ENH: avoid crossing wall when travel

Provide related two options to avoid crossing wall
when travel.

This is handling for github issue #106

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: I127adbb70f33c3954a08f3087e64c4e75212c7f0

src/libslic3r/GCode/AvoidCrossingPerimeters.cpp

@@ -1167,12 +1167,14 @@ Polyline AvoidCrossingPerimeters::travel_to(const GCode &gcodegen, const Point &
         travel_intersection_count = 0;
     }
 
-    const ConfigOptionFloat &opt_max_detour             = gcodegen.config().max_travel_detour_distance;
+    const ConfigOptionFloatOrPercent &opt_max_detour             = gcodegen.config().max_travel_detour_distance;
     bool                              max_detour_length_exceeded = false;
     if (opt_max_detour.value > 0) {
         double direct_length     = travel.length();
         double detour            = result_pl.length() - direct_length;
-        double max_detour_length = scale_(opt_max_detour.value);
+        double max_detour_length = opt_max_detour.percent ?
+            direct_length * 0.01 * opt_max_detour.value :
+            scale_(opt_max_detour.value);
         if (detour > max_detour_length) {
             result_pl = {start, end};
             max_detour_length_exceeded = true;

src/libslic3r/PrintConfig.cpp

@@ -455,22 +455,23 @@ void PrintConfigDef::init_fff_params()
     const int max_temp = 1500;
 
     def = this->add("reduce_crossing_wall", coBool);
-    def->label = L("Avoid crossing wall when travel");
+    def->label = L("Avoid crossing wall");
     def->category = L("Quality");
     def->tooltip = L("Detour and avoid to travel across wall which may cause blob on surface");
-    def->mode = comDevelop;
+    def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionBool(false));
 
-    def = this->add("max_travel_detour_distance", coFloat);
-    def->label = L("Max travel detour distance");
+    def = this->add("max_travel_detour_distance", coFloatOrPercent);
+    def->label = L("Avoid crossing wall - Max detour length");
     def->category = L("Quality");
     def->tooltip = L("Maximum detour distance for avoiding crossing wall. "
-                     "Don't detour if the detour distance is large than this value");
-    def->sidetext = L("mm");
+                     "Don't detour if the detour distance is large than this value. "
+                     "Detour length could be specified either as an absolute value or as percentage (for example 50%) of a direct travel path. Zero to disable");
+    def->sidetext = L("mm or %");
     def->min = 0;
     def->max_literal = 1000;
-    def->mode = comDevelop;
-    def->set_default_value(new ConfigOptionFloat(0.));
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloatOrPercent(0., false));
 
     // BBS
     def = this->add("cool_plate_temp", coInts);

src/libslic3r/PrintConfig.hpp

@@ -799,7 +799,7 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     //BBS
     ((ConfigOptionInts,               additional_cooling_fan_speed))
     ((ConfigOptionBool,               reduce_crossing_wall))
-    ((ConfigOptionFloat,              max_travel_detour_distance))
+    ((ConfigOptionFloatOrPercent,     max_travel_detour_distance))
     ((ConfigOptionPoints,             printable_area))
     //BBS: add bed_exclude_area
     ((ConfigOptionPoints,             bed_exclude_area))