Misc stealth and box changes (#11809)

* git mv

* Disable shader while box is open

* Hide entity menu / prevent examine

* fix recursion fix recursion fix recursion fix recursion

* Better visibility checks

* min and max visibility fields

* fix reference point

Content.Client/ContextMenu/UI/EntityMenuPresenter.cs

@@ -7,6 +7,7 @@ using Content.Client.Verbs;
 using Content.Client.Viewport;
 using Content.Shared.CCVar;
 using Content.Shared.CombatMode;
+using Content.Shared.Examine;
 using Content.Shared.Input;
 using Robust.Client.GameObjects;
 using Robust.Client.Graphics;
@@ -20,6 +21,7 @@ using Robust.Shared.Input;
 using Robust.Shared.Input.Binding;
 using Robust.Shared.IoC;
 using Robust.Shared.Log;
+using Robust.Shared.Map;
 using Robust.Shared.Maths;
 using Robust.Shared.Timing;
 
@@ -47,6 +49,7 @@ namespace Content.Client.ContextMenu.UI
 
         private readonly VerbSystem _verbSystem;
         private readonly ExamineSystem _examineSystem;
+        private readonly TransformSystem _xform;
         private readonly SharedCombatModeSystem _combatMode;
 
         /// <summary>
@@ -64,6 +67,7 @@ namespace Content.Client.ContextMenu.UI
             _verbSystem = verbSystem;
             _examineSystem = _entityManager.EntitySysManager.GetEntitySystem<ExamineSystem>();
             _combatMode = _entityManager.EntitySysManager.GetEntitySystem<CombatModeSystem>();
+            _xform = _entityManager.EntitySysManager.GetEntitySystem<TransformSystem>();
 
             _cfg.OnValueChanged(CCVars.EntityMenuGroupingType, OnGroupingChanged, true);
 
@@ -191,9 +195,24 @@ namespace Content.Client.ContextMenu.UI
             var ignoreFov = !_eyeManager.CurrentEye.DrawFov ||
                 (_verbSystem.Visibility & MenuVisibility.NoFov) == MenuVisibility.NoFov;
 
+            _entityManager.TryGetComponent(player, out ExaminerComponent? examiner);
+            var xformQuery = _entityManager.GetEntityQuery<TransformComponent>();
+
             foreach (var entity in Elements.Keys.ToList())
             {
-                if (_entityManager.Deleted(entity) || !ignoreFov && !_examineSystem.CanExamine(player, entity))
+                if (!xformQuery.TryGetComponent(entity, out var xform))
+                {
+                    // entity was deleted
+                    RemoveEntity(entity);
+                    continue;
+                }
+
+                if (ignoreFov)
+                    continue;
+
+                var pos = new MapCoordinates(_xform.GetWorldPosition(xform, xformQuery), xform.MapID);
+
+                if (!_examineSystem.CanExamine(player, pos, e => e == player || e == entity, entity, examiner))
                     RemoveEntity(entity);
             }
         }

Content.Client/Examine/ExamineSystem.cs

@@ -63,13 +63,23 @@ namespace Content.Client.Examine
             base.Shutdown();
         }
 
-        public override bool CanExamine(EntityUid examiner, MapCoordinates target, Ignored? predicate = null)
+        public override bool CanExamine(EntityUid examiner, MapCoordinates target, Ignored? predicate = null, EntityUid? examined = null, ExaminerComponent? examinerComp = null)
         {
-            var b = _eyeManager.GetWorldViewbounds();
-            if (!b.Contains(target.Position))
+            if (!Resolve(examiner, ref examinerComp, false))
                 return false;
 
-            return base.CanExamine(examiner, target, predicate);
+            if (examinerComp.SkipChecks)
+                return true;
+
+            if (examinerComp.CheckInRangeUnOccluded)
+            {
+                // TODO fix this. This should be using the examiner's eye component, not eye manager.
+                var b = _eyeManager.GetWorldViewbounds();
+                if (!b.Contains(target.Position))
+                    return false;
+            }
+
+            return base.CanExamine(examiner, target, predicate, examined, examinerComp);
         }
 
         private bool HandleExamine(in PointerInputCmdHandler.PointerInputCmdArgs args)

Content.Client/Stealth/StealthSystem.cs

@@ -22,35 +22,48 @@ public sealed class StealthSystem : SharedStealthSystem
         SubscribeLocalEvent<StealthComponent, BeforePostShaderRenderEvent>(OnShaderRender);
     }
 
