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/CameraScrolling.cs | 96 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 V3/Camera/CameraScrolling.cs

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

diff --git a/V3/Camera/CameraScrolling.cs b/V3/Camera/CameraScrolling.cs
new file mode 100644
index 0000000..72e4911
--- /dev/null
+++ b/V3/Camera/CameraScrolling.cs
@@ -0,0 +1,96 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Input;
+using V3.Objects;
+using MathHelper = Microsoft.Xna.Framework.MathHelper;
+using Vector2 = Microsoft.Xna.Framework.Vector2;
+
+namespace V3.Camera
+{
+    /// <summary>
+    /// This is the camera class for a map-scrolling camera mode. Does not move over the map.
+    /// </summary>
+    // ReSharper disable once ClassNeverInstantiated.Global
+    public sealed class CameraScrolling : ICamera
+    {
+        public int MapPixelWidth { get; set; }
+        public int MapPixelHeight { get; set; }
+        private const int MinOffset = 10;
+        private const int CameraSpeed = 10;
+        private readonly GraphicsDeviceManager mGraphicsDeviceManager;
+        private Point mLocation;
+        public Matrix Transform { get; set; }
+        private int mMaxX;
+        private int mMaxY;
+        public Vector2 Location {get {return mLocation.ToVector2();} set { mLocation = value.ToPoint(); } }
+        public Point ScreenSize => new Point(mGraphicsDeviceManager.GraphicsDevice.Viewport.Width, mGraphicsDeviceManager.GraphicsDevice.Viewport.Height);
+        public Rectangle ScreenRectangle => new Rectangle(mLocation, ScreenSize);
+
+        public CameraScrolling(GraphicsDeviceManager graphicsDeviceManager)
+        {
+            mGraphicsDeviceManager = graphicsDeviceManager;
+        }
+
+        public void Update(ICreature player)
+        {
+            var viewport = mGraphicsDeviceManager.GraphicsDevice.Viewport;
+
+            mMaxX = MapPixelWidth - viewport.Width;
+            mMaxY = MapPixelHeight / 2 - viewport.Height;
+
+            var mouse = Mouse.GetState();
+            if (mouse.X < MinOffset)
+            {
+                MoveCameraLeft();
+            }
+
+            if (mouse.X > viewport.Width - MinOffset)
+            {
+                MoveCameraRight();
+            }
+
+            if (mouse.Y < MinOffset)
+            {
+                MoveCameraDown();
+            }
+
+            if (mouse.Y > viewport.Height - MinOffset)
+            {
+                MoveCameraUp();
+            }
+            Transform = Matrix.CreateTranslation(new Vector3(-mLocation.ToVector2(), 0));
+        }
+
+        /// <summary>
+        /// Move the Camera to the left. Does not go outside the map.
+        /// </summary>
+        private void MoveCameraLeft()
+        {
+            mLocation.X = MathHelper.Clamp(mLocation.X - CameraSpeed, 0, mMaxX);
+        }
+
+        /// <summary>
+        /// Move the Camera to the right. Does not go outside the map.
+        /// </summary>
+        private void MoveCameraRight()
+        {
+            mLocation.X = MathHelper.Clamp(mLocation.X + CameraSpeed, 0, mMaxX);
+        }
+
+        /// <summary>
+        /// Move the Camera up. Does not go outside the map.
+        /// </summary>
+        private void MoveCameraUp()
+        {
+            mLocation.Y = MathHelper.Clamp(mLocation.Y + CameraSpeed, 0, mMaxY);
+        }
+
+
+        /// <summary>
+        /// Move the Camera down. Does not go outside the map.
+        /// </summary>
+        private void MoveCameraDown()
+        {
+            mLocation.Y = MathHelper.Clamp(mLocation.Y - CameraSpeed, 0, mMaxY);
+        }
+    }
+}
\ No newline at end of file
-- 
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