fpopov thanks

ParkanPlayground/Msh0x06.cs

@@ -0,0 +1,45 @@
+using System.Buffers.Binary;
+using NResLib;
+
+namespace ParkanPlayground;
+
+/// <summary>
+/// MSH-компонент 0x06: индексный буфер
+/// </summary>
+public static class Msh0x06
+{
+    public static List<ushort> ReadComponent(
+        FileStream mshFs, NResArchive archive)
+    {
+        var entry = archive.Files.FirstOrDefault(x => x.FileType == "06 00 00 00");
+
+        if (entry is null)
+        {
+            throw new Exception("Archive doesn't contain file (06)");
+        }
+
+        if (entry.ElementSize != 2)
+        {
+            throw new Exception("Index buffer component (0x06) element size is not 2");
+        }
+
+        if (entry.FileLength % entry.ElementSize != 0)
+        {
+            throw new Exception("Index buffer component (0x06) payload size is not divisible by element size");
+        }
+
+        var data = new byte[entry.FileLength];
+        mshFs.Seek(entry.OffsetInFile, SeekOrigin.Begin);
+        mshFs.ReadExactly(data, 0, data.Length);
+
+        var elements = new List<ushort>(entry.FileLength / entry.ElementSize);
+        for (var i = 0; i < entry.FileLength / entry.ElementSize; i++)
+        {
+            elements.Add(
+                BinaryPrimitives.ReadUInt16LittleEndian(data.AsSpan(i * 2))
+            );
+        }
+
+        return elements;
+    }
+}