Added brim width setting for tree support

src/libslic3r/Preset.cpp

@@ -754,8 +754,8 @@ static std::vector<std::string> s_Preset_print_options {
      "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",
     "bridge_density", "precise_outer_wall", "overhang_speed_classic", "bridge_acceleration",
-    "sparse_infill_acceleration", "internal_solid_infill_acceleration", "tree_support_adaptive_layer_height",
-    "gcode_comments", "gcode_label_objects"
+    "sparse_infill_acceleration", "internal_solid_infill_acceleration", "tree_support_adaptive_layer_height", "tree_support_auto_brim", 
+    "tree_support_brim_width", "gcode_comments", "gcode_label_objects"
 
 };
 

src/libslic3r/PrintConfig.cpp

@@ -3049,6 +3049,19 @@ void PrintConfigDef::init_fff_params()
     def->category = L("Quality");
     def->tooltip = L("Enabling this option means the height of  tree support layer except the first will be automatically calculated ");
     def->set_default_value(new ConfigOptionBool(1));
+    
+    def = this->add("tree_support_auto_brim", coBool);
+    def->label = L("Auto brim width");
+    def->category = L("Quality");
+    def->tooltip = L("Enabling this option means the width of the brim for tree support will be automatically calculated");
+    def->set_default_value(new ConfigOptionBool(1));
+    
+    def = this->add("tree_support_brim_width", coFloat);
+    def->label = L("Tree support brim width");
+    def->category = L("Quality");
+    def->min      = 0.0;
+    def->tooltip = L("Distance from tree branch to the outermost brim line");
+    def->set_default_value(new ConfigOptionFloat(3));
 
     def           = this->add("tree_support_branch_diameter", coFloat);
     def->label    = L("Tree support branch diameter");

src/libslic3r/PrintConfig.hpp

@@ -691,6 +691,8 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionFloat,              tree_support_branch_angle))
     ((ConfigOptionInt,                tree_support_wall_count))
     ((ConfigOptionBool,               tree_support_adaptive_layer_height))
+    ((ConfigOptionBool,               tree_support_auto_brim))
+    ((ConfigOptionFloat,              tree_support_brim_width))
     ((ConfigOptionBool,               detect_narrow_internal_solid_infill))
     // ((ConfigOptionBool,               adaptive_layer_height))
     ((ConfigOptionFloat,              support_bottom_interface_spacing))

src/libslic3r/PrintObject.cpp

@@ -775,6 +775,8 @@ bool PrintObject::invalidate_state_by_config_options(
             || opt_key == "max_bridge_length"
             || opt_key == "initial_layer_line_width"
             || opt_key == "tree_support_adaptive_layer_height"
+            || opt_key == "tree_support_auto_brim"
+            || opt_key == "tree_support_brim_width"
             || opt_key == "tree_support_branch_distance"
             || opt_key == "tree_support_branch_diameter"
             || opt_key == "tree_support_branch_angle"

src/libslic3r/TreeSupport.cpp

@@ -2161,7 +2161,11 @@ void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_no
                             }
                         }
                         if (layer_nr == 0 && m_raft_layers == 0) {
-                            double brim_width = layers_to_top * layer_height / (scale * branch_radius) * 0.5;
+                            double brim_width =
+                                config.tree_support_auto_brim
+                                    ? layers_to_top * layer_height /
+                                          (scale * branch_radius) * 0.5
+                                    : config.tree_support_brim_width;
                             circle = offset(circle, scale_(brim_width))[0];
                         }
                         area.emplace_back(ExPolygon(circle));