riversong code showcase

Source/Riversong/Game/Collections/NativeGrid.cs

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+using System;
+using Unity.Collections;
+using Unity.Collections.LowLevel.Unsafe;
+using Unity.Mathematics;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class NativeGrid<T> : IDisposable where T : struct
+    {
+        private NativeArray<T> _data;
+
+        public NativeGrid(int2 size, Allocator allocator)
+        {
+            Size = size;
+            _data = new NativeArray<T>(Size.x * Size.y, allocator);
+        }
+
+        public int2 Size { get; }
+
+        protected int GetIndex(int2 point)
+        {
+            return math.mad(point.y, Size.x, point.x);
+        }
+
+        public T GetValue(int index)
+        {
+            return _data[index];
+        }
+
+        public T GetValue(int2 point)
+        {
+            return GetValue(GetIndex(point));
+        }
+
+        public unsafe ref T GetValueRW(int index)
+        {
+            return ref UnsafeUtility.ArrayElementAsRef<T>(_data.GetUnsafePtr(), index);
+        }
+
+        public ref T GetValueRW(int2 point)
+        {
+            return ref GetValueRW(GetIndex(point));
+        }
+
+        public void SetValue(int index, T value)
+        {
+            _data[index] = value;
+        }
+
+        public void SetValue(int2 point, T value)
+        {
+            SetValue(GetIndex(point), value);
+        }
+
+        public NativeArray<T> GetNativeArray()
+        {
+            return _data;
+        }
+
+        public void Dispose()
+        {
+            _data.Dispose();
+        }
+    }
+}