +752,7 @@ static std::vector<std::string> s_Preset_print_options {
      "small_perimeter_speed", "small_perimeter_threshold","bridge_angle", "filter_out_gap_fill", "post_process", "travel_acceleration","inner_wall_acceleration",
      "default_jerk", "outer_wall_jerk", "inner_wall_jerk", "top_surface_jerk", "initial_layer_jerk","travel_jerk",
      "top_solid_infill_flow_ratio","bottom_solid_infill_flow_ratio","only_one_wall_first_layer",
-     "print_flow_ratio"
+     "print_flow_ratio","seam_gap"
 
 };
 
@@ -777,7 +777,7 @@ static std::vector<std::string> s_Preset_filament_options {
     "filament_wipe_distance", "additional_cooling_fan_speed",
     "bed_temperature_difference", "nozzle_temperature_range_low", "nozzle_temperature_range_high",
     //SoftFever
-    "enable_pressure_advance", "pressure_advance","chamber_temperature"
+    "enable_pressure_advance", "pressure_advance","chamber_temperature" /*,"filament_seam_gap"*/
 };
 
 static std::vector<std::string> s_Preset_machine_limits_options {

src/libslic3r/Print.cpp

@@ -148,7 +148,9 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "thumbnails",
         "nozzle_hrc",
         "required_nozzle_HRC",
-        "upward_compatible_machine"
+        "upward_compatible_machine",
+        // SoftFever
+        "seam_gap"
     };
 
     static std::unordered_set<std::string> steps_ignore;

src/libslic3r/PrintConfig.cpp

@@ -2371,6 +2371,17 @@ void PrintConfigDef::init_fff_params()
     def->mode = comSimple;
     def->set_default_value(new ConfigOptionEnum<SeamPosition>(spAligned));
     
+    
+    def = this->add("seam_gap", coFloatOrPercent);
+    def->label = L("Seam gap");
+    def->tooltip = L("To avoid visible seam, the extrusion can be stoppped a bit before the end of the loop."
+                    "\nCan be a mm or a % of the current extruder diameter.");
+    def->sidetext = L("mm or %");
+    def->min = 0;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloatOrPercent(15,true));
+
+
     def = this->add("skirt_distance", coFloat);
     def->label = L("Skirt distance");
     def->tooltip = L("Distance from skirt to brim or object");
@@ -3351,7 +3362,7 @@ void PrintConfigDef::init_filament_option_keys()
         "retraction_length", "z_hop", "retraction_speed", "deretraction_speed",
         "retract_before_wipe", "retract_restart_extra", "retraction_minimum_travel", "wipe", "wipe_distance",
         "retract_when_changing_layer", "retract_length_toolchange", "retract_restart_extra_toolchange", "filament_colour",
-        "default_filament_profile"
+        "default_filament_profile"/*,"filament_seam_gap"*/
     };
 
     m_filament_retract_keys = {

src/libslic3r/PrintConfig.hpp

@@ -756,6 +756,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionBool,                 only_one_wall_first_layer))
     //SoftFever
     ((ConfigOptionFloat,                print_flow_ratio))
+    ((ConfigOptionFloatOrPercent,       seam_gap))
 )
 
 PRINT_CONFIG_CLASS_DEFINE(

src/libslic3r/PrintObject.cpp

@@ -679,7 +679,8 @@ bool PrintObject::invalidate_state_by_config_options(
             || opt_key == "only_one_wall_first_layer"
             || opt_key == "initial_layer_line_width"
             || opt_key == "inner_wall_line_width"
-            || opt_key == "infill_wall_overlap") {
+            || opt_key == "infill_wall_overlap"
+            || opt_key == "seam_gap") {
             steps.emplace_back(posPerimeters);
         } else if (opt_key == "gap_infill_speed"
             || opt_key == "filter_out_gap_fill" ) {

src/libslic3r/libslic3r.h

@@ -57,7 +57,8 @@ static constexpr double EPSILON = 1e-4;
 static constexpr double SCALING_FACTOR = 0.000001;
 static constexpr double PI = 3.141592653589793238;
 // When extruding a closed loop, the loop is interrupted and shortened a bit to reduce the seam.
-static constexpr double LOOP_CLIPPING_LENGTH_OVER_NOZZLE_DIAMETER = 0.15;
+// SoftFever: replaced by seam_gap now
+// static constexpr double LOOP_CLIPPING_LENGTH_OVER_NOZZLE_DIAMETER = 0.15;
 static constexpr double RESOLUTION = 0.0125;
 #define                 SCALED_RESOLUTION (RESOLUTION / SCALING_FACTOR)
 static constexpr double SPARSE_INFILL_RESOLUTION = 0.04;

src/slic3r/GUI/Tab.cpp

@@ -1834,6 +1834,8 @@ void TabPrint::build()
 
         optgroup = page->new_optgroup(L("Seam"), L"param_seam");
         optgroup->append_single_option_line("seam_position", "Seam");
+        optgroup->append_single_option_line("seam_gap","Seam");
+
 
         optgroup = page->new_optgroup(L("Precision"), L"param_precision");
         optgroup->append_single_option_line("slice_closing_radius");
@@ -2468,7 +2470,9 @@ void TabFilament::add_filament_overrides_page()
                                         "filament_wipe",
                                         //BBS
                                         "filament_wipe_distance",
-                                        "filament_retract_before_wipe"
+                                        "filament_retract_before_wipe",
+                                        //SoftFever
+                                        // "filament_seam_gap"
                                      })
         append_single_option_line(opt_key, extruder_idx);
 }
@@ -2499,7 +2503,9 @@ void TabFilament::update_filament_overrides_page()
                                             "filament_wipe",
                                             //BBS
                                             "filament_wipe_distance",
-                                            "filament_retract_before_wipe"
+                                            "filament_retract_before_wipe",
+                                            //SoftFever
+                                            // "filament_seam_gap"
                                         };
 
     const int extruder_idx = 0; // #ys_FIXME