Deselect all entities on re-selection

cpp/src/entities.hpp

@@ -67,6 +67,10 @@ public:
 
   bool IsCollisionBoxVisible() const { return m_CollisionBoxVisible; }
 
+  void Select() { m_Selected = true; }
+  void Deselect() { m_Selected = false; }
+  bool IsSelected() const { return m_Selected; }
+
 protected:
   WorldPos m_Position;
   WorldPos m_ActualVelocity;
@@ -76,6 +80,7 @@ protected:
 private:
   bool m_FlagExpired = false;
   bool m_CollisionBoxVisible = true;
+  bool m_Selected = false;
 };
 
 class Player final : public Entity {

cpp/src/gameloop.cpp

@@ -50,7 +50,12 @@ void GameLoop::Draw() {
     if (entity->IsCollisionBoxVisible())
     {
       float collision_radius = camera.WorldToWindowSize(entity->GetCollisionRadius());
-      m_Window->DrawCircle(entity_pos, collision_radius);
+      m_Window->DrawCircle(entity_pos, collision_radius, 255, 0, 0);
+    }
+    if (entity->IsSelected())
+    {
+      float collision_radius = camera.WorldToWindowSize(entity->GetCollisionRadius());
+      m_Window->DrawCircle(entity_pos, collision_radius, 0, 255, 0);
     }
   }
 

cpp/src/pathfindingdemo.cpp

@@ -229,10 +229,21 @@ void PathFindingDemo::HandleActions(const std::vector<UserAction> &actions)
   };
 }
 
+void PathFindingDemo::DeselectEntities()
+{
+  std::for_each(m_SelectedEntities.begin(), m_SelectedEntities.end(), [](auto& x)
+      {
+        if (auto entity = x.lock())
+        entity->Deselect();
+      }
+  );
+  m_SelectedEntities.clear();
+}
+
 void PathFindingDemo::SelectEntitiesInRectangle(WorldPos A, WorldPos B)
 {
+  DeselectEntities();
   // TODO use colliders for this
-  m_SelectedEntities.clear();
   auto [x_min, x_max] = std::minmax(A.x(), B.x());
   auto [y_min, y_max] = std::minmax(A.y(), B.y());
   for (const auto& entity : m_Entities)
@@ -243,6 +254,7 @@ void PathFindingDemo::SelectEntitiesInRectangle(WorldPos A, WorldPos B)
     if (x_in_range && y_in_range)
     {
       m_SelectedEntities.push_back(std::weak_ptr(entity));
+      entity->Select();
     }
   }
   LOG_INFO("Selected ", m_SelectedEntities.size(), " entities");

cpp/src/pathfindingdemo.hpp

@@ -43,8 +43,10 @@ public:
   WorldPos GetRandomPosition() const;
 
   void SelectEntitiesInRectangle(WorldPos A, WorldPos B);
+  void DeselectEntities();
   bool IsSelectionBoxActive() const { return m_SelectionBox.active; }
   std::pair<WindowPos, WindowSize> GetSelectionBoxPosSize();
+  std::vector<std::weak_ptr<Entity>> GetSelectedEntities() { return m_SelectedEntities; }
 
 private:
   const std::vector<Collision>& GetEntityCollisions();

cpp/src/window.cpp

@@ -104,10 +104,11 @@ void Window::ClearWindow() {
 
 void Window::Flush() { SDL_RenderPresent(m_Renderer.get()); }
 
-void Window::DrawCircle(const WindowPos &position, float radius) {
+// TODO use some struct for color
+void Window::DrawCircle(const WindowPos &position, float radius, uint8_t R, uint8_t G, uint8_t B) {
   int cx = static_cast<int>(position.x());
   int cy = static_cast<int>(position.y());
-  SDL_SetRenderDrawColor(m_Renderer.get(), 255, 0, 0, 255);
+  SDL_SetRenderDrawColor(m_Renderer.get(), R, G, B, 255);
   for (int i = 0; i < 360; ++i) {
     double a = i * M_PI / 180.0;
     SDL_RenderPoint(m_Renderer.get(),

cpp/src/window.hpp

@@ -28,7 +28,7 @@ public:
   void DrawRect(const WindowPos &position, const WindowSize size, uint8_t R, uint8_t G, uint8_t B);
   void ClearWindow();
   void Flush();
-  void DrawCircle(const WindowPos &position, float radius);
+  void DrawCircle(const WindowPos &position, float radius, uint8_t R, uint8_t G, uint8_t B);
   void DrawLine(const WindowPos &A, const WindowPos &B);
 
 private: