Removed the unsupported "pillars" support pattern.

xs/src/libslic3r/PrintConfig.cpp

@@ -1527,12 +1527,10 @@ PrintConfigDef::PrintConfigDef()
     def->enum_values.push_back("rectilinear");
     def->enum_values.push_back("rectilinear-grid");
     def->enum_values.push_back("honeycomb");
-    def->enum_values.push_back("pillars");
     def->enum_labels.push_back("rectilinear");
     def->enum_labels.push_back("rectilinear grid");
     def->enum_labels.push_back("honeycomb");
-    def->enum_labels.push_back("pillars");
-    def->default_value = new ConfigOptionEnum<SupportMaterialPattern>(smpPillars);
+    def->default_value = new ConfigOptionEnum<SupportMaterialPattern>(smpRectilinear);
 
     def = this->add("support_material_spacing", coFloat);
     def->label = L("Pattern spacing");
@@ -1804,6 +1802,9 @@ void PrintConfigDef::handle_legacy(t_config_option_key &opt_key, std::string &va
             values is a dirty hack and will need to be removed sometime in the future, but it
             will avoid lots of complaints for now. */
         value = "0";
+    } else if (opt_key == "support_material_pattern" && value == "pillars") {
+        // Slic3r PE does not support the pillars. They never worked well.
+        value = "rectilinear";
     } else if (opt_key == "support_material_threshold" && value == "0") {
         // 0 used to be automatic threshold, but we introduced percent values so let's
         // transform it into the default value

xs/src/libslic3r/PrintConfig.hpp

@@ -33,7 +33,7 @@ enum InfillPattern {
 };
 
 enum SupportMaterialPattern {
-    smpRectilinear, smpRectilinearGrid, smpHoneycomb, smpPillars,
+    smpRectilinear, smpRectilinearGrid, smpHoneycomb,
 };
 
 enum SeamPosition {
@@ -87,7 +87,6 @@ template<> inline t_config_enum_values& ConfigOptionEnum<SupportMaterialPattern>
         keys_map["rectilinear"]         = smpRectilinear;
         keys_map["rectilinear-grid"]    = smpRectilinearGrid;
         keys_map["honeycomb"]           = smpHoneycomb;
-        keys_map["pillars"]             = smpPillars;
     }
     return keys_map;
 }

xs/src/libslic3r/SupportMaterial.cpp

@@ -2491,7 +2491,6 @@ void PrintObjectSupportMaterial::generate_toolpaths(
         infill_pattern = ipRectilinear;
         break;
     case smpHoneycomb:
-    case smpPillars:
         infill_pattern = ipHoneycomb;
         break;
     }