4.2 Controlling Movement with Rigidbody

Physics-based movement uses Rigidbody forces for realism. Let’s implement this with a jump mechanic.

Step 1: Set Up a Jump Script
Create a script called PlayerMovement and attach it to your cube (or another object). Add the following code:

public float jumpForce = 5f;  // Strength of the jump
private Rigidbody rb;

void Start() {
    rb = GetComponent<Rigidbody>();
}

void Update() {
    if (Input.GetKeyDown(KeyCode.Space)) {
        rb.AddForce(Vector3.up * jumpForce, ForceMode.Impulse);
    }
}

Explanation:

• Input.GetKeyDown: Detects when the spacebar is pressed.
• AddForce: Applies an upward force to simulate a jump.
• ForceMode.Impulse: Applies the force instantly.

Step 2: Test It

1. Save the script and press Play.
2. Press the spacebar to make the object jump.