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AnimalBuster Part 3 - Create Enemy and Buildings

Overview​

You will build an interactive VR shooting game using XRCC in this tutorial. Please go through Animal Buster part 1 and part 2 before this tutorial.

Step 1: Spawn the Enemy​

  1. Open the Asset Panel:
    • Spawn a rabbit model and rename it to Enemy.
  2. Set Enemy Attributes:
    • Enable the following attributes:
      • Interactable
      • Physics
      • Use Gravity
    • Freeze the rotation.
    • Set the scale to 2, 2, 2.

Step 2: Define Enemy Variables​

  1. Switch to the Behavior Tab:
    • Open the Variable Panel.
  2. Create HP Variable:
    • Define a number variable named HP with a default value of 10.

Step 3: Create Take Damage Action​

  1. Define the Action:
    • Create an action named Take Damage.
  2. Setup Damage Logic:
    • Drag the following nodes to check if HP is 0 or above:
      • Branch node (from Flow Control section)
      • Get Number node (from Variable section)
      • Compare node (from Math section)
    • Then, drag the following nodes to subtract HP by 1:
      • Set Number node (from Variable section)
      • Get Number node (from Variable section)
      • Subtract node (from Math section)

Step 4: Create the Building​

  1. Return to the Edit Tab:
    • Spawn a wood in the Asset Panel.
  2. Set Building Attributes:
    • Enable the following attributes:
      • Physics
      • Use Gravity

Step 5: Setup Building Behavior​

  1. Go to Wood's Behavior:
    • Drag the following nodes:
      • Start Contact node (from Item Event section)
      • Call Action node (from Flow Control section)
    • This setup will call the Take Damage action when the wood contacts the enemy.

Step 6: Duplicate the Wood​

  1. Return to the Edit Tab:
    • Duplicate the wood object to build your game scene.

Step 7: Copy Behavior to Bullet​

  1. Go to Bullet Behavior:
    • Copy the behavior from the wood to the bullet to ensure it can also deal damage to the enemy.

Step 8: Add Protection to Enemy​

  1. Open Enemy Behavior:
    • Define a boolean variable named Initialized with a default value of false in the Variable Panel.

  1. Delay Initialization:
    • Drag the following nodes:
      • Wait For node (from Flow Control section) and set it to 2 seconds.
      • Set Boolean node (from Variable section) to change Initialized to true.

Step 9: Update Take Damage Action​

  1. Modify Take Damage Action:
    • Drag a Branch node (from Flow Control section) and a Get Boolean node (from Variable section) into the Take Damage action.
    • Use these to check if Initialized is true before processing damage.

Step 10: Create Win Message​

  1. Open the Asset Panel:
    • Spawn a Text object.
  2. Set Text Attributes:
    • Change the text to Congratulations
    • Disable it in Play mode.

  1. Go to Text Behavior:
    • Create a Action Show Text and drag the following nodes:
      • Show node (from Effect section).

Step 11: Pop out Message​

  1. Modify Take Damage Action in Enemy Behaviour:
    • Drag the following nodes to check if HP is 0:
      • Branch node (from Flow Control section)
      • Get Number node (from Variable section)
      • Compare node (from Math section)
    • Call the Show Text action if HP is 0:
      • Drag the Call Action node (from Flow Control section)

Conclusion​

Congratulations! You've successfully created the enemy and building mechanics for the Animal Buster game. You can now interact with these elements in the game scene. Stay tuned for more tutorials!