remove World.TileSize constant

Shared/LinesOfSight.cs

@@ -68,13 +68,12 @@ namespace SemiColinGames {
         Vector2 closestHit = Vector2.Add(eyePos, rotated);
         float hitTime = 1f;
 
-        Vector2 halfTileSize = new Vector2(World.TileSize / 2.0f, World.TileSize / 2.0f);
         for (int j = 0; j < collisionTargets.Length; j++) {
           AABB box = collisionTargets[j];
-          if (Math.Abs(box.Position.X - npc.Position.X) > visionRange + halfTileSize.X) {
+          if (Math.Abs(box.Position.X - npc.Position.X) > visionRange + box.HalfSize.X) {
             continue;
           }
-          Vector2 delta = Vector2.Add(halfTileSize, Vector2.Subtract(box.Position, eyePos));
+          Vector2 delta = Vector2.Add(box.HalfSize, Vector2.Subtract(box.Position, eyePos));
           if (delta.LengthSquared() > visionRangeSq) {
             continue;
           }

Shared/World.cs

@@ -8,8 +8,6 @@ namespace SemiColinGames {
 
   public sealed class World : IDisposable {
 
-    public const int TileSize = 16;
-
     // Size of World in terms of tile grid.
     private int gridWidth;
     private int gridHeight;