riversong code showcase

Source/Riversong/Game/World/WaterMap.cs

@@ -0,0 +1,22 @@
+using Unity.Collections;
+using Unity.Mathematics;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class WaterMap : NativeGrid<int>
+    {
+        public WaterMap(int2 size) : base(size, Allocator.Persistent)
+        {
+        }
+
+        public bool IsWater(int2 tile)
+        {
+            return GetValue(tile) == 0;
+        }
+
+        public bool IsNearWater(int2 tile)
+        {
+            return GetValue(tile) is > 0 and < int.MaxValue;
+        }
+    }
+}