-    protected override void OnInit(EntityUid uid, StealthComponent component, ComponentInit args)
+    public override void SetEnabled(EntityUid uid, bool value, StealthComponent? component = null)
     {
-        base.OnInit(uid, component, args);
-        if (!TryComp(uid, out SpriteComponent? sprite))
+        if (!Resolve(uid, ref component) || component.Enabled == value)
             return;
 
-        sprite.PostShader = _shader;
-        sprite.GetScreenTexture = true;
-        sprite.RaiseShaderEvent = true;
+        base.SetEnabled(uid, value, component);
+        SetShader(uid, value, component);
+    }
+
+    private void SetShader(EntityUid uid, bool enabled, StealthComponent? component = null, SpriteComponent? sprite = null)
+    {
+        if (!Resolve(uid, ref component, ref sprite, false))
+            return;
+
+        sprite.Color = Color.White;
+        sprite.PostShader = enabled ? _shader : null;
+        sprite.GetScreenTexture = enabled;
+        sprite.RaiseShaderEvent = enabled;
+
+        if (!enabled)
+        {
+            if (component.HadOutline)
+                AddComp<InteractionOutlineComponent>(uid);
+            return;
+        }
 
         if (TryComp(uid, out InteractionOutlineComponent? outline))
         {
-            RemComp(uid, outline);
+            RemCompDeferred(uid, outline);
             component.HadOutline = true;
         }
     }
 
+    protected override void OnInit(EntityUid uid, StealthComponent component, ComponentInit args)
+    {
+        base.OnInit(uid, component, args);
+        SetShader(uid, component.Enabled, component);
+    }
+
     private void OnRemove(EntityUid uid, StealthComponent component, ComponentRemove args)
     {
-        if (!TryComp(uid, out SpriteComponent? sprite))
-            return;
-
-        sprite.PostShader = null;
-        sprite.GetScreenTexture = false;
-        sprite.RaiseShaderEvent = false;
-        sprite.Color = Color.White;
-
-        if (component.HadOutline)
-            AddComp<InteractionOutlineComponent>(uid);
+        SetShader(uid, false, component);
     }
 
     private void OnShaderRender(EntityUid uid, StealthComponent component, BeforePostShaderRenderEvent args)
@@ -61,9 +74,17 @@ public sealed class StealthSystem : SharedStealthSystem
         // So we need to use relative screen coordinates. The reference frame we use is the parent's position on screen.
         // this ensures that if the Stealth is not moving relative to the parent, its relative screen position remains
         // unchanged.
-        var parentXform = Transform(Transform(uid).ParentUid);
+        var parent = Transform(uid).ParentUid;
+        if (!parent.IsValid())
+            return; // should never happen, but lets not kill the client.
+        var parentXform = Transform(parent);
         var reference = args.Viewport.WorldToLocal(parentXform.WorldPosition);
+        reference.X = -reference.X;
         var visibility = GetVisibility(uid, component);
+
+        // actual visual visibility effect is limited to +/- 1.
+        visibility = Math.Clamp(visibility, -1f, 1f);
+
         _shader.SetParameter("reference", reference);
         _shader.SetParameter("visibility", visibility);
 

Content.Client/Verbs/VerbSystem.cs

@@ -108,18 +108,34 @@ namespace Content.Client.Verbs
                 ? Visibility
                 : Visibility | MenuVisibility.NoFov;
 
+
+            // Get entities
+            List<EntityUid> entities;
+
             // Do we have to do FoV checks?
             if ((visibility & MenuVisibility.NoFov) == 0)
             {
                 var entitiesUnderMouse = gameScreenBase.GetEntitiesUnderPosition(targetPos);
                 bool Predicate(EntityUid e) => e == player || entitiesUnderMouse.Contains(e);
+
+                // first check the general location.
                 if (!_examineSystem.CanExamine(player.Value, targetPos, Predicate))
                     return false;
-            }
 
-            // Get entities
-            var entities = _entityLookup.GetEntitiesInRange(targetPos, EntityMenuLookupSize)
-                .ToList();
+                TryComp(player.Value, out ExaminerComponent? examiner);
+
+                // Then check every entity
+                entities = new();
+                foreach (var ent in _entityLookup.GetEntitiesInRange(targetPos, EntityMenuLookupSize))
+                {
+                    if (_examineSystem.CanExamine(player.Value, targetPos, Predicate, ent, examiner))
+                        entities.Add(ent);
+                }
+            }
+            else
+            {
+                entities = _entityLookup.GetEntitiesInRange(targetPos, EntityMenuLookupSize).ToList();
+            }
 
             if (entities.Count == 0)
                 return false;

