magic visibility

Content.Client/_CP14/MagicSpell/CP14ClientMagicVisionSystem.cs

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+using Content.Shared._CP14.MagicSpell;
+using Content.Shared._CP14.MagicSpell.Components;
+using Robust.Client.GameObjects;
+using Robust.Client.Timing;
+using Robust.Shared.Console;
+
+namespace Content.Client._CP14.MagicSpell;
+
+public sealed class CP14ClientMagicVisionSystem : CP14SharedMagicVisionSystem
+{
+    [Dependency] private readonly IClientGameTiming _timing = default!;
+    public bool MagicVisible { get; set; }
+
+    private TimeSpan _nextUpdate = TimeSpan.Zero;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<CP14MagicVisionMarkerComponent, ComponentStartup>(OnStartup);
+    }
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        if (_timing.CurTime < _nextUpdate)
+            return;
+
+        _nextUpdate = _timing.CurTime + TimeSpan.FromSeconds(1f);
+
+        var query = EntityQueryEnumerator<CP14MagicVisionMarkerComponent, SpriteComponent>();
+        while (query.MoveNext(out var uid, out var marker, out var sprite))
+        {
+            UpdateVisibility((uid, marker), sprite);
+        }
+    }
+
+    private void OnStartup(Entity<CP14MagicVisionMarkerComponent> ent, ref ComponentStartup args)
+    {
+        if (!TryComp<SpriteComponent>(ent, out var sprite))
+            return;
+
+        ent.Comp.SpawnTime = _timing.CurTime;
+        ent.Comp.EndTime = _timing.CurTime + ent.Comp.VisibilityTime;
+
+        UpdateVisibility(ent, sprite);
+    }
+
+    private void UpdateVisibility(Entity<CP14MagicVisionMarkerComponent> ent, SpriteComponent sprite)
+    {
+        sprite.Visible = MagicVisible;
+
+
+
+        if (MagicVisible == false)
+            return;
+
+        var progress = Math.Clamp((_timing.CurTime.TotalSeconds - ent.Comp.SpawnTime.TotalSeconds) / (ent.Comp.EndTime.TotalSeconds - ent.Comp.SpawnTime.TotalSeconds), 0, 1);
+        var alpha = 1 - progress;
+        Log.Info($"{ent.Owner.Id} - {alpha.ToString()}");
+        sprite.Color = Color.White.WithAlpha((float)alpha);
+    }
+}
+
+internal sealed class ShowMagicCommand : LocalizedCommands
+{
+    [Dependency] private readonly IEntitySystemManager _entitySystemManager = default!;
+
+    public override string Command => "cp14_showmagic";
+
+    public override string Help => "Toggle visibility of magic traces";
+
+    public override void Execute(IConsoleShell shell, string argStr, string[] args)
+    {
+        _entitySystemManager.GetEntitySystem<CP14ClientMagicVisionSystem>().MagicVisible ^= true;
+    }
+}

Content.Server/_CP14/MagicSpell/CP14MagicVisionSystem.cs

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+using Content.Shared._CP14.MagicSpell;
+using Content.Shared._CP14.MagicSpell.Components;
+using Robust.Shared.Timing;
+
+namespace Content.Server._CP14.MagicSpell;
+
+public sealed class CP14MagicVisionSystem : CP14SharedMagicVisionSystem
+{
+    [Dependency] private readonly IGameTiming _timing = default!;
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        var query = EntityQueryEnumerator<CP14MagicVisionMarkerComponent>();
+        while (query.MoveNext(out var uid, out var marker))
+        {
+            if (_timing.CurTime < marker.EndTime)
+                continue;
+
+            QueueDel(uid);
+        }
+    }
+}

Content.Shared/_CP14/MagicSpell/CP14SharedMagicVisionSystem.cs

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+using Content.Shared._CP14.MagicSpell.Components;
+using Robust.Shared.Timing;
+
+namespace Content.Shared._CP14.MagicSpell;
+
+public abstract class CP14SharedMagicVisionSystem : EntitySystem
+{
+    [Dependency] private readonly IGameTiming _timing = default!;
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<CP14MagicVisionMarkerComponent, MapInitEvent>(OnMapInit);
+    }
+
+    private void OnMapInit(Entity<CP14MagicVisionMarkerComponent> ent, ref MapInitEvent args)
+    {
+        ent.Comp.SpawnTime = _timing.CurTime;
+        ent.Comp.EndTime = _timing.CurTime + ent.Comp.VisibilityTime;
+    }
+}

Content.Shared/_CP14/MagicSpell/Components/CP14MagicVisionMarkerComponent.cs

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+namespace Content.Shared._CP14.MagicSpell.Components;
+
+/// <summary>
+/// Controls the visibility of this entity to the client, based on the length of time it has existed and the client's ability to see the magic
+/// </summary>
+[RegisterComponent, AutoGenerateComponentPause]
+public sealed partial class CP14MagicVisionMarkerComponent : Component
+{
+    [DataField, AutoPausedField]
+    public TimeSpan SpawnTime = TimeSpan.Zero;
+
+    [DataField, AutoPausedField]
+    public TimeSpan EndTime = TimeSpan.Zero;
+
+    [DataField]
+    public TimeSpan VisibilityTime = TimeSpan.FromMinutes(2f);
+}

Resources/Prototypes/_CP14/Entities/TEST.yml

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+- type: entity
+  id: CP14MagicTrace
+  categories: [ ForkFiltered ]
+  components:
+  - type: Sprite
+    drawdepth: Effects
+    snapCardinals: true
+    sprite: _CP14/Effects/fire.rsi
+    layers:
+      - state: full
+        shader: unshaded
+  - type: Clickable
+  - type: CP14MagicVisionMarker
+    visibilityTime: 30