Finish Snow::Manager implementation

src/snow/manager.cpp

@@ -4,8 +4,29 @@
 namespace Snow {
 
 Manager::Manager() = default;
+Manager::~Manager() = default;
 
-void Manager::NewSnow() { std::make_unique<Snow>(); }
-void Manager::Update() {}
+void Manager::NewSnow() { snows.push_back(std::make_unique<Snow>()); }
+
+void Manager::Update() {
+  for (auto snowi = 0; snowi < snows.size(); snowi++) {
+    auto &snow = snows[snowi];
+    if (!snow->IsAlive()) {
+      Kill(snowi);
+      continue;
+    }
+    snow->Update();
+  }
+}
+
+void Manager::Draw() {
+  for (auto snowi = 0; snowi < snows.size(); snowi++)
+    snows[snowi]->Draw();
+}
+
+void Manager::Kill(uint pos) {
+  std::swap(snows[pos], snows.back());
+  snows.pop_back();
+}
 
 } // namespace Snow

src/snow/manager.h

@@ -13,5 +13,6 @@ public:
 
 private:
   std::vector<std::unique_ptr<Snow>> snows;
+  void Kill(uint pos);
 };
 } // namespace Snow

src/snow/snow.cpp

@@ -30,6 +30,8 @@ void Snow::Move() {
   position += move;
 }
 
+bool Snow::IsAlive() { return live; }
+
 void Snow::CheckLive() {
   if (position.y >= SCREEN_HEIGHT)
     live = false;

src/snow/snow.h

@@ -10,6 +10,7 @@ public:
 
   void Update();
   void Draw();
+  bool IsAlive();
 
   ~Snow();