entity system!

src/game/Level.h

@@ -0,0 +1,91 @@
+#pragma once
+#include "Global.h"
+#include "../engine/Shared.h"
+#include "Log.h"
+#include <bgfx/bgfx.h>
+
+namespace Game
+{
+
+	typedef uint16_t CubeHandle;
+	
+	struct Cube
+	{
+		int32_t TestX = 0;
+		int32_t TestY = 0;
+		Mat4 Transform;
+		uint16_t MaterialIdx = 0;
+		uint16_t ModelIdx = 0;
+
+		void Setup();
+		void Update();
+	};
+
+	template<typename T, uint32_t C>
+	class EntityManager
+	{
+	public:
+		uint16_t Count = 0;
+		T* Data = nullptr;
+		uint32_t EntitySize = 0;
+
+	public:
+		uint64_t Setup(void* ptr)
+		{
+			if (EntitySize != sizeof(T))
+			{
+				Count = 0;
+			}
+			EntitySize = sizeof(T);
+			Data = reinterpret_cast<T*>(ptr);
+			return C*sizeof(T);
+		}
+		
+		T* New()
+		{
+			if (Data == nullptr)
+			{
+				Log("Accessed EntityManager before setup!");
+				return nullptr;
+			}
+			if (Count >= C)
+			{
+				Log("Too many entities!");
+				return nullptr;
+			}
+			Data[Count] = {};
+			Data[Count].Setup();
+			T* result = &Data[Count];
+			++Count;
+			return result;
+		}
+
+		T* Get(uint16_t idx)
+		{
+			if (idx > Count)
+			{
+				Log("OOB Access!");
+				return nullptr;
+			}
+			return &Data[idx];
+		}
+		
+		void Update()
+		{
+			for (uint32_t i = 0; i < Count; ++i)
+			{
+				Data[i].Update();
+			}
+		}
+	};
+	
+	class Level
+	{
+	public:
+		EntityManager<Cube, 1024> Cubes;
+
+	public:
+		void Setup(GameData& data);
+		void Update();
+	};
+}