Add hologram shader (#68)

* Add holograms!

* Updated localization files

Content.Client/DeltaV/Hologram/HologramSystem.cs

@@ -0,0 +1,48 @@
+using Content.Shared.DeltaV.Hologram;
+using Robust.Client.GameObjects;
+using Robust.Client.Graphics;
+using Robust.Shared.Prototypes;
+
+namespace Content.Client.DeltaV.Hologram;
+
+public sealed class HologramSystem : SharedHologramSystem
+{
+    [Dependency] private readonly IPrototypeManager _protoMan = default!;
+    [Dependency] private readonly OccluderSystem _occluder = default!;
+    [Dependency] private readonly EntityManager _entMan = default!;
+
+    private ShaderInstance _shader = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        _shader = _protoMan.Index<ShaderPrototype>("Hologram").InstanceUnique();
+        SubscribeLocalEvent<HologramComponent, ComponentShutdown>(OnShutdown);
+        SubscribeLocalEvent<HologramComponent, ComponentStartup>(OnStartup);
+    }
+
+    private void SetShader(EntityUid uid, bool enabled, HologramComponent? component = null, SpriteComponent? sprite = null)
+    {
+        if (!Resolve(uid, ref component, ref sprite, false))
+            return;
+
+        sprite.PostShader = enabled ? _shader : null;
+    }
+
+    private void OnStartup(EntityUid uid, HologramComponent component, ComponentStartup args)
+    {
+        SetShader(uid, true, component);
+
+        component.Occludes = _entMan.TryGetComponent<OccluderComponent>(uid, out var occluder) && occluder.Enabled;
+        if (component.Occludes)
+            _occluder.SetEnabled(uid, false);
+    }
+
+    private void OnShutdown(EntityUid uid, HologramComponent component, ComponentShutdown args)
+    {
+        SetShader(uid, false, component);
+        if (component.Occludes)
+            _occluder.SetEnabled(uid, true);
+    }
+}

Content.Server/DeltaV/Hologram/HologramSystem.cs

@@ -0,0 +1,43 @@
+using Content.Shared.Actions.Events;
+using Content.Shared.DeltaV.Hologram;
+using Content.Shared.Examine;
+using Content.Shared.IdentityManagement;
+using Content.Shared.Popups;
+using Robust.Shared.Player;
+
+namespace Content.Server.DeltaV.Hologram;
+
+public sealed class HologramSystem : SharedHologramSystem
+{
+    [Dependency] private readonly SharedPopupSystem _popup = default!;
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<HologramComponent, ExaminedEvent>(OnExamine);
+        SubscribeLocalEvent<HologramComponent, DisarmAttemptEvent>(OnDisarmAttempt);
+    }
+
+    private void OnExamine(EntityUid uid, HologramComponent component, ExaminedEvent args)
+    {
+        args.PushMarkup(Loc.GetString("hologram-on-examine"));
+    }
+
+    private void OnDisarmAttempt(EntityUid uid, HologramComponent component, DisarmAttemptEvent args)
+    {
+        if (component.PreventDisarm)
+        {
+            args.Cancel();
+
+            var filterOther = Filter.PvsExcept(args.DisarmerUid, entityManager: EntityManager);
+            var messageUser = Loc.GetString("hologram-disarm-blocked",
+                ("target", Identity.Entity(args.TargetUid, EntityManager)));
+            var messageOther = Loc.GetString("hologram-disarm-blocked-other",
+                ("target", Identity.Entity(args.TargetUid, EntityManager)), ("performerName", args.DisarmerUid));
+
+            _popup.PopupEntity(messageOther, args.DisarmerUid, filterOther, true);
+            _popup.PopupEntity(messageUser, args.TargetUid, args.DisarmerUid);
+        }
+
+    }
+}

Content.Shared/DeltaV/Hologram/HologramComponent.cs

@@ -0,0 +1,21 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.DeltaV.Hologram;
+
+[RegisterComponent, NetworkedComponent]
+[Access(typeof(SharedHologramSystem))]
+public sealed partial class HologramComponent : Component
+{
+    /// <summary>
+    /// To save the state of whatever the component was added to, in case it occludes when the component is added.
+    /// </summary>
+    [DataField("occludes")]
+    public bool Occludes = false;
+
+    /// <summary>
+    /// Do we stop disarms or not?
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField("preventDisarm")]
+    public bool PreventDisarm = false;
+}

Content.Shared/DeltaV/Hologram/SharedHologramSystem.cs

@@ -0,0 +1,5 @@
+namespace Content.Shared.DeltaV.Hologram;
+
+public abstract class SharedHologramSystem : EntitySystem
+{
+}

Resources/Locale/en-US/deltav/hologram/hologram.ftl

@@ -0,0 +1,3 @@
+hologram-on-examine = [color=lightblue]It is but a transient specter...[/color]
+hologram-disarm-blocked = Your hand phases through {THE($target)}.
+hologram-disarm-blocked-other = {THE($performerName)}'s hand phases through {THE($target)}.

Resources/Prototypes/DeltaV/shaders.yml

@@ -0,0 +1,8 @@
+# hologram
+- type: shader
+  id: Hologram
+  kind: source
+  path: "/Textures/DeltaV/Shaders/hologram.swsl"
+  params:
+    textureHeight: 32
+    hue: 0.64