4.4 Implementing Gravity and Fall Detection

Unity applies gravity automatically to Rigidbodies. Let’s expand on this to detect when an object falls off the playable area.

Step 1: Create a Fall Detection Script
Attach the following script to your player object:

void Update() {
    if (transform.position.y < -10) {
        Debug.Log("Player has fallen!");
    }
}

Explanation:

• The script checks the player’s vertical position.
• If the position drops below a certain threshold, it triggers a message (or can reset the position).

Step 2: Reset Player Position
Modify the script to reset the player’s position:

void Update() {
    if (transform.position.y < -10) {
        transform.position = new Vector3(0, 2, 0);  // Reset to starting point
    }
}

Test It: Move your object off the platform and watch it reset when it falls.