Added 3d camera and created 2d camera from it.

RecrownedAthenaeum/Camera/Camera.cs

@@ -0,0 +1,91 @@
+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 RecrownedAthenaeum.Camera
+{
+    /// <summary>
+    /// A generic 3D camera.
+    /// </summary>
+    public class Camera
+    {
+        /// <summary>
+        /// Current position in the world.
+        /// </summary>
+        public Vector3 position;
+
+        /// <summary>
+        /// The place the 3D camera is looking at.
+        /// </summary>
+        public Vector3 lookAt;
+
+        /// <summary>
+        /// The direction up is for the 3D camera.
+        /// </summary>
+        public Vector3 upDirection;
+
+        /// <summary>
+        /// The transform matrix representing the world (rotation and translations of the original world).
+        /// </summary>
+        public Matrix worldMatrix;
+
+        /// <summary>
+        /// The view matrix that describes where the camera looks.
+        /// </summary>
+        public Matrix ViewMatrix { get; private set; }
+
+        /// <summary>
+        /// The projection matrix.
+        /// </summary>
+        public Matrix projectionMatrix;
+
+        /// <summary>
+        /// The final transformation matrix.
+        /// </summary>
+        public Matrix TransformationMatrix { get; private set; }
+
+        /// <summary>
+        /// The graphics device used 
+        /// </summary>
+        protected GraphicsDevice graphicsDevice;
+
+        /// <summary>
+        /// Constructs 3D camera with an orthographic projection matrix with dimensions of graphics devices viewport. All changes to matrices should have apply called after changes.
+        /// </summary>
+        /// <param name="graphicsDevice">The graphics device to use. Will use graphics device from <see cref="Configuration"/>'s graphics device manager if this is null which it is by default.</param>
+        public Camera(GraphicsDevice graphicsDevice = null)
+        {
+            this.graphicsDevice = graphicsDevice ?? (Configuration.GraphicsDeviceManager.GraphicsDevice);
+
+            position.Z = 0;
+            worldMatrix = Matrix.Identity;
+            lookAt = Vector3.Forward;
+            upDirection = Vector3.Up;
+            Center();
+            projectionMatrix = Matrix.CreateOrthographic(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height, 0, 1);
+            Apply();
+        }
+
+        /// <summary>
+        /// Applies the changes to the fields and properties of the camera.
+        /// </summary>
+        public virtual void Apply()
+        {
+            ViewMatrix = Matrix.CreateLookAt(position, lookAt, upDirection);
+            TransformationMatrix = worldMatrix * ViewMatrix * projectionMatrix;
+        }
+
+        /// <summary>
+        /// Centers the camera to middle of width and height of game window.
+        /// </summary>
+        public void Center()
+        {
+            position.X = this.graphicsDevice.Viewport.Width * 0.5f;
+            position.Y = this.graphicsDevice.Viewport.Height * 0.5f;
+        }
+    }
+}

RecrownedAthenaeum/Camera/Camera2D.cs

@@ -5,50 +5,22 @@ using System;
 namespace RecrownedAthenaeum.Camera
 {
     /// <summary>
-    /// A virtual 2D camera.
+    /// A virtual 2D camera that wraps the normal <see cref="Camera"/>. Default projection is orthographic.
     /// </summary>
-    public class Camera2D
+    public class Camera2D : Camera
     {
-        /// <summary>
-        /// Current zoom level.
-        /// </summary>
-        public float Zoom;
 
         /// <summary>
-        /// Current position in the world.
+        /// The 2D position.
         /// </summary>
-        public Vector2 Position;
+        public Vector2 Position { get { return new Vector2(position.X, position.Y); } set { position.X = value.X; position.Y = value.Y; } }
 
         /// <summary>
-        /// The matrix representing the zoom and position.
+        /// A 2D camera from the generic <see cref="Camera"/>.
         /// </summary>
-        public Matrix Matrix { get; private set; }
+        public Camera2D() : base()
-
-        private GraphicsDevice graphicsDevice;
-
-        /// <summary>
-        /// Constructs 2D camera.
-        /// </summary>
-        /// <param name="graphicsDevice">The graphics device to use. Will use graphics device from <see cref="Configuration"/>'s graphics device manager if this is null which it is by default.</param>
-        public Camera2D(GraphicsDevice graphicsDevice = null)
         {
-            this.graphicsDevice = graphicsDevice ?? (Configuration.GraphicsDeviceManager.GraphicsDevice);
 
-            Zoom = 1f;
-            Position.X = this.graphicsDevice.Viewport.Width * 0.5f;
-            Position.Y = this.graphicsDevice.Viewport.Height * 0.5f;
-        }
-
-        /// <summary>
-        /// Applies any changes made to the properties of this camera and updates to new dimensions of viewport specified by the graphics device.
-        /// </summary>
-        public void Update()
-        {
-            Rectangle bounds = graphicsDevice.Viewport.Bounds;
-            Matrix = 
-                Matrix.CreateTranslation(new Vector3(-Position.X, -Position.Y, 0)) * 
-                Matrix.CreateScale(Zoom) * 
-                Matrix.CreateTranslation(new Vector3(bounds.Width * 0.5f, bounds.Height * 0.5f, 0f));
         }
 
         /// <summary>
@@ -65,6 +37,13 @@ namespace RecrownedAthenaeum.Camera
             distance *= (float)(1.0f - Math.Pow(1 - alpha, delta / 0.02f));
 
             Position += distance;
+
+            Apply();
+        }
+
+        private Matrix BasicOrthographic()
+        {
+            return Matrix.CreateOrthographic(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height, 0, 1);
         }
     }
 }