ENH: add "ensure_vertical_shell_thickness" back

See the new requirement of the latest update at
github issue #317

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: I68c9922a272b1d426126a531bfdee7a4f7e53620

src/libslic3r/Preset.cpp

@@ -692,7 +692,7 @@ bool Preset::is_custom_defined()
 static std::vector<std::string> s_Preset_print_options {
     "layer_height", "initial_layer_print_height", "wall_loops", "slice_closing_radius", "spiral_mode",
     "top_shell_layers", "top_shell_thickness", "bottom_shell_layers", "bottom_shell_thickness",
-    "reduce_crossing_wall", "detect_thin_wall", "detect_overhang_wall",
+    "ensure_vertical_shell_thickness", "reduce_crossing_wall", "detect_thin_wall", "detect_overhang_wall",
     "seam_position", "wall_infill_order", "sparse_infill_density", "sparse_infill_pattern", "top_surface_pattern", "bottom_surface_pattern",
     "infill_direction", "bridge_angle",
     "minimum_sparse_infill_area", "reduce_infill_retraction",

src/libslic3r/Print.hpp

@@ -515,7 +515,6 @@ private:
     // This was a per-object setting and now we default enable it.
     static bool clip_multipart_objects;
     static bool infill_only_where_needed;
-    static bool ensure_vertical_shell_thickness;
 };
 
 struct WipeTowerData

src/libslic3r/PrintConfig.cpp

@@ -904,6 +904,14 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionStrings { " " });
 
+    def = this->add("ensure_vertical_shell_thickness", coBool);
+    def->label = L("Ensure vertical shell thickness");
+    def->category = L("Strength");
+    def->tooltip = L("Add solid infill near sloping surfaces to guarantee the vertical shell thickness "
+        "(top+bottom solid layers)");
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionBool(true));
+
     auto def_top_fill_pattern = def = this->add("top_surface_pattern", coEnum);
     def->label = L("Top surface pattern");
     def->category = L("Strength");

src/libslic3r/PrintConfig.hpp

@@ -661,6 +661,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionFloat,                bridge_angle))
     ((ConfigOptionFloat,                bridge_flow))
     ((ConfigOptionFloat,                bridge_speed))
+    ((ConfigOptionBool,                 ensure_vertical_shell_thickness))
     ((ConfigOptionEnum<InfillPattern>,  top_surface_pattern))
     ((ConfigOptionEnum<InfillPattern>,  bottom_surface_pattern))
     ((ConfigOptionFloat,                outer_wall_line_width))

src/libslic3r/PrintObject.cpp

@@ -770,6 +770,7 @@ bool PrintObject::invalidate_state_by_config_options(
             || opt_key == "sparse_infill_filament"
             || opt_key == "solid_infill_filament"
             || opt_key == "sparse_infill_line_width"
+            || opt_key == "ensure_vertical_shell_thickness"
             || opt_key == "bridge_angle") {
             steps.emplace_back(posPrepareInfill);
         } else if (
@@ -1224,9 +1225,7 @@ void PrintObject::discover_vertical_shells()
         bool has_extra_layers = false;
         for (size_t region_id = 0; region_id < this->num_printing_regions(); ++region_id) {
             const PrintRegionConfig &config = this->printing_region(region_id).config();
-            //BBS
-            //if (config.ensure_vertical_shell_thickness.value && has_extra_layers_fn(config)) {
-            if (PrintObject::ensure_vertical_shell_thickness && has_extra_layers_fn(config)) {
+            if (config.ensure_vertical_shell_thickness.value && has_extra_layers_fn(config)) {
                 has_extra_layers = true;
                 break;
             }
@@ -1306,9 +1305,7 @@ void PrintObject::discover_vertical_shells()
         PROFILE_BLOCK(discover_vertical_shells_region);
 
         const PrintRegion &region = this->printing_region(region_id);
-        //BBS
-        //if (! region.config().ensure_vertical_shell_thickness.value)
-        if (! PrintObject::ensure_vertical_shell_thickness)
+        if (! region.config().ensure_vertical_shell_thickness.value)
             // This region will be handled by discover_horizontal_shells().
             continue;
         if (! has_extra_layers_fn(region.config()))
@@ -2049,9 +2046,7 @@ void PrintObject::discover_horizontal_shells()
 #endif
 
             // If ensure_vertical_shell_thickness, then the rest has already been performed by discover_vertical_shells().
-            //BBS
-            //if (region_config.ensure_vertical_shell_thickness.value)
-            if (PrintObject::ensure_vertical_shell_thickness)
+            if (region_config.ensure_vertical_shell_thickness.value)
                 continue;
 
             coordf_t print_z  = layer->print_z;

src/libslic3r/PrintObjectSlice.cpp

@@ -18,7 +18,6 @@ namespace Slic3r {
 
 bool PrintObject::clip_multipart_objects = true;
 bool PrintObject::infill_only_where_needed = false;
-bool PrintObject::ensure_vertical_shell_thickness = true;
 
 LayerPtrs new_layers(
     PrintObject                 *print_object,