1 files changed, 20 insertions, 7 deletions

@@ -1,6 +1,8 @@
 #ifndef GAME_H_E6F1396E
 #define GAME_H_E6F1396E
 
+#include <set>
+#include <range/v3/all.hpp>
 #include <vector>
 #include "sprite.h"
 
@@ -14,23 +16,34 @@ struct Input {
 class Game {
 public:
 
-  int addSprite(Sprite sprite) {
-    int id = sprites_.size();
-    sprites_.push_back(std::move(sprite));
-    return id;
-  }
+  int addSprite(Sprite sprite);
 
-  Sprite& getSprite(int id) {
+  const Sprite& getSprite(int id) const {
     return sprites_.at(id);
   }
 
-  std::vector<Sprite>& getSprites() {
+  const std::vector<Sprite>& getSprites() {
     return sprites_;
   }
 
+  auto spriteView() const {
+    return ranges::views::transform([&] (int id) -> const Sprite& {
+      return sprites_.at(id);
+    });
+  }
+
+  auto getSpritesByY() const {
+    return spritesByY_ | ranges::views::transform([] (const std::tuple<int, int>& val) {
+      return std::get<1>(val);
+    });
+  }
+
+  void moveSprite(int id, vec2i newLoc);
+
 private:
 
   std::vector<Sprite> sprites_;
+  std::set<std::tuple<int, int>> spritesByY_;
 };
 
 #endif /* end of include guard: GAME_H_E6F1396E */