Make npcs not die inside when stuck but use reverse strategy again

src/game/npc_character.cpp

@@ -15,6 +15,7 @@ void game::NpcCharacter::VehicleChanged()
     path_.clear();
     gas_ = false;
     stuck_counter_ = 0;
+    vehicle_state_ = NVT_NORMAL;
     speed_limit_ = 0.0f;
 
     if (GetVehicle() && IsDriver())
@@ -87,6 +88,22 @@ void game::NpcCharacter::VehicleThink()
     if (!IsDriver() || !GetVehicle() || !roads_)
         return;
 
+    if (vehicle_state_ == NVT_REVERSING)
+    {
+        if (reversing_frames_ > 0)
+        {
+            --reversing_frames_;
+        }
+        else
+        {
+            vehicle_state_ = NVT_NORMAL;
+            stuck_counter_ = 0;
+            vehicle_->SetInput(game::VIN_BACKWARD, false);
+        }
+        return;
+    }
+
+
     const auto& vehicle_trans = GetVehicle()->GetRootTransform();
 
     const glm::vec3& pos = vehicle_trans.position;
@@ -203,8 +220,14 @@ void game::NpcCharacter::VehicleThink()
             //    BotThink(s);
             //});
 
-            GetVehicle()->SetInputs(0); // stop
-            is_driver_ = false; // TODO: fix 
+            vehicle_->SetSteering(true, -angle); // try turn away while reversing
+            vehicle_->SetInputs(0); // stop
+            vehicle_->SetInput(game::VIN_BACKWARD, true);
+            vehicle_state_ = NVT_REVERSING;
+            reversing_frames_ = 50; // reverse for 50 frames
+
+            // GetVehicle()->SetInputs(0); // stop
+            // is_driver_ = false; // TODO: fix 
             return;
         }
     }

src/game/npc_character.hpp

@@ -8,6 +8,12 @@ namespace game
 
 class OpenWorld;
 
+enum NpcVehicleThinkState
+{
+    NVT_NORMAL,
+    NVT_REVERSING,
+};
+
 class NpcCharacter : public ControllableCharacter
 {
 public:
@@ -32,11 +38,13 @@ private:
 private:
 
     // driver
+    NpcVehicleThinkState vehicle_state_ = NVT_NORMAL;
     const assets::MapGraph* roads_;
     glm::vec3 seg_start_;
     std::deque<size_t> path_;
     bool gas_ = false;
     size_t stuck_counter_ = 0;
+    size_t reversing_frames_ = 0;
     glm::vec3 last_pos_ = glm::vec3(0.0f);
     float speed_limit_ = 0.0f;
 };