Salvage expeditions (#12745)

Content.Shared/Parallax/Biomes/Layers/BiomeEntityLayer.cs

@@ -0,0 +1,27 @@
+using Content.Shared.Maps;
+using Robust.Shared.Noise;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.List;
+
+namespace Content.Shared.Parallax.Biomes.Layers;
+
+[Serializable, NetSerializable]
+public sealed class BiomeEntityLayer : IBiomeWorldLayer
+{
+    /// <inheritdoc/>
+    [DataField("allowedTiles", customTypeSerializer:typeof(PrototypeIdListSerializer<ContentTileDefinition>))]
+    public List<string> AllowedTiles { get; } = new();
+
+    [DataField("noise")] public FastNoiseLite Noise { get; } = new(0);
+
+    /// <inheritdoc/>
+    [DataField("threshold")]
+    public float Threshold { get; } = 0.5f;
+
+    /// <inheritdoc/>
+    [DataField("invert")] public bool Invert { get; } = false;
+
+    [DataField("entities", required: true, customTypeSerializer: typeof(PrototypeIdListSerializer<EntityPrototype>))]
+    public List<string> Entities = new();
+}