feat: add map drawing

Client/Domain/Service/MapImageSelector.cs

@@ -0,0 +1,56 @@
+using Client.Domain.ValueObjects;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace Client.Domain.Service
+{
+    public class MapImageSelector
+    {
+        private static readonly uint BLOCK_SIZE = 32768;
+        private static readonly uint DELTA_X = 20;
+        private static readonly uint DELTA_Y = 18;
+
+        public List<MapBlock> SelectImages(float viewportWidth, float viewportHeight, Vector3 heroPosition, float scale)
+        {
+            var viewportCenter = new Tuple<float, float>(viewportWidth / 2, viewportHeight / 2);
+
+            var topLeft = new Tuple<float, float>(
+                heroPosition.X - viewportCenter.Item1 * scale,
+                heroPosition.Y - viewportCenter.Item2 * scale
+            );
+            var bottomRight = new Tuple<float, float>(
+                heroPosition.X + viewportCenter.Item1 * scale,
+                heroPosition.Y + viewportCenter.Item2 * scale
+            );
+
+            uint top = (uint)(MathF.Floor(topLeft.Item2 / BLOCK_SIZE) + DELTA_Y);
+            uint bottom = (uint)(MathF.Floor(bottomRight.Item2 / BLOCK_SIZE) + DELTA_Y);
+            uint left = (uint)(MathF.Floor(topLeft.Item1 / BLOCK_SIZE) + DELTA_X);
+            uint right = (uint)(MathF.Floor(bottomRight.Item1 / BLOCK_SIZE) + DELTA_X);
+
+            List<MapBlock> result = new List<MapBlock>();
+            for (uint x = left; x <= right; x++)
+            {
+                for (uint y = top; y <= bottom; y++)
+                {
+                    Tuple<int, int> blockTopLeft = new Tuple<int, int>(
+                        (int)((x - DELTA_X) * BLOCK_SIZE),
+                        (int)((y - DELTA_Y) * BLOCK_SIZE)
+                    );
+                    Tuple<float, float> delta = new Tuple<float, float>(
+                        (blockTopLeft.Item1 - topLeft.Item1) / scale,
+                        (blockTopLeft.Item2 - topLeft.Item2) / scale
+                    );
+
+                    result.Add(new MapBlock(x, y, delta.Item1, delta.Item2, BLOCK_SIZE / scale));
+                }
+            }
+
+            return result;
+        }
+    }
+}