rename "tiles" to "obstacles"

Shared/World.cs

@@ -35,7 +35,7 @@ namespace SemiColinGames {
 
     // TODO: remove this.
     public const int TileSize = 16;
-    readonly Tile[] tiles;
+    readonly Tile[] obstacles;
     readonly Tile[] decorations;
     // Kept around for resetting the world's entities after player death or level restart.
     readonly JToken entitiesLayer;
@@ -134,8 +134,8 @@ namespace SemiColinGames {
       }
       // Get all the obstacles into a single array, sorted by X.
       obstacleTiles.AddRange(hazardTiles);
-      tiles = obstacleTiles.ToArray();
-      Array.Sort(tiles, CompareByX);
+      obstacles = obstacleTiles.ToArray();
+      Array.Sort(obstacles, CompareByX);
       // The background tiles are added before the rest of the decorations, so that they're drawn
       // in the back.
       backgroundTiles.AddRange(decorationTiles);
@@ -144,21 +144,21 @@ namespace SemiColinGames {
 
       // The obstacles are sorted by x-position. We maintain this invariant so that it's possible
       // to efficiently find CollisionTargets that are nearby a given x-position.
-      CollisionTargets = new AABB[tiles.Length + 2];
+      CollisionTargets = new AABB[obstacles.Length + 2];
 
       // Add a synthetic collisionTarget on the left side of the world.
       CollisionTargets[0] = new AABB(new Vector2(-1, 0), new Vector2(1, float.MaxValue));
 
-      // Now add all the normal collisionTargets for every static terrain tile.
+      // Now add all the normal collisionTargets for every obstacle.
       Vector2 halfSize = new Vector2(TileSize / 2, TileSize / 2);
-      for (int i = 0; i < tiles.Length; i++) {
+      for (int i = 0; i < obstacles.Length; i++) {
         Vector2 center = new Vector2(
-          tiles[i].Position.Left + halfSize.X, tiles[i].Position.Top + halfSize.Y);
-        CollisionTargets[i + 1] = new AABB(center, halfSize, tiles[i]);
+          obstacles[i].Position.Left + halfSize.X, obstacles[i].Position.Top + halfSize.Y);
+        CollisionTargets[i + 1] = new AABB(center, halfSize, obstacles[i]);
       }
 
       // Add a final synthetic collisionTarget on the right side of the world.
-      CollisionTargets[tiles.Length + 1] = new AABB(
+      CollisionTargets[obstacles.Length + 1] = new AABB(
           new Vector2(Width + 1, 0), new Vector2(1, float.MaxValue));
     }
 
@@ -176,6 +176,7 @@ namespace SemiColinGames {
       (Player, npcs) = ParseEntities(entitiesLayer);
     }
 
+    // Draws everything that's behind the player, from back to front.
     public void DrawBackground(SpriteBatch spriteBatch) {
       foreach (Tile t in decorations) {
         t.Draw(spriteBatch);
@@ -185,8 +186,9 @@ namespace SemiColinGames {
       }
     }
 
+    // Draws everything that's in front of the player, from back to front.
     public void DrawForeground(SpriteBatch spriteBatch) {
-      foreach (Tile t in tiles) {
+      foreach (Tile t in obstacles) {
         t.Draw(spriteBatch);
       }
     }