Eye damage (#10262)

Content.Client/Eye/Blinding/BlurryVisionOverlay.cs

@@ -0,0 +1,68 @@
+using Robust.Client.Graphics;
+using Robust.Client.Player;
+using Robust.Shared.Enums;
+using Robust.Shared.Prototypes;
+using Content.Shared.Eye.Blinding;
+
+namespace Content.Client.Eye.Blinding
+{
+    public sealed class BlurryVisionOverlay : Overlay
+    {
+        [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+        [Dependency] private readonly IEntityManager _entityManager = default!;
+        [Dependency] private readonly IPlayerManager _playerManager = default!;
+
+        public override bool RequestScreenTexture => true;
+        public override OverlaySpace Space => OverlaySpace.WorldSpace;
+        private readonly ShaderInstance _blurryVisionXShader;
+        private readonly ShaderInstance _blurryVisionYShader;
+        private BlurryVisionComponent _blurryVisionComponent = default!;
+
+        public BlurryVisionOverlay()
+        {
+            IoCManager.InjectDependencies(this);
+            _blurryVisionXShader = _prototypeManager.Index<ShaderPrototype>("BlurryVisionX").InstanceUnique();
+            _blurryVisionYShader = _prototypeManager.Index<ShaderPrototype>("BlurryVisionY").InstanceUnique();
+        }
+
+        protected override bool BeforeDraw(in OverlayDrawArgs args)
+        {
+            var playerEntity = _playerManager.LocalPlayer?.ControlledEntity;
+
+            if (playerEntity == null)
+                return false;
+
+            if (!_entityManager.TryGetComponent<BlurryVisionComponent>(playerEntity, out var blurComp))
+                return false;
+
+            if (!blurComp.Active)
+                return false;
+
+            if (_entityManager.TryGetComponent<BlindableComponent>(playerEntity, out var blindComp)
+                && blindComp.Sources > 0)
+                return false;
+
+            _blurryVisionComponent = blurComp;
+            return true;
+        }
+
+        protected override void Draw(in OverlayDrawArgs args)
+        {
+            if (ScreenTexture == null)
+                return;
+
+            _blurryVisionXShader?.SetParameter("SCREEN_TEXTURE", ScreenTexture);
+            _blurryVisionXShader?.SetParameter("BLUR_AMOUNT", (_blurryVisionComponent.Magnitude / 10));
+            _blurryVisionYShader?.SetParameter("SCREEN_TEXTURE", ScreenTexture);
+            _blurryVisionYShader?.SetParameter("BLUR_AMOUNT", (_blurryVisionComponent.Magnitude / 10));
+
+            var worldHandle = args.WorldHandle;
+            var viewport = args.WorldBounds;
+            worldHandle.SetTransform(Matrix3.Identity);
+            worldHandle.UseShader(_blurryVisionXShader);
+            worldHandle.DrawRect(viewport, Color.White);
+            worldHandle.UseShader(_blurryVisionYShader);
+            worldHandle.DrawRect(viewport, Color.White);
+        }
+    }
+}

Content.Client/Eye/Blinding/BlurryVisionSystem.cs

@@ -0,0 +1,61 @@
+using Content.Shared.Eye.Blinding;
+using Robust.Client.GameObjects;
+using Robust.Client.Graphics;
+using Robust.Client.Player;
+using Robust.Shared.GameStates;
+
+namespace Content.Client.Eye.Blinding;
+
+public sealed class BlurryVisionSystem : EntitySystem
+{
+    [Dependency] private readonly IPlayerManager _player = default!;
+    [Dependency] private readonly IOverlayManager _overlayMan = default!;
+    private BlurryVisionOverlay _overlay = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<BlurryVisionComponent, ComponentInit>(OnBlurryInit);
+        SubscribeLocalEvent<BlurryVisionComponent, ComponentShutdown>(OnBlurryShutdown);
+
+        SubscribeLocalEvent<BlurryVisionComponent, PlayerAttachedEvent>(OnPlayerAttached);
+        SubscribeLocalEvent<BlurryVisionComponent, PlayerDetachedEvent>(OnPlayerDetached);
+
+        SubscribeLocalEvent<BlurryVisionComponent, ComponentHandleState>(OnHandleState);
+
+        _overlay = new();
+    }
+
+    private void OnPlayerAttached(EntityUid uid, BlurryVisionComponent component, PlayerAttachedEvent args)
+    {
+        _overlayMan.AddOverlay(_overlay);
+    }
+
+    private void OnPlayerDetached(EntityUid uid, BlurryVisionComponent component, PlayerDetachedEvent args)
+    {
+        _overlayMan.RemoveOverlay(_overlay);
+    }
+
+    private void OnBlurryInit(EntityUid uid, BlurryVisionComponent component, ComponentInit args)
+    {
+        if (_player.LocalPlayer?.ControlledEntity == uid)
+            _overlayMan.AddOverlay(_overlay);
+    }
+
+    private void OnBlurryShutdown(EntityUid uid, BlurryVisionComponent component, ComponentShutdown args)
+    {
+        if (_player.LocalPlayer?.ControlledEntity == uid)
+        {
+            _overlayMan.RemoveOverlay(_overlay);
+        }
+    }
+
+    private void OnHandleState(EntityUid uid, BlurryVisionComponent component, ref ComponentHandleState args)
+    {
+        if (args.Current is not BlurryVisionComponentState state)
+            return;
+
+        component.Magnitude = state.Magnitude;
+    }
+}