Content.Server/CardboardBox/CardboardBoxSystem.cs

@@ -1,4 +1,4 @@
-using System.Linq;
+using System.Linq;
 using Content.Shared.CardboardBox.Components;
 using Content.Server.Storage.Components;
 using Content.Shared.CardboardBox;
@@ -6,6 +6,8 @@ using Content.Shared.Movement.Components;
 using Content.Shared.Movement.Systems;
 using Robust.Shared.Player;
 using Robust.Shared.Timing;
+using Content.Shared.Stealth.Components;
+using Content.Shared.Stealth;
 
 namespace Content.Server.CardboardBox;
 
@@ -14,12 +16,14 @@ public sealed class CardboardBoxSystem : SharedCardboardBoxSystem
     [Dependency] private readonly SharedAudioSystem _audio = default!;
     [Dependency] private readonly SharedMoverController _mover = default!;
     [Dependency] private readonly IGameTiming _timing = default!;
+    [Dependency] private readonly SharedStealthSystem _stealth = default!;
 
     public override void Initialize()
     {
         base.Initialize();
         SubscribeLocalEvent<CardboardBoxComponent, StorageBeforeCloseEvent>(OnBeforeStorageClosed);
         SubscribeLocalEvent<CardboardBoxComponent, StorageAfterOpenEvent>(AfterStorageOpen);
+        SubscribeLocalEvent<CardboardBoxComponent, StorageAfterCloseEvent>(AfterStorageClosed);
     }
 
     private void OnBeforeStorageClosed(EntityUid uid, CardboardBoxComponent component, StorageBeforeCloseEvent args)
@@ -57,5 +61,18 @@ public sealed class CardboardBoxSystem : SharedCardboardBoxSystem
         }
 
         component.Mover = null;
+
+        // If this box has a stealth/chameleon effect, disable the stealth effect while the box is open.
+        _stealth.SetEnabled(uid, false);
+    }
+
+    private void AfterStorageClosed(EntityUid uid, CardboardBoxComponent component, StorageAfterCloseEvent args)
+    {
+        // If this box has a stealth/chameleon effect, enable the stealth effect.
+        if (TryComp(uid, out StealthComponent? stealth))
+        {
+            _stealth.SetVisibility(uid, stealth.MaxVisibility, stealth);
+            _stealth.SetEnabled(uid, true, stealth);
+        }
     }
 }

Content.Shared/Examine/ExamineSystemShared.cs

@@ -67,16 +67,28 @@ namespace Content.Shared.Examine
         public bool CanExamine(EntityUid examiner, EntityUid examined)
         {
             return !Deleted(examined) && CanExamine(examiner, EntityManager.GetComponent<TransformComponent>(examined).MapPosition,
-                entity => entity == examiner || entity == examined);
+                entity => entity == examiner || entity == examined, examined);
         }
 
         [Pure]
-        public virtual bool CanExamine(EntityUid examiner, MapCoordinates target, Ignored? predicate = null)
+        public virtual bool CanExamine(EntityUid examiner, MapCoordinates target, Ignored? predicate = null, EntityUid? examined = null, ExaminerComponent? examinerComp = null)
         {
-            if (!EntityManager.TryGetComponent(examiner, out ExaminerComponent? examinerComponent))
+            if (!Resolve(examiner, ref examinerComp, false))
                 return false;
 
-            if (!examinerComponent.DoRangeCheck)
+            // Ghosts and admins skip examine checks.
+            if (examinerComp.SkipChecks)
+                return true;
+
+            if (examined != null)
+            {
+                var ev = new ExamineAttemptEvent(examiner);
+                RaiseLocalEvent(examined.Value, ev);
+                if (ev.Cancelled)
+                    return false;
+            }
+
+            if (!examinerComp.CheckInRangeUnOccluded)
                 return true;
 
             if (EntityManager.GetComponent<TransformComponent>(examiner).MapID != target.MapId)
@@ -326,4 +338,17 @@ namespace Content.Shared.Examine
             PushMessage(msg);
         }
     }
+
+    /// <summary>
+    ///     Event raised directed at an entity that someone is attempting to examine
+    /// </summary>
+    public sealed class ExamineAttemptEvent : CancellableEntityEventArgs
+    {
+        public readonly EntityUid Examiner;
+
+        public ExamineAttemptEvent(EntityUid examiner)
+        {
+            Examiner = examiner;
+        }
+    }
 }

Content.Shared/Examine/ExaminerComponent.cs

@@ -7,13 +7,11 @@ namespace Content.Shared.Examine
     public sealed class ExaminerComponent : Component
     {
         [ViewVariables(VVAccess.ReadWrite)]
-        [DataField("DoRangeCheck")]
-        private bool _doRangeCheck = true;
+        [DataField("skipChecks")]
+        public bool SkipChecks = false;
 
