ENH: add back infill anchor for special case

These two settings is necessary for some
specific user case.

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: I9d70679932ac90c34296393d0e8bb8aebd8ebe48

src/libslic3r/PrintConfig.cpp

@@ -1571,6 +1571,62 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionBool(false));
 
+    auto def_infill_anchor_min = def = this->add("sparse_infill_anchor", coFloatOrPercent);
+    def->label = L("Length of sparse infill anchor");
+    def->category = L("Strength");
+    def->tooltip = L("Connect a sparse infill line to an internal perimeter with a short segment of an additional perimeter. "
+        "If expressed as percentage (example: 15%) it is calculated over sparse infill line width. "
+        "Slicer tries to connect two close infill lines to a short perimeter segment. If no such perimeter segment "
+        "shorter than infill_anchor_max is found, the infill line is connected to a perimeter segment at just one side "
+        "and the length of the perimeter segment taken is limited to this parameter, but no longer than anchor_length_max. "
+        "Set this parameter to zero to disable anchoring perimeters connected to a single infill line.");
+    def->sidetext = L("mm or %");
+    def->ratio_over = "sparse_infill_line_width";
+    def->max_literal = 1000;
+    def->gui_type = ConfigOptionDef::GUIType::f_enum_open;
+    def->enum_values.push_back("0");
+    def->enum_values.push_back("1");
+    def->enum_values.push_back("2");
+    def->enum_values.push_back("5");
+    def->enum_values.push_back("10");
+    def->enum_values.push_back("1000");
+    def->enum_labels.push_back(L("0 (no open anchors)"));
+    def->enum_labels.push_back("1 mm");
+    def->enum_labels.push_back("2 mm");
+    def->enum_labels.push_back("5 mm");
+    def->enum_labels.push_back("10 mm");
+    def->enum_labels.push_back(L("1000 (unlimited)"));
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloatOrPercent(400, true));
+
+    def = this->add("sparse_infill_anchor_max", coFloatOrPercent);
+    def->label = L("Maximum length of sparse infill anchor");
+    def->category = def_infill_anchor_min->category;
+    def->tooltip = L("Connect a sparse infill line to an internal perimeter with a short segment of an additional perimeter. "
+        "If expressed as percentage (example: 15%) it is calculated over sparse infill line width. "
+        "Slicer tries to connect two close infill lines to a short perimeter segment. If no such perimeter segment "
+        "shorter than this parameter is found, the infill line is connected to a perimeter segment at just one side "
+        "and the length of the perimeter segment taken is limited to infill_anchor, but no longer than this parameter. "
+        "Set this parameter to zero to disable anchoring.");
+    def->sidetext = def_infill_anchor_min->sidetext;
+    def->ratio_over = def_infill_anchor_min->ratio_over;
+    def->max_literal = def_infill_anchor_min->max_literal;
+    def->gui_type = def_infill_anchor_min->gui_type;
+    def->enum_values.push_back("0");
+    def->enum_values.push_back("1");
+    def->enum_values.push_back("2");
+    def->enum_values.push_back("5");
+    def->enum_values.push_back("10");
+    def->enum_values.push_back("1000");
+    def->enum_labels.push_back(L("0 (not anchored)"));
+    def->enum_labels.push_back("1 mm");
+    def->enum_labels.push_back("2 mm");
+    def->enum_labels.push_back("5 mm");
+    def->enum_labels.push_back("10 mm");
+    def->enum_labels.push_back(L("1000 (unlimited)"));
+    def->mode = def_infill_anchor_min->mode;
+    def->set_default_value(new ConfigOptionFloatOrPercent(20, false));
+
     def = this->add("sparse_infill_filament", coInt);
     def->label = L("Infill");
     def->category = L("Extruders");
@@ -3935,6 +3991,10 @@ void PrintConfigDef::handle_legacy(t_config_option_key &opt_key, std::string &va
         value = "tree(auto)";
     } else if (opt_key == "support_base_pattern" && value == "none") {
         value = "hollow";
+    } else if (opt_key == "infill_anchor") {
+        opt_key = "sparse_infill_anchor";
+    } else if (opt_key == "infill_anchor_max") {
+        opt_key = "sparse_infill_anchor_max";
     } else if (opt_key == "different_settings_to_system") {
         std::string copy_value = value;
         copy_value.erase(std::remove(copy_value.begin(), copy_value.end(), '\"'), copy_value.end()); // remove '"' in string