Enhancement: Internal Bridge angle override (#7908)

Internal Bridge angle override

src/libslic3r/Preset.cpp

@@ -820,7 +820,7 @@ static std::vector<std::string> s_Preset_print_options {
      "timelapse_type",
      "wall_generator", "wall_transition_length", "wall_transition_filter_deviation", "wall_transition_angle",
      "wall_distribution_count", "min_feature_size", "min_bead_width", "post_process", "min_length_factor",
-     "small_perimeter_speed", "small_perimeter_threshold","bridge_angle", "filter_out_gap_fill", "travel_acceleration","inner_wall_acceleration", "min_width_top_surface",
+     "small_perimeter_speed", "small_perimeter_threshold","bridge_angle","internal_bridge_angle", "filter_out_gap_fill", "travel_acceleration","inner_wall_acceleration", "min_width_top_surface",
      "default_jerk", "outer_wall_jerk", "inner_wall_jerk", "infill_jerk", "top_surface_jerk", "initial_layer_jerk","travel_jerk",
      "top_solid_infill_flow_ratio","bottom_solid_infill_flow_ratio","only_one_wall_first_layer", "print_flow_ratio", "seam_gap",
      "role_based_wipe_speed", "wipe_speed", "accel_to_decel_enable", "accel_to_decel_factor", "wipe_on_loops", "wipe_before_external_loop",

src/libslic3r/PrintConfig.cpp

@@ -950,7 +950,7 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionEnumsGeneric{ (int)Overhang_threshold_bridge });
 
     def = this->add("bridge_angle", coFloat);
-    def->label = L("Bridge infill direction");
+    def->label = L("External bridge infill direction");
     def->category = L("Strength");
     def->tooltip = L("Bridging angle override. If left to zero, the bridging angle will be calculated "
         "automatically. Otherwise the provided angle will be used for external bridges. "
@@ -959,6 +959,18 @@ void PrintConfigDef::init_fff_params()
     def->min = 0;
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloat(0.));
+    
+    // ORCA: Internal bridge angle override
+    def = this->add("internal_bridge_angle", coFloat);
+    def->label = L("Internal bridge infill direction");
+    def->category = L("Strength");
+    def->tooltip = L("Internal bridging angle override. If left to zero, the bridging angle will be calculated "
+        "automatically. Otherwise the provided angle will be used for internal bridges. "
+        "Use 180°for zero angle.\n\n It is recommended to leave it at 0 unless there is a specific model need not to.");
+    def->sidetext = L("°");
+    def->min = 0;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloat(0.));
 
     def = this->add("bridge_density", coPercent);
     def->label = L("Bridge density");

src/libslic3r/PrintConfig.hpp

@@ -907,6 +907,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionInt,                  bottom_shell_layers))
     ((ConfigOptionFloat,                bottom_shell_thickness))
     ((ConfigOptionFloat,                bridge_angle))
+    ((ConfigOptionFloat,                internal_bridge_angle)) // ORCA: Internal bridge angle override
     ((ConfigOptionFloat,                bridge_flow))
     ((ConfigOptionFloat,                internal_bridge_flow))
     ((ConfigOptionFloat,                bridge_speed))

src/libslic3r/PrintObject.cpp

@@ -1079,6 +1079,7 @@ bool PrintObject::invalidate_state_by_config_options(
             || opt_key == "rotate_solid_infill_direction"
             || opt_key == "ensure_vertical_shell_thickness"
             || opt_key == "bridge_angle"
+            || opt_key == "internal_bridge_angle" // ORCA: Internal bridge angle override
             //BBS
             || opt_key == "bridge_density") {
             steps.emplace_back(posPrepareInfill);
@@ -2743,6 +2744,10 @@ void PrintObject::bridge_over_infill()
                         // Also, use Infill pattern that is neutral for angle determination, since there are no infill lines.
                         bridging_angle = determine_bridging_angle(area_to_be_bridge, to_lines(boundary_plines), InfillPattern::ipLine, 0);
                     }
+                    
+                    // ORCA: Internal bridge angle override
+                    if (candidate.region->region().config().internal_bridge_angle > 0)
+                        bridging_angle = candidate.region->region().config().internal_bridge_angle.value * PI / 180.0; // Convert degrees to radians
 
                     boundary_plines.insert(boundary_plines.end(), anchors.begin(), anchors.end());
                     if (!lightning_area.empty() && !intersection(area_to_be_bridge, lightning_area).empty()) {