Added option to toggle vsync

For the ultimate PC master race experience.

Also calling water scroll on every frame with deltatime instead of being called at fixed intervals, making it look smoother as framerate increases.

Subsurface/Source/GameSettings.cs

@@ -46,6 +46,8 @@ namespace Barotrauma
         public int GraphicsWidth    { get; set; }
         public int GraphicsHeight   { get; set; }
 
+        public bool VSyncEnabled { get; set; }
+
         //public bool FullScreenEnabled { get; set; }
 
         public WindowMode WindowMode
@@ -128,6 +130,7 @@ namespace Barotrauma
             XElement graphicsMode = doc.Root.Element("graphicsmode");
             GraphicsWidth = ToolBox.GetAttributeInt(graphicsMode, "width", 0);
             GraphicsHeight = ToolBox.GetAttributeInt(graphicsMode, "height", 0);
+            VSyncEnabled = ToolBox.GetAttributeBool(graphicsMode, "vsync", true);
 
             if (GraphicsWidth==0 || GraphicsHeight==0)
             {
@@ -255,6 +258,7 @@ namespace Barotrauma
                 gMode.ReplaceAttributes(
                     new XAttribute("width", GraphicsWidth),
                     new XAttribute("height", GraphicsHeight),
+                    new XAttribute("vsync", VSyncEnabled),
                     new XAttribute("displaymode", windowMode));
             }
 
@@ -362,6 +366,20 @@ namespace Barotrauma
 
             y += 70;
 
+            GUITickBox vsyncTickBox = new GUITickBox(new Rectangle(0, y, 20, 20), "Enable vertical sync",Alignment.CenterY | Alignment.Left,settingsFrame);
+            vsyncTickBox.OnSelected = (GUITickBox box) =>
+            {
+                VSyncEnabled = !VSyncEnabled;
+                GameMain.Graphics.SynchronizeWithVerticalRetrace = VSyncEnabled;
+                GameMain.Graphics.ApplyChanges();
+                UnsavedSettings = true;
+
+                return true;
+            };
+            vsyncTickBox.Selected = VSyncEnabled;
+
+            y += 70;
+
             new GUITextBlock(new Rectangle(0, y, 100, 20), "Sound volume:", GUI.Style, settingsFrame);
             GUIScrollBar soundScrollBar = new GUIScrollBar(new Rectangle(0, y+20, 150, 20), GUI.Style,0.1f, settingsFrame);
             soundScrollBar.BarScroll = SoundVolume;