reorganization, and skeleton of camera system.

RhythmBullet/Zer01HD/Utilities/Camera/Camera2D.cs

@@ -0,0 +1,25 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.Utilities.Camera
+{
+    class Camera2D
+    {
+        public float Zoom;
+        public Vector2 Position;
+        public Matrix Transform { get; private set; }
+        
+        public void Update(Viewport viewport)
+        {
+            Transform = 
+                Matrix.CreateTranslation(new Vector3(Position.X, Position.Y, 0)) * 
+                Matrix.CreateScale(Zoom) * 
+                Matrix.CreateTranslation(new Vector3(viewport.Width/2f, viewport.Height/2f, 0f));   
+        }
+    }
+}