Adds rotate on stl import (#3116)

* Adds rotate on stl import

* Fixed comma placement

* update location of rotate variables

---------

Co-authored-by: SoftFever <softfeverever@gmail.com>

src/libslic3r/Preset.cpp

@@ -878,7 +878,7 @@ static std::vector<std::string> s_Preset_printer_options {
     "cooling_tube_retraction",
     "cooling_tube_length", "high_current_on_filament_swap", "parking_pos_retraction", "extra_loading_move", "purge_in_prime_tower", "enable_filament_ramming",
     "z_offset",
-    "disable_m73",
+    "disable_m73", "preferred_orientation"
     };
 
 static std::vector<std::string> s_Preset_sla_print_options {

src/libslic3r/PrintConfig.cpp

@@ -468,6 +468,15 @@ void PrintConfigDef::init_common_params()
     def->mode = comSimple;
     def->set_default_value(new ConfigOptionFloat(100.0));
 
+    def = this->add("preferred_orientation", coFloat);
+    def->label = L("Preferred orientation");
+    def->tooltip = L("Automatically orient stls on the Z-axis upon initial import");
+    def->sidetext = L("°");
+    def->max = 360;
+    def->min = -360;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloat(0.0));
+
     // Options used by physical printers
 
     def = this->add("preset_names", coStrings);

src/libslic3r/PrintConfig.hpp

@@ -1173,7 +1173,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionBools,               activate_chamber_temp_control))
     ((ConfigOptionInts ,               chamber_temperature))
     ((ConfigOptionBool,                is_infill_first))
-
+    
+    ((ConfigOptionFloat,               preferred_orientation))
 
 
 )