Re-organize all projects (#4166)

Content.Client/CombatMode/ColoredScreenBorderOverlay.cs

@@ -0,0 +1,32 @@
+#nullable enable
+using Robust.Client.Graphics;
+using Robust.Shared.Enums;
+using Robust.Shared.IoC;
+using Robust.Shared.Maths;
+using Robust.Shared.Prototypes;
+
+namespace Content.Client.CombatMode
+{
+    public class ColoredScreenBorderOverlay : Overlay
+    {
+        [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+        [Dependency] private readonly IEyeManager _eyeManager = default!;
+
+        public override OverlaySpace Space => OverlaySpace.WorldSpace;
+        private readonly ShaderInstance _shader;
+
+        public ColoredScreenBorderOverlay()
+        {
+            IoCManager.InjectDependencies(this);
+            _shader = _prototypeManager.Index<ShaderPrototype>("ColoredScreenBorder").Instance();
+        }
+
+        protected override void Draw(in OverlayDrawArgs args)
+        {
+            var worldHandle = args.WorldHandle;
+            worldHandle.UseShader(_shader);
+            var viewport = _eyeManager.GetWorldViewport();
+            worldHandle.DrawRect(viewport, Color.White);
+        }
+    }
+}