[Challenge 4] Soccer Scripting

0. Fix error before we start challenge

Original EnemyX.cs

void Update()
{
  enemyRb = GetComponent<Rigidbody>();
}

Modified EnemyX. cs

void Update()
{
  enemyRb = GetComponent<Rigidbody>();
  playerGoal = GameObject.Find("Player");
}

1. Hitting an enemy sends it back towards you

• When you hit an enemy, it should send it away from the player

Original PlayerControllerX.cs

private void OnCollisionEnter(Collision other)
{
  if (other.gameObject.CompareTag("Enemy"))
  {
    Rigidbody enemyRigidbody = other.gameObject.GetComponent<Rigidbody>();
    Vector3 awayFromPlayer =  transform.position - other.gameObject.transform.position; 
     ...
  }
}

Modified Script

private void OnCollisionEnter(Collision other)
{
  if (other.gameObject.CompareTag("Enemy"))
  {
    Rigidbody enemyRigidbody = other.gameObject.GetComponent<Rigidbody>();
    Vector3 awayFromPlayer =  other.gameObject.transform.position - transform.position; 
     ...
  }
}

2. A new wave spawns when the player gets a powerup

• A new wave should spawn when all enemy balls have been removed

Original SpawnManagerX.cs

void Update()
{