From ced3d03bdb3ce866d832e03fb212865140905a9a Mon Sep 17 00:00:00 2001
From: Thomas Leyh <leyh.thomas@web.de>
Date: Sun, 24 Jul 2016 08:14:18 +0200
Subject: Add project files.

---
 V3/Camera/CameraCentered.cs | 57 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 V3/Camera/CameraCentered.cs

(limited to 'V3/Camera/CameraCentered.cs')

diff --git a/V3/Camera/CameraCentered.cs b/V3/Camera/CameraCentered.cs
new file mode 100644
index 0000000..cd04209
--- /dev/null
+++ b/V3/Camera/CameraCentered.cs
@@ -0,0 +1,57 @@
+using Microsoft.Xna.Framework;
+using V3.Objects;
+
+namespace V3.Camera
+{
+    /// <summary>
+    /// This is the Camera Class for a player-centered camera mode. Does not go outside the map.
+    /// </summary>
+    // ReSharper disable once ClassNeverInstantiated.Global
+    public sealed class CameraCentered : ICamera
+    {
+        public int MapPixelWidth { get; set; }
+        public int MapPixelHeight { get; set; }
+        private int mMaxX;
+        private int mMaxY;
+        public Matrix Transform { get; set; }
+        private Point mCamCenter;
+        public Vector2 Location { get { return mCamCenter.ToVector2(); } set { mCamCenter = value.ToPoint(); } }
+        public Point ScreenSize => new Point(mGraphicsDeviceManager.GraphicsDevice.Viewport.Width, mGraphicsDeviceManager.GraphicsDevice.Viewport.Height);
+        public Rectangle ScreenRectangle => new Rectangle(mCamCenter, ScreenSize);
+
+        private readonly GraphicsDeviceManager mGraphicsDeviceManager;
+
+        public CameraCentered(GraphicsDeviceManager graphicsDeviceManager)
+        {
+            mGraphicsDeviceManager = graphicsDeviceManager;
+        }
+
+        private int ScreenWidth()
+        {
+            return mGraphicsDeviceManager.GraphicsDevice.Viewport.Width; 
+        }
+
+        private int ScreenHeight()
+        {
+            return mGraphicsDeviceManager.GraphicsDevice.Viewport.Height;
+        }
+
+        /// <summary>
+        /// Updates the position of the camera related to the player's position.
+        /// </summary>
+        public void Update(ICreature player)
+        {
+            /*The center of the camera is by default in the upper left corner. To get the player in center, 
+            simply substract the half of the screen values. Does not go outside the map.
+            */
+            mMaxX = MapPixelWidth - ScreenWidth();
+            mMaxY = MapPixelHeight / 2 - ScreenHeight();
+
+            mCamCenter = new Point(MathHelper.Clamp((int)(player.Position.X - ScreenWidth() * 0.5f), 0, mMaxX),
+                                     MathHelper.Clamp((int)(player.Position.Y - ScreenHeight() * 0.5f), 0, mMaxY));
+
+            //Transform matrix for the camera to make sure it is moving.
+            Transform = Matrix.CreateTranslation(new Vector3(-mCamCenter.ToVector2(), 0));
+        }
+    }
+}
\ No newline at end of file
-- 
cgit v1.2.1