Add option to enforce first layer min wall width (#1974)

Add option to set first layer min wall width

src/libslic3r/PerimeterGenerator.cpp

@@ -1784,8 +1784,13 @@ void PerimeterGenerator::process_arachne()
             if (const auto& min_feature_size_opt = object_config->min_feature_size)
                 input_params.min_feature_size = min_feature_size_opt.value * 0.01 * min_nozzle_diameter;
 
-            if (const auto& min_bead_width_opt = object_config->min_bead_width)
-                input_params.min_bead_width = min_bead_width_opt.value * 0.01 * min_nozzle_diameter;
+            if (this->layer_id == 0) {
+                if (const auto& initial_layer_min_bead_width_opt = object_config->initial_layer_min_bead_width)
+                    input_params.min_bead_width = initial_layer_min_bead_width_opt.value * 0.01 * min_nozzle_diameter;
+            } else {
+                if (const auto& min_bead_width_opt = object_config->min_bead_width)
+				    input_params.min_bead_width = min_bead_width_opt.value * 0.01 * min_nozzle_diameter;
+            }
 
             if (const auto& wall_transition_filter_deviation_opt = object_config->wall_transition_filter_deviation)
                 input_params.wall_transition_filter_deviation = wall_transition_filter_deviation_opt.value * 0.01 * min_nozzle_diameter;

src/libslic3r/Preset.cpp

@@ -765,7 +765,7 @@ static std::vector<std::string> s_Preset_print_options {
      "sparse_infill_acceleration", "internal_solid_infill_acceleration", "tree_support_adaptive_layer_height", "tree_support_auto_brim", 
      "tree_support_brim_width", "gcode_comments", "gcode_label_objects",
      "initial_layer_travel_speed", "exclude_object", "slow_down_layers", "infill_anchor", "infill_anchor_max",
-     "make_overhang_printable", "make_overhang_printable_angle", "make_overhang_printable_hole_size" ,"notes"
+     "make_overhang_printable", "make_overhang_printable_angle", "make_overhang_printable_hole_size" ,"notes" ,"initial_layer_min_bead_width"
 
 };
 

src/libslic3r/PrintConfig.cpp

@@ -3872,6 +3872,16 @@ void PrintConfigDef::init_fff_params()
     def->min = 0;
     def->set_default_value(new ConfigOptionPercent(25));
 
+    def = this->add("initial_layer_min_bead_width", coPercent);
+    def->label = L("First layer minimum wall width");
+    def->category = L("Quality");
+    def->tooltip = L("The minimum wall width that should be used for the first layer is recommended to be set "
+                     "to the same size as the nozzle. This adjustment is expected to enhance adhesion.");
+    def->sidetext = L("%");
+    def->mode = comAdvanced;
+    def->min = 0;
+    def->set_default_value(new ConfigOptionPercent(85));
+
     def = this->add("min_bead_width", coPercent);
     def->label = L("Minimum wall width");
     def->category = L("Quality");

src/libslic3r/PrintConfig.hpp

@@ -721,6 +721,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionFloat,              wall_transition_angle))
     ((ConfigOptionInt,                wall_distribution_count))
     ((ConfigOptionPercent,            min_feature_size))
+    ((ConfigOptionPercent,            initial_layer_min_bead_width))
     ((ConfigOptionPercent,            min_bead_width))
 
     // Orca