Remove explosion visuals component references (#15264)

Content.Shared/Explosion/ExplosionVisualsComponent.cs

@@ -0,0 +1,56 @@
+using Robust.Shared.GameStates;
+using Robust.Shared.Map;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Explosion;
+
+/// <summary>
+///     Component that is used to send explosion overlay/visual data to an abstract explosion entity.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed class ExplosionVisualsComponent : Component
+{
+    public MapCoordinates Epicenter;
+    public Dictionary<int, List<Vector2i>>? SpaceTiles;
+    public Dictionary<EntityUid, Dictionary<int, List<Vector2i>>> Tiles = new();
+    public List<float> Intensity = new();
+    public string ExplosionType = string.Empty;
+    public Matrix3 SpaceMatrix;
+    public ushort SpaceTileSize;
+}
+
+[Serializable, NetSerializable]
+public sealed class ExplosionVisualsState : ComponentState
+{
+    public MapCoordinates Epicenter;
+    public Dictionary<int, List<Vector2i>>? SpaceTiles;
+    public Dictionary<EntityUid, Dictionary<int, List<Vector2i>>> Tiles;
+    public List<float> Intensity;
+    public string ExplosionType = string.Empty;
+    public Matrix3 SpaceMatrix;
+    public ushort SpaceTileSize;
+
+    public ExplosionVisualsState(
+        MapCoordinates epicenter,
+        string typeID,
+        List<float> intensity,
+        Dictionary<int, List<Vector2i>>? spaceTiles,
+        Dictionary<EntityUid, Dictionary<int, List<Vector2i>>> tiles,
+        Matrix3 spaceMatrix,
+        ushort spaceTileSize)
+    {
+        Epicenter = epicenter;
+        SpaceTiles = spaceTiles;
+        Tiles = tiles;
+        Intensity = intensity;
+        ExplosionType = typeID;
+        SpaceMatrix = spaceMatrix;
+        SpaceTileSize = spaceTileSize;
+    }
+}
+
+[Serializable, NetSerializable]
+public enum ExplosionAppearanceData
+{
+    Progress, // iteration index tracker for explosions that are still expanding outwards,
+}