-        /// <summary>
-        ///     Whether to do a distance check on examine.
-        ///     If false, the user can theoretically examine from infinitely far away.
-        /// </summary>
-        public bool DoRangeCheck => _doRangeCheck;
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("checkInRangeUnOccluded")]
+        public bool CheckInRangeUnOccluded = true;
     }
 }

Content.Shared/Stealth/Components/StealthComponent.cs

@@ -12,6 +12,12 @@ namespace Content.Shared.Stealth.Components;
 [Access(typeof(SharedStealthSystem))]
 public sealed class StealthComponent : Component
 {
+    /// <summary>
+    /// Whether or not the stealth effect should currently be applied.
+    /// </summary>
+    [DataField("enabled")]
+    public bool Enabled = true;
+
     /// <summary>
     /// Whether or not the entity previously had an interaction outline prior to cloaking.
     /// </summary>
@@ -19,12 +25,21 @@ public sealed class StealthComponent : Component
     public bool HadOutline;
 
     /// <summary>
-    /// Last set level of visibility. Ranges from 1 (fully visible) and -1 (fully hidden). To get the actual current
-    /// visibility, use <see cref="SharedStealthSystem.GetVisibility(EntityUid, StealthComponent?)"/>
+    /// Minimum visibility before the entity becomes unexaminable (and thus no longer appears on context menus).
+    /// </summary>
+    [DataField("examineThreshold")]
+    public readonly float ExamineThreshold = 0.5f;
+
+    /// <summary>
+    /// Last set level of visibility. The visual effect ranges from 1 (fully visible) and -1 (fully hidden). Values
+    /// outside of this range simply act as a buffer for the visual effect (i.e., a delay before turning invisible). To
+    /// get the actual current visibility, use <see cref="SharedStealthSystem.GetVisibility(EntityUid,
+    /// StealthComponent?)"/>
     /// </summary>
     [DataField("lastVisibility")]
     [Access(typeof(SharedStealthSystem),  Other = AccessPermissions.None)]
-    public float LastVisibility;
+    public float LastVisibility = 1;
+
 
     /// <summary>
     /// Time at which <see cref="LastVisibility"/> was set. Null implies the entity is currently paused and not
@@ -44,17 +59,31 @@ public sealed class StealthComponent : Component
     /// </summary>
     [DataField("movementVisibilityRate")]
     public readonly float MovementVisibilityRate = 0.2f;
+
+    /// <summary>
+    /// Minimum visibility. Note that the visual effect caps out at -1, but this value is allowed to be larger or smaller.
+    /// </summary>
+    [DataField("minVisibility")]
+    public readonly float MinVisibility = -1f;
+
+    /// <summary>
+    /// Maximum visibility. Note that the visual effect caps out at +1, but this value is allowed to be larger or smaller.
+    /// </summary>
+    [DataField("maxVisibility")]
+    public readonly float MaxVisibility = 1.5f;
 }
 
 [Serializable, NetSerializable]
 public sealed class StealthComponentState : ComponentState
 {
-    public float Visibility;
-    public TimeSpan? LastUpdated;
+    public readonly float Visibility;
+    public readonly TimeSpan? LastUpdated;
+    public readonly bool Enabled;
 
-    public StealthComponentState(float stealthLevel, TimeSpan? lastUpdated)
+    public StealthComponentState(float stealthLevel, TimeSpan? lastUpdated, bool enabled)
     {
         Visibility = stealthLevel;
         LastUpdated = lastUpdated;
+        Enabled = enabled;
     }
 }

Content.Shared/Stealth/SharedStealthSystem.cs

@@ -1,3 +1,4 @@
+using Content.Shared.Examine;
 using Content.Shared.Stealth.Components;
 using Robust.Shared.GameStates;
 using Robust.Shared.Timing;
@@ -17,6 +18,35 @@ public abstract class SharedStealthSystem : EntitySystem
         SubscribeLocalEvent<StealthComponent, MoveEvent>(OnMove);
         SubscribeLocalEvent<StealthComponent, EntityPausedEvent>(OnPaused);
         SubscribeLocalEvent<StealthComponent, ComponentInit>(OnInit);
+        SubscribeLocalEvent<StealthComponent, ExamineAttemptEvent>(OnExamine);
+    }
+
+    private void OnExamine(EntityUid uid, StealthComponent component, ExamineAttemptEvent args)
+    {
+        if (!component.Enabled || GetVisibility(uid, component) > component.ExamineThreshold)
+            return;
+
+        // Don't block examine for owner or children of the cloaked entity.
+        // Containers and the like should already block examining, so not bothering to check for occluding containers.
+        var source = args.Examiner;
+        do
+        {
+            if (source == uid)
+                return;
+            source = Transform(source).ParentUid;
+        }
+        while (source.IsValid());
+
+        args.Cancel();
+    }
+
+    public virtual void SetEnabled(EntityUid uid, bool value, StealthComponent? component = null)
+    {
+        if (!Resolve(uid, ref component, false) || component.Enabled == value)
+            return;
+
+        component.Enabled = value;
+        Dirty(component);
     }
 
