Question

View the following C# Script carefully. Assume that the Script is enabled, is attached to an active GameObject, and addresses the appropriate namespaces first.

1. Discuss when and how often during the game the Update() function will be executed.
2. Discuss each line (from line 9 to 17, excluding the lines with curly brackets) to detail what the code inside the update function is doing.
   Be sure to outline how the variables are being used during your discussion.

1 public class Player : MonoBehaviour
2 {
3    public GameObject coinPrefab;
4 private GameObject coin;
5    public Transform spawnpoint;
6  
7    void Update()
8    {
9       if (Input.GetMouseButtonDown(0))
10       {
11          Instantiate(coinPrefab, spawnpoint.position, spawnpoint.rotation);
12       }
13       if (Input.GetMouseButtonDown(1))
14       {
15          coin =  GameObject.FindWithTag("Coin");
16          Destroy(coin);
17       }
18    }
19 }

Answer 1

the Update() function is called once for each frame. We use Time.deltaTime to calculate time difference between 2 update calls

I've added comments above each line for explanation

1 public class Player : MonoBehaviour
2 {
3 public GameObject coinPrefab;
4 private GameObject coin;
5 public Transform spawnpoint;
6
7 void Update()
8 {
//if primary button of mouse is pressed (primary button is left click)
9 if (Input.GetMouseButtonDown(0))
10 {
// create a clone of coinPrefab at specific position(spawnpoint.position) and specific angle(spawnpoint.rotation)
11 Instantiate(coinPrefab, spawnpoint.position, spawnpoint.rotation);
12 }
//if secondary mouse button is pressed (right click)
13 if (Input.GetMouseButtonDown(1))
14 {
// returns a game object which is tagged "Coin" and store it in variable coin. If none found, it returns null
15 coin = GameObject.FindWithTag("Coin");
//Destroy the coin object retrieved in previous line
16 Destroy(coin);
17 }
18 }
19 }