Pulled transform stuff into a system (starting to do ECS stuff)

1 files changed, 33 insertions, 0 deletions

@@ -0,0 +1,33 @@
+#ifndef TRANSFORM_SYSTEM_H_BA2633BC
+#define TRANSFORM_SYSTEM_H_BA2633BC
+
+#include <range/v3/all.hpp>
+#include <set>
+#include <tuple>
+#include "system.h"
+#include "vector.h"
+
+class Game;
+
+class TransformSystem : public System {
+public:
+
+  TransformSystem(Game& game) : game_(game) {}
+
+  void initSprite(int spriteId, vec2i loc);
+
+  void moveSprite(int spriteId, vec2i newLoc);
+
+  auto getSpritesByY() const {
+    return spritesByY_ | ranges::views::transform([] (const std::tuple<int, int>& val) {
+      return std::get<1>(val);
+    });
+  }
+
+private:
+
+  Game& game_;
+  std::set<std::tuple<int, int>> spritesByY_;
+};
+
+#endif /* end of include guard: TRANSFORM_SYSTEM_H_BA2633BC */