Draw the path

cpp/src/gameloop.cpp

@@ -7,6 +7,8 @@
 #include "window.hpp"
 #include "user_input.hpp"
 #include "log.hpp"
+#include "pathfinder.hpp"
+#include "math.hpp"
 
 void GameLoop::Run() {
   LOG_INFO("Running the game");
@@ -16,6 +18,9 @@ void GameLoop::Run() {
 
     m_Window->ClearWindow();
 
+    // TODO wrap all of the drawing in some function
+    // TODO rethink coupling and dependencies here
+    
     // draw the map (terrain tiles)
     const Map &map = m_Game->GetMap();
     const auto &tiles = map.GetMapTiles();
@@ -29,11 +34,18 @@ void GameLoop::Run() {
       }
     }
 
+    // draw the path, if it exists
+    WorldPos start_pos = m_Game->GetPlayer()->GetPosition();
+    for (const auto& next_pos: m_Game->GetPath()) {
+      m_Window->DrawLine(start_pos, next_pos);
+      start_pos = next_pos;
+    }
+
     // draw all the entities (player etc)
     for (auto &entity : m_Game->GetEntities()) {
       m_Window->DrawSprite(entity->GetPosition(), entity->GetSprite());
     }
-
+    
     m_Window->Flush();
     // TODO measure fps
     std::this_thread::sleep_for(std::chrono::milliseconds(30));

cpp/src/pathfindingdemo.hpp

@@ -22,8 +22,9 @@ public:
   PathFindingDemo &operator=(PathFindingDemo &&) = delete;
 
   std::shared_ptr<Player> GetPlayer() { return m_Player; }
-  std::vector<std::shared_ptr<Entity>> &GetEntities() { return m_Entities; }
-  const Map &GetMap() const { return m_Map; }
+  std::vector<std::shared_ptr<Entity>>& GetEntities() { return m_Entities; }
+  const Map& GetMap() const { return m_Map; }
+  const pathfinder::Path& GetPath() const { return m_Path; }
   bool IsExitRequested() const { return m_ExitRequested; }
 
   void AddEntity(std::shared_ptr<Entity> e);

cpp/src/window.cpp

@@ -109,3 +109,10 @@ void Window::DrawCircle(const WorldPos &position, float radius) {
                     cy + static_cast<int>(std::round(radius * std::sin(a))));
   }
 }
+
+void Window::DrawLine(const WorldPos &A, const WorldPos &B)
+{
+  SDL_SetRenderDrawColor(m_Renderer.get(), 255, 0, 0, 255);
+  SDL_RenderLine(m_Renderer.get(), A.x, A.y, B.x, B.y);
+}
+

cpp/src/window.hpp

@@ -28,6 +28,7 @@ public:
   void ClearWindow();
   void Flush();
   void DrawCircle(const WorldPos &position, float radius);
+  void DrawLine(const WorldPos &A, const WorldPos &B);
 
   std::shared_ptr<SDL_Renderer> m_Renderer = nullptr;
   SDL_Window *m_Window;