Add "Manual filament change" option and logic

src/libslic3r/GCode.cpp

@@ -5420,7 +5420,8 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
     // Process the custom change_filament_gcode.
     const std::string& change_filament_gcode = m_config.change_filament_gcode.value;
     std::string toolchange_gcode_parsed;
-    if (!change_filament_gcode.empty()) {
+    //Orca: Ignore change_filament_gcode if is the first call for a tool change and manual_filament_change is enabled
+    if (!change_filament_gcode.empty() && !(m_config.manual_filament_change.value && m_toolchange_count == 1)) {
         toolchange_gcode_parsed = placeholder_parser_process("change_filament_gcode", change_filament_gcode, extruder_id, &dyn_config);
         check_add_eol(toolchange_gcode_parsed);
         gcode += toolchange_gcode_parsed;

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -60,6 +60,7 @@ const std::vector<std::string> GCodeProcessor::Reserved_Tags = {
     "_GP_LAST_LINE_M73_PLACEHOLDER",
     "_GP_ESTIMATED_PRINTING_TIME_PLACEHOLDER",
     "_GP_TOTAL_LAYER_NUMBER_PLACEHOLDER",
+    " MANUAL_TOOL_CHANGE ",
     "_DURING_PRINT_EXHAUST_FAN"
 };
 
@@ -76,7 +77,8 @@ const std::vector<std::string> GCodeProcessor::Reserved_Tags_compatible = {
     "_GP_FIRST_LINE_M73_PLACEHOLDER",
     "_GP_LAST_LINE_M73_PLACEHOLDER",
     "_GP_ESTIMATED_PRINTING_TIME_PLACEHOLDER",
-    "_GP_TOTAL_LAYER_NUMBER_PLACEHOLDER"
+    "_GP_TOTAL_LAYER_NUMBER_PLACEHOLDER",
+    " MANUAL_TOOL_CHANGE "
 };
 
 
@@ -1016,7 +1018,9 @@ void GCodeProcessor::apply_config(const PrintConfig& config)
     if (spiral_vase != nullptr)
         m_spiral_vase_active = spiral_vase->value;
 
-
+    const ConfigOptionBool* manual_filament_change = config.option<ConfigOptionBool>("manual_filament_change");
+    if (manual_filament_change != nullptr)
+        m_manual_filament_change = manual_filament_change->value;
 }
 
 void GCodeProcessor::apply_config(const DynamicPrintConfig& config)
@@ -2114,6 +2118,13 @@ void GCodeProcessor::process_tags(const std::string_view comment, bool producers
                 BOOST_LOG_TRIVIAL(error) << "GCodeProcessor encountered an invalid value for Width (" << comment << ").";
             return;
         }
+        // Orca: manual tool change tag
+        if (m_manual_filament_change && boost::starts_with(comment, reserved_tag(ETags::Manual_Tool_Change))) {
+            std::string_view tool_change_cmd = comment.substr(reserved_tag(ETags::Manual_Tool_Change).length());
+            if (boost::starts_with(tool_change_cmd, "T")) {
+                process_T(tool_change_cmd);
+            }
+        }
     }
 
     // color change tag

src/libslic3r/GCode/GCodeProcessor.hpp

@@ -261,6 +261,7 @@ namespace Slic3r {
             Last_Line_M73_Placeholder,
             Estimated_Printing_Time_Placeholder,
             Total_Layer_Number_Placeholder,
+            Manual_Tool_Change,
             During_Print_Exhaust_Fan
         };
 
@@ -638,6 +639,7 @@ namespace Slic3r {
         bool m_wiping;
         bool m_flushing;
         float m_remaining_volume;
+        bool m_manual_filament_change;
 
         //BBS: x, y offset for gcode generated
         double          m_x_offset{ 0 };

src/libslic3r/GCodeWriter.cpp

@@ -5,6 +5,7 @@
 #include <iostream>
 #include <map>
 #include <assert.h>
+#include <GCode/GCodeProcessor.hpp>
 
 #ifdef __APPLE__
     #include <boost/spirit/include/karma.hpp>
@@ -308,7 +309,8 @@ std::string GCodeWriter::update_progress(unsigned int num, unsigned int tot, boo
 
 std::string GCodeWriter::toolchange_prefix() const
 {
-    return FLAVOR_IS(gcfMakerWare) ? "M135 T" :
+    return config.manual_filament_change ? ";" + GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Manual_Tool_Change) + "T":
+           FLAVOR_IS(gcfMakerWare) ? "M135 T" :
            FLAVOR_IS(gcfSailfish)  ? "M108 T" : "T";
 }
 

src/libslic3r/Preset.cpp

@@ -811,7 +811,7 @@ static std::vector<std::string> s_Preset_printer_options {
     "printer_technology",
     "printable_area", "bed_exclude_area","bed_custom_texture", "bed_custom_model", "gcode_flavor",
     "fan_kickstart", "fan_speedup_time", "fan_speedup_overhangs",
-    "single_extruder_multi_material", "machine_start_gcode", "machine_end_gcode", "before_layer_change_gcode", "layer_change_gcode", "time_lapse_gcode", "change_filament_gcode",
+    "single_extruder_multi_material", "manual_filament_change", "machine_start_gcode", "machine_end_gcode", "before_layer_change_gcode", "layer_change_gcode", "time_lapse_gcode", "change_filament_gcode",
     "printer_model", "printer_variant", "printable_height", "extruder_clearance_radius", "extruder_clearance_height_to_lid", "extruder_clearance_height_to_rod",
     "default_print_profile", "inherits",
     "silent_mode",

src/libslic3r/PrintConfig.cpp

@@ -3332,6 +3332,14 @@ def = this->add("filament_loading_speed", coFloats);
     def->readonly = true;
     def->set_default_value(new ConfigOptionBool(true));
 
+    def = this->add("manual_filament_change", coBool);
+    def->label = L("Manual Filament Change");
+    def->tooltip = L("Enable this option to omit the custom Change filament G-code only at the beginning of the print. "
+                    "The tool change command (e.g., T0) will be skipped throughout the entire print. "
+                    "This is useful for manual multi-material printing, where we use M600/PAUSE to trigger the manual filament change action.");
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionBool(false));
+
     def = this->add("purge_in_prime_tower", coBool);
     def->label = L("Purge in prime tower");
     def->tooltip = L("Purge remaining filament into prime tower");

src/libslic3r/PrintConfig.hpp

@@ -920,6 +920,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionString,              machine_start_gcode))
     ((ConfigOptionStrings,             filament_start_gcode))
     ((ConfigOptionBool,                single_extruder_multi_material))
+    ((ConfigOptionBool,                manual_filament_change))
     ((ConfigOptionBool,                single_extruder_multi_material_priming))
     ((ConfigOptionBool,                wipe_tower_no_sparse_layers))
     ((ConfigOptionString,              change_filament_gcode))

src/slic3r/GUI/Tab.cpp

@@ -3478,6 +3478,8 @@ void TabPrinter::build_unregular_pages(bool from_initial_build/* = false*/)
                 }
             });
         };
+        optgroup->append_single_option_line("manual_filament_change");
+
         optgroup = page->new_optgroup(L("Wipe tower"));
         optgroup->append_single_option_line("purge_in_prime_tower");
         optgroup->append_single_option_line("enable_filament_ramming");