CODEWITHSUNDEEP
c#unity-game-engine
Umar Rahim
Umar Rahim

Reputation: 45

Unity2D Platformer: Player needs a key before using Door

I am new to C# and been trying to make a 2D platformer game by learning specifically what I need. I am kinda stuck atm.

I have tagged the Door with "Next" and programmed the player to enter "level 2" scene when it collides with anything tagged with "Next".

I want the player to obtain a Key before this script can take effect, and i have no idea how to code it.

I know this isn't the most optimal code, but this is what I used to make the game load next level

private void OnTriggerEnter2D(Collider2D other)
    
if (other.gameObject.CompareTag("Next"))
     { SceneManager.LoadScene("Level 2");}

Help will be much appreciated.

Upvotes: 0

Views: 432

Answers (1)

IndieGameDev
IndieGameDev

Reputation: 2974

You can add a boolean called bool key = false; and then set it to true the moment you pick up the key.

Key PickUp (lies on Player GameObject)

private void OnTriggerEnter2D(Collider2D other) {
    if (other.gameObject.CompareTag("Key")){
        // Key has been collected
        key = true;
        // Destroy Key after we've collected it
        Destroy(other.gameObject);
    }
}

When you've done that you can just ask if the player has a key when he enters the door, if he doesn't have a key he can't enter.

Door Enter Example (lies on Player GameObject)

private void OnTriggerEnter2D(Collider2D other) {
    // Checking if Player Entered the Door Trigger and if he collected a key
    if (other.gameObject.CompareTag("Next") && key) {
        // Key was "used"
        key = false;
        // Load Scene next in the BuildIndex Order
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);
    }
}

To use the the Code shown above you would need to make the Key a GameObject with a Collider that has IsTrigger set to Active. As well as adding both Code parts into your Player Script where you are already detecting the Collision right now.

Upvotes: 3

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