Normalize vector before reflecting for bat bounce.

articles/tutorials/building_2d_games/12_collision_detection/index.md

@@ -311,7 +311,7 @@ If you run the game right now and move the slime around, you will notice a few i
 
 We can now implement these features using collision detection and response in our game. In the *DungeonSlime* project (your main game project), open the `Game1.cs` file and make the following changes to the `Game1` class:
 
-[!code-csharp[](./snippets/game1.cs?highlight=1,5,25-29,40-45,76–176,181–193,293–294)]
+[!code-csharp[](./snippets/game1.cs?highlight=1,5,25-29,40-45,76–177,182–194,294–295)]
 
 The key changes made here are:
 

articles/tutorials/building_2d_games/12_collision_detection/snippets/game1.cs

@@ -151,6 +151,7 @@ protected override void Update(GameTime gameTime)
         // normal.
         if (normal != Vector2.Zero)
         {
+            normal.Normalize();
             _batVelocity = Vector2.Reflect(_batVelocity, normal);
         }
 

articles/tutorials/building_2d_games/13_working_with_tilemaps/index.md

@@ -186,7 +186,7 @@ This tilemap configuration creates a simple dungeon layout with walls around the
 
 With all of the assets now in place and configured, we can update the `Game1` class to load the tilemap and draw it. We will also need to update the collision logic so that the boundary is no longer the edge of the screen, but instead the edges of the wall tiles of the tilemap. Open `Game1.cs` and make the following updates:
 
-[!code-csharp[](./snippets/game1.cs?highlight=31-35,46-61,80-82,109,111,113,125,118,120,122,124,142,145,147,150,153,156,158,161,176–178,300–301)]
+[!code-csharp[](./snippets/game1.cs?highlight=31-35,46-61,80-82,109,111,113,125,118,120,122,124,142,145,147,150,153,156,158,161,177–179,301–302)]
 
 The key changes to the `Game1` class include:
 

articles/tutorials/building_2d_games/13_working_with_tilemaps/snippets/game1.cs

@@ -166,6 +166,7 @@ protected override void Update(GameTime gameTime)
         // normal.
         if (normal != Vector2.Zero)
         {
+            normal.Normalize();
             _batVelocity = Vector2.Reflect(_batVelocity, normal);
         }
 

articles/tutorials/building_2d_games/14_soundeffects_and_music/index.md

@@ -175,7 +175,7 @@ Add these files to your content project using the MGCB Editor:
 
 Next, open the `Game1.cs` file and update it to the following:
 
-[!code-csharp[](./snippets/game1.cs?highlight=3,6,39-43,92-111,200-201,219-220)]
+[!code-csharp[](./snippets/game1.cs?highlight=3,6,39-43,92-111,201-202,220-221)]
 
 The key changes here are:
 

articles/tutorials/building_2d_games/14_soundeffects_and_music/snippets/game1.cs

@@ -195,6 +195,7 @@ protected override void Update(GameTime gameTime)
         // normal.
         if (normal != Vector2.Zero)
         {
+            normal.Normalize();
             _batVelocity = Vector2.Reflect(_batVelocity, normal);
 
             // Play the bounce sound effect

articles/tutorials/building_2d_games/15_audio_controller/index.md

@@ -131,7 +131,7 @@ The key changes made here are:
 
 Next, update the `Game1` class to use the audio controller for audio playback. Open `Game1.cs` and make the following updates:
 
-[!code-csharp[](./snippets/game1.cs?highlight=45-46,77-78,104-105,194–195,213–214,267–285)]
+[!code-csharp[](./snippets/game1.cs?highlight=45-46,77-78,104-105,195–196,214–215,268–286)]
 
 > [!NOTE]
 > Note there were a lot of replacements in the `LoadContent` method, switching from loading and initializing the background Song and replacing it with a call to the new `AudioController` to do all the work managing the Song reference. Much cleaner.

articles/tutorials/building_2d_games/15_audio_controller/snippets/game1.cs

@@ -189,6 +189,7 @@ protected override void Update(GameTime gameTime)
         // normal.
         if (normal != Vector2.Zero)
         {
+            normal.Normalize();
             _batVelocity = Vector2.Reflect(_batVelocity, normal);
 
             // Play the bounce sound effect.

articles/tutorials/building_2d_games/16_working_with_spritefonts/index.md

@@ -217,7 +217,7 @@ The key changes here are:
 
 Finally, open the `Game1.cs` file and make the following changes:
 
-[!code-csharp[](./snippets/game1.cs?highlight=48-58,93-99,129-130,240-241,385-396)]
+[!code-csharp[](./snippets/game1.cs?highlight=48-58,93-99,129-130,241-242,386-397)]
 
 The key changes made are:
 

articles/tutorials/building_2d_games/16_working_with_spritefonts/snippets/game1.cs

@@ -213,6 +213,7 @@ protected override void Update(GameTime gameTime)
         // normal.
         if (normal != Vector2.Zero)
         {
+            normal.Normalize();
             _batVelocity = Vector2.Reflect(_batVelocity, normal);
 
             // Play the bounce sound effect.

articles/tutorials/building_2d_games/17_scenes/snippets/gamescene.cs

@@ -215,6 +215,7 @@ public override void Update(GameTime gameTime)
         // normal.
         if (normal != Vector2.Zero)
         {
+            normal.Normalize();
             _batVelocity = Vector2.Reflect(_batVelocity, normal);
 
             // Play the bounce sound effect.

articles/tutorials/building_2d_games/22_snake_game_mechanics/snippets/bat/bounce.cs

@@ -24,6 +24,9 @@ public void Bounce(Vector2 normal)
     // Apply the new position
     Position = newPosition;
 
+    // Normalize before reflecting
+    normal.Normalize();
+
     // Apply reflection based on the normal.
     _velocity = Vector2.Reflect(_velocity, normal);