Update content vectors to numerics (#17759)

Content.Shared/NPC/SharedPathfindingSystem.cs

@@ -1,3 +1,5 @@
+using System.Numerics;
+
 namespace Content.Shared.NPC;
 
 public abstract class SharedPathfindingSystem : EntitySystem
@@ -9,15 +11,18 @@ public abstract class SharedPathfindingSystem : EntitySystem
     public const byte SubStep = 4;
 
     public const byte ChunkSize = 8;
+    public static readonly Vector2 ChunkSizeVec = new(ChunkSize, ChunkSize);
 
     /// <summary>
     /// We won't do points on edges so we'll offset them slightly.
     /// </summary>
     protected const float StepOffset = 1f / SubStep / 2f;
 
+    private static readonly Vector2 StepOffsetVec = new(StepOffset, StepOffset);
+
     public Vector2 GetCoordinate(Vector2i chunk, Vector2i index)
     {
-        return new Vector2(index.X, index.Y) / SubStep+ (chunk) * ChunkSize + StepOffset;
+        return new Vector2(index.X, index.Y) / SubStep+ (chunk) * ChunkSizeVec + StepOffsetVec;
     }
 
     public static float ManhattanDistance(Vector2i start, Vector2i end)