The long overdue downfall of stun meta - Stamina resists on Nukie & ERT Suits. (#35580)

* Add stamina damage resistance

* Probably starting a civil war within the community.

* Tweak some values, my chart was outdated.

* Tone down the values

* Allow a way to bypass the resistances, which forks downstream can use.

* Apply suggestions from code review

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>

* Comment out the changes to non-deathsquad suits.

* minor text fix e

* review

---------

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>
Co-authored-by: SlamBamActionman <slambamactionman@gmail.com>
Co-authored-by: Milon <milonpl.git@proton.me>

Content.Shared/Damage/Components/StaminaResistanceComponent.cs

@@ -0,0 +1,38 @@
+using Content.Shared.Damage.Systems;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Dictionary;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Damage.Components;
+
+/// <summary>
+/// Component that provides entities with stamina resistance.
+/// By default this is applied when worn, but to solely protect the entity itself and
+/// not the wearer use <c>worn: false</c>.
+/// </summary>
+/// <remarks>
+/// This is desirable over just using damage modifier sets, given that equipment like bomb-suits need to
+/// significantly reduce the damage, but shouldn't be silly overpowered in regular combat.
+/// </remarks>
+[NetworkedComponent, RegisterComponent, AutoGenerateComponentState]
+public sealed partial class StaminaResistanceComponent : Component
+{
+    /// <summary>
+    /// The stamina resistance coefficient, This fraction is multiplied into the total resistance.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float DamageCoefficient = 1;
+
+    /// <summary>
+    /// When true, resistances will be applied to the entity wearing this item.
+    /// When false, only this entity will get the resistance.
+    /// </summary>
+    [DataField]
+    public bool Worn = true;
+
+    /// <summary>
+    /// Examine string for stamina resistance.
+    /// Passed <c>value</c> from 0 to 100.
+    /// </summary>
+    [DataField]
+    public LocId Examine = "stamina-resistance-coefficient-value";
+}

Content.Shared/Damage/Events/BeforeStaminaDamageEvent.cs

@@ -0,0 +1,12 @@
+using Content.Shared.Inventory;
+
+namespace Content.Shared.Damage.Events;
+
+/// <summary>
+/// Raised before stamina damage is dealt to allow other systems to cancel or modify it.
+/// </summary>
+[ByRefEvent]
+public record struct BeforeStaminaDamageEvent(float Value, bool Cancelled = false) : IInventoryRelayEvent
+{
+    SlotFlags IInventoryRelayEvent.TargetSlots =>  ~SlotFlags.POCKET;
+}

Content.Shared/Damage/Systems/SharedGodmodeSystem.cs

@@ -1,4 +1,5 @@
 using Content.Shared.Damage.Components;
+using Content.Shared.Damage.Events;
 using Content.Shared.Rejuvenate;
 using Content.Shared.Slippery;
 using Content.Shared.StatusEffect;

Content.Shared/Damage/Systems/StaminaSystem.Resistance.cs

@@ -0,0 +1,38 @@
+using Content.Shared.Armor;
+using Content.Shared.Damage.Components;
+using Content.Shared.Damage.Events;
+using Content.Shared.Inventory;
+
+namespace Content.Shared.Damage.Systems;
+
+public sealed partial class StaminaSystem
+{
+    private void InitializeResistance()
+    {
+        SubscribeLocalEvent<StaminaResistanceComponent, BeforeStaminaDamageEvent>(OnGetResistance);
+        SubscribeLocalEvent<StaminaResistanceComponent, InventoryRelayedEvent<BeforeStaminaDamageEvent>>(RelayedResistance);
+        SubscribeLocalEvent<StaminaResistanceComponent, ArmorExamineEvent>(OnArmorExamine);
+    }
+
+    private void OnGetResistance(Entity<StaminaResistanceComponent> ent, ref BeforeStaminaDamageEvent args)
+    {
+        args.Value *= ent.Comp.DamageCoefficient;
+    }
+
+    private void RelayedResistance(Entity<StaminaResistanceComponent> ent, ref InventoryRelayedEvent<BeforeStaminaDamageEvent> args)
+    {
+        if (ent.Comp.Worn)
+            OnGetResistance(ent, ref args.Args);
+    }
+
+    private void OnArmorExamine(Entity<StaminaResistanceComponent> ent, ref ArmorExamineEvent args)
+    {
+        var value = MathF.Round((1f - ent.Comp.DamageCoefficient) * 100, 1);
+
+        if (value == 0)
+            return;
+
+        args.Msg.PushNewline();
+        args.Msg.AddMarkupOrThrow(Loc.GetString(ent.Comp.Examine, ("value", value)));
+    }
+}

Content.Shared/Damage/Systems/StaminaSystem.cs

@@ -50,6 +50,7 @@ public sealed partial class StaminaSystem : EntitySystem
         base.Initialize();
 
         InitializeModifier();
+        InitializeResistance();
 
         SubscribeLocalEvent<StaminaComponent, ComponentStartup>(OnStartup);
         SubscribeLocalEvent<StaminaComponent, ComponentShutdown>(OnShutdown);
@@ -240,7 +241,7 @@ public sealed partial class StaminaSystem : EntitySystem
     }
 
     public void TakeStaminaDamage(EntityUid uid, float value, StaminaComponent? component = null,
-        EntityUid? source = null, EntityUid? with = null, bool visual = true, SoundSpecifier? sound = null)
+        EntityUid? source = null, EntityUid? with = null, bool visual = true, SoundSpecifier? sound = null, bool ignoreResist = false)
     {
         if (!Resolve(uid, ref component, false))
             return;
@@ -250,6 +251,12 @@ public sealed partial class StaminaSystem : EntitySystem
         if (ev.Cancelled)
             return;
 
+        // Allow stamina resistance to be applied.
+        if (!ignoreResist)
+        {
+            value = ev.Value;
+        }
+
         value = UniversalStaminaDamageModifier * value;
 
         // Have we already reached the point of max stamina damage?
@@ -399,9 +406,3 @@ public sealed partial class StaminaSystem : EntitySystem
         _adminLogger.Add(LogType.Stamina, LogImpact.Low, $"{ToPrettyString(uid):user} recovered from stamina crit");
     }
 }
-
-/// <summary>
-///     Raised before stamina damage is dealt to allow other systems to cancel it.
-/// </summary>
-[ByRefEvent]
-public record struct BeforeStaminaDamageEvent(float Value, bool Cancelled = false);

Content.Shared/Inventory/InventorySystem.Relay.cs

@@ -5,6 +5,7 @@ using Content.Shared.Chemistry;
 using Content.Shared.Chemistry.Hypospray.Events;
 using Content.Shared.Climbing.Events;
 using Content.Shared.Damage;
+using Content.Shared.Damage.Events;
 using Content.Shared.Electrocution;
 using Content.Shared.Explosion;
 using Content.Shared.Eye.Blinding.Systems;
@@ -45,6 +46,7 @@ public partial class InventorySystem
         SubscribeLocalEvent<InventoryComponent, CoefficientQueryEvent>(RelayInventoryEvent);
 
         // by-ref events
+        SubscribeLocalEvent<InventoryComponent, BeforeStaminaDamageEvent>(RefRelayInventoryEvent);
         SubscribeLocalEvent<InventoryComponent, GetExplosionResistanceEvent>(RefRelayInventoryEvent);
         SubscribeLocalEvent<InventoryComponent, IsWeightlessEvent>(RefRelayInventoryEvent);
         SubscribeLocalEvent<InventoryComponent, GetSpeedModifierContactCapEvent>(RefRelayInventoryEvent);