Re-organize all projects (#4166)

Content.Client/HealthOverlay/UI/HealthOverlayBar.cs

@@ -0,0 +1,46 @@
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface;
+using Robust.Shared.IoC;
+using Robust.Shared.Maths;
+using Robust.Shared.Prototypes;
+
+namespace Content.Client.HealthOverlay.UI
+{
+    public class HealthOverlayBar : Control
+    {
+        public const byte HealthBarScale = 2;
+
+        private const int XPixelDiff = 20 * HealthBarScale;
+
+        public HealthOverlayBar()
+        {
+            IoCManager.InjectDependencies(this);
+            Shader = IoCManager.Resolve<IPrototypeManager>().Index<ShaderPrototype>("unshaded").Instance();
+        }
+
+        private ShaderInstance Shader { get; }
+
+        /// <summary>
+        ///     From -1 (dead) to 0 (crit) and 1 (alive)
+        /// </summary>
+        public float Ratio { get; set; }
+
+        public Color Color { get; set; }
+
+        protected override void Draw(DrawingHandleScreen handle)
+        {
+            base.Draw(handle);
+
+            handle.UseShader(Shader);
+
+            var leftOffset = 2 * HealthBarScale;
+            var box = new UIBox2i(
+                leftOffset,
+                -2 + 2 * HealthBarScale,
+                leftOffset + (int) (XPixelDiff * Ratio * UIScale),
+                -2);
+
+            handle.DrawRect(box, Color);
+        }
+    }
+}