parse road's rule attribute (driving direction) #74

Author: pageldev

include/Road.h

@@ -79,7 +79,7 @@ struct SpeedRecord : public XmlNode
 class Road : public XmlNode
 {
 public:
-    Road(std::string id, double length, std::string junction, std::string name);
+    Road(std::string id, double length, std::string junction, std::string name, bool left_hand_traffic = false);
 
     std::vector<LaneSection> get_lanesections() const;
     std::vector<RoadObject>  get_road_objects() const;
@@ -114,6 +114,7 @@ class Road : public XmlNode
     std::string id = "";
     std::string junction = "";
     std::string name = "";
+    bool        left_hand_traffic = false;
 
     RoadLink                  predecessor;
     RoadLink                  successor;

src/OpenDriveMap.cpp

@@ -148,13 +148,17 @@ OpenDriveMap::OpenDriveMap(const std::string& xodr_file,
     {
         /* make road */
         const std::string road_id = road_node.attribute("id").as_string("");
+        std::string       rule_str = std::string(road_node.attribute("rule").as_string("RHT"));
+        std::transform(rule_str.begin(), rule_str.end(), rule_str.begin(), [](unsigned char c) { return std::tolower(c); });
+        const bool is_left_hand_traffic = (rule_str == "lht");
 
         Road& road = this->id_to_road
                          .insert({road_id,
                                   Road(road_id,
                                        road_node.attribute("length").as_double(0.0),
                                        road_node.attribute("junction").as_string(""),
-                                       road_node.attribute("name").as_string(""))})
+                                       road_node.attribute("name").as_string(""),
+                                       is_left_hand_traffic)})
                          .first->second;
         road.xml_node = road_node;
 

src/Road.cpp

@@ -55,8 +55,8 @@ std::vector<RoadObject> Road::get_road_objects() const { return get_map_values(t
 
 std::vector<Signal> Road::get_signals() const { return get_map_values(this->id_to_signal); }
 
-Road::Road(std::string id, double length, std::string junction, std::string name) :
-    length(length), id(id), junction(junction), name(name), ref_line(id, length)
+Road::Road(std::string id, double length, std::string junction, std::string name, bool left_hand_traffic) :
+    length(length), id(id), junction(junction), name(name), left_hand_traffic(left_hand_traffic), ref_line(id, length)
 {
 }