Adds config options for diagonal movement (#684)

* Adds config options for diagonal movement

* Addresses comment

Content.Server/GameObjects/Components/Movement/PlayerInputMoverComponent.cs

@@ -1,4 +1,5 @@
-using Content.Server.Interfaces.GameObjects.Components.Movement;
+
+using Content.Server.Interfaces.GameObjects.Components.Movement;
 using Robust.Server.GameObjects;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Components;
@@ -8,6 +9,9 @@ using Robust.Shared.Maths;
 using Robust.Shared.Physics;
 using Robust.Shared.Serialization;
 using Robust.Shared.ViewVariables;
+using Robust.Shared.IoC;
+using Robust.Shared.Interfaces.Configuration;
+using Robust.Shared.Configuration;
 
 namespace Content.Server.GameObjects.Components.Movement
 {
@@ -18,6 +22,11 @@ namespace Content.Server.GameObjects.Components.Movement
     [ComponentReference(typeof(IMoverComponent))]
     public class PlayerInputMoverComponent : Component, IMoverComponent, ICollideSpecial
     {
+
+#pragma warning disable 649
+        [Dependency] private readonly IConfigurationManager _configurationManager;
+#pragma warning restore 649
+
         private bool _movingUp;
         private bool _movingDown;
         private bool _movingLeft;
@@ -54,6 +63,17 @@ namespace Content.Server.GameObjects.Components.Movement
 
         public float StepSoundDistance { get; set; }
 
+        /// <summary>
+        ///     Whether or not the player can move diagonally.
+        /// </summary>
+        [ViewVariables] public bool DiagonalMovementEnabled => _configurationManager.GetCVar<bool>("game.diagonalmovement");
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            _configurationManager.RegisterCVar("game.diagonalmovement", true, CVar.ARCHIVE);
+        }
+
         /// <inheritdoc />
         public override void OnAdd()
         {
@@ -110,8 +130,11 @@ namespace Content.Server.GameObjects.Components.Movement
             x += _movingRight ? 1 : 0;
 
             var y = 0;
+            if (DiagonalMovementEnabled || x == 0)
+            {
                 y -= _movingDown ? 1 : 0;
                 y += _movingUp ? 1 : 0;
+            }
 
             VelocityDir = new Vector2(x, y);