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Stage 1: LawnMowers

Objective 🧐🗿​

We are going to help out the players that are not good at video games. To do this, we will add a last line of defense to our game: LawnMowers. Instead of grass they will be cutting down zombies.

Step 1 - Set up the Environment 🌍🌱​

1.1 Unity Interface and Camera Movement Recap​

First, ensure you are operating in a 2D game environment. Go to Edit > Project Settings > Editor and enable Enter Play Mode Options for efficient testing.

Familiarize yourself with key areas of the Unity Editor:

  • Scene View: Build and modify your game space.
  • Game View: Preview the game as you develop.
  • Inspector: Adjust settings and properties of selected game elements.

Navigation Tips:

  • Rotate the scene with the right mouse button.
  • Pan using the middle mouse button or holding Alt + left mouse button.
  • Zoom in and out with the scroll wheel.

Adjust the camera to cover the main gameplay area. This setting is crucial as it determines what the player sees.

Step 2 - Set up the Objects 📦🔧​

2.1 Finding a LawnMower​

LawnMower Sprite:

  • Create or find a lawnmower sprite to use for our game. (Or you can use a lambo)
  • If you are really good at drawing, bonus points for drawing one yourself. Just make sure the image will have a transparent background!

2.2 Create Basic LawnMower Object​

Setup:

  • In Unity, create a new Sprite object in your scene and name it 'LawnMower'.
  • It will have a box collider 2D with onTrigger checked.
  • It will always have Rigidbody 2D with gravity scale equals to 0 and collision detection to continuous.

Sprite Renderer:

  • Attach your lawnmower sprite using the Sprite Renderer component to visualize the lawnmower in your game.

Transforms:

  • Position the lawnmower to fit the scene appropriately. Adjust scale and rotation if necessary.

Step 3 - Set up the Lawnmower Script 🌿🚜​

3.1 Script Basic Lawnmower Movement​

Create a script named LawnmowerMovement to define basic behaviors:

LawnMower Class:
   Declare variables:
      - isMoving: a boolean to track if the lawnmower is moving.
      - speed: a float to define the speed of the lawnmower.
      - sound: an audio clip for the sound effect.
      - source: a private audio source to play the sound.

   Start method:
      - Add an audio source component to the game object.
      - Assign the added audio source to the private variable source.

   OnTriggerEnter2D method:
      - Check if the collided object's layer is 7.
      - If isMoving is false:
      - Play the sound using the audio source.
      - Call the hit method on the ZombieScript component of the collided object with parameters 100 and false.
      - Set isMoving to true.
      - Schedule the destruction of the game object after 8 seconds.

    Update method:
      - If isMoving is true, then update the position of the game object by adding (speed * Time.deltaTime, 0, 0) to its current position.

Step 4 - Duplicate Lawnmowers 🔁🚜​

4.1 Create 5 Lawnmowers​

Lawnmower Object:

  • Create an empty object to store all five (or how ever many) lawnmowers for good organization.

Tip: If you find the interface unfamiliar or challenging:

  • Take extra time to experiment.
  • Add various objects, explore different settings, and observe their effects in the Game View.
  • Familiarity now will make advanced lessons more accessible.
Medium: Add sounds to the lawnmower.

Goal: Add sound effects when the lawnmower triggers.

5.1 Create an audio component

After adding the component, assign a sound clip to the component.

5.2 Modify the script

Make the sound play when the lawnmower triggers in the lawnmower script.

Hard: Make the lawnmower respawn after some time

**Goal: Create a way for the lawnmovers to respawn after used. **

6.1 Add respawn script to lawnmower

As a pro gamer, we will have to add a respawn time to our lawnmower script. Hint: Time.

  • You're doing great! Stay curious and proactive in your learning!