     private void OnPaused(EntityUid uid, StealthComponent component, EntityPausedEvent args)
@@ -44,7 +74,7 @@ public abstract class SharedStealthSystem : EntitySystem
 
     private void OnStealthGetState(EntityUid uid, StealthComponent component, ref ComponentGetState args)
     {
-        args.State = new StealthComponentState(component.LastVisibility, component.LastUpdated);
+        args.State = new StealthComponentState(component.LastVisibility, component.LastUpdated, component.Enabled);
     }
 
     private void OnStealthHandleState(EntityUid uid, StealthComponent component, ref ComponentHandleState args)
@@ -52,6 +82,7 @@ public abstract class SharedStealthSystem : EntitySystem
         if (args.Current is not StealthComponentState cast)
             return;
 
+        SetEnabled(uid, cast.Enabled, component);
         component.LastVisibility = cast.Visibility;
         component.LastUpdated = cast.LastUpdated;
     }
@@ -83,7 +114,7 @@ public abstract class SharedStealthSystem : EntitySystem
             component.LastUpdated = _timing.CurTime;
         }
 
-        component.LastVisibility = Math.Clamp(component.LastVisibility + delta, -1f, 1f);
+        component.LastVisibility = Math.Clamp(component.LastVisibility + delta, component.MinVisibility, component.MaxVisibility);
         Dirty(component);
     }
 
@@ -96,7 +127,7 @@ public abstract class SharedStealthSystem : EntitySystem
         if (!Resolve(uid, ref component))
             return;
 
-        component.LastVisibility = value;
+        component.LastVisibility = Math.Clamp(value, component.MinVisibility, component.MaxVisibility);
         if (component.LastUpdated != null)
             component.LastUpdated = _timing.CurTime;
 
@@ -107,16 +138,18 @@ public abstract class SharedStealthSystem : EntitySystem
     /// Gets the current visibility from the <see cref="StealthComponent"/>
     /// Use this instead of getting LastVisibility from the component directly.
     /// </summary>
-    /// <returns>Returns a calculation that accounts for any stealth change that happened since last update, otherwise returns based on if it can resolve the component.</returns>
+    /// <returns>Returns a calculation that accounts for any stealth change that happened since last update, otherwise
+    /// returns based on if it can resolve the component. Note that the returned value may be larger than the components
+    /// maximum stealth value if it is currently disabled.</returns>
     public float GetVisibility(EntityUid uid, StealthComponent? component = null)
     {
-        if (!Resolve(uid, ref component))
+        if (!Resolve(uid, ref component) || !component.Enabled)
             return 1;
 
         if (component.LastUpdated == null)
             return component.LastVisibility;
 
         var deltaTime = _timing.CurTime - component.LastUpdated.Value;
-        return Math.Clamp(component.LastVisibility + (float) deltaTime.TotalSeconds * component.PassiveVisibilityRate, -1f, 1f);
+        return Math.Clamp(component.LastVisibility + (float) deltaTime.TotalSeconds * component.PassiveVisibilityRate, component.MinVisibility, component.MaxVisibility);
     }
 }

Resources/Prototypes/Entities/Mobs/Player/observer.yml

@@ -27,7 +27,7 @@
   - type: Input
     context: "ghost"
   - type: Examiner
-    DoRangeCheck: false
+    skipChecks: true
   - type: Ghost
   - type: IntrinsicRadio
     channels:

Resources/Prototypes/Entities/Structures/Storage/Closets/big_boxes.yml

@@ -49,6 +49,7 @@
 
 - type: entity
   id: StealthBox
+  suffix: stealth
   parent: BaseBigBox
   name: cardboard box #it's still just a box
   description: Kept ya waiting, huh?
@@ -74,6 +75,7 @@
 - type: entity
   id: GhostBox
   parent: StealthBox
+  suffix: 
   name: ghost box
   description: Beware!
   components: