From 8ffb27ab09ff567a159e5be5a243fd3967084977 Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Sun, 3 Feb 2019 16:10:44 -0500
Subject: Very basic ECS

---
 src/simulation.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 src/simulation.h

(limited to 'src/simulation.h')

diff --git a/src/simulation.h b/src/simulation.h
new file mode 100644
index 0000000..bc47642
--- /dev/null
+++ b/src/simulation.h
@@ -0,0 +1,57 @@
+#ifndef SIMULATION_H_7BF6EEA4
+#define SIMULATION_H_7BF6EEA4
+
+#include "entity.h"
+#include "renderer.h"
+#include <vector>
+#include <deque>
+#include <set>
+
+class Level;
+
+class Simulation {
+public:
+
+  using id_type = std::vector<Entity>::size_type;
+
+  // Constructor
+  explicit Simulation(const Level& level) : level_(level) {}
+
+  void tick(
+    double dt,
+    const Uint8* keystate);
+
+  id_type emplaceEntity();
+
+  void deleteEntity(id_type id);
+
+  Entity& getEntity(id_type id)
+  {
+    return entities_.at(id);
+  }
+
+  const Entity& getEntity(id_type id) const
+  {
+    return entities_.at(id);
+  }
+
+  const std::set<id_type>& getActive() const
+  {
+    return active_;
+  }
+
+  const Level& getLevel() const
+  {
+    return level_;
+  }
+
+private:
+
+  const Level& level_;
+
+  std::vector<Entity> entities_;
+  std::deque<id_type> available_;
+  std::set<id_type> active_;
+};
+
+#endif /* end of include guard: SIMULATION_H_7BF6EEA4 */
-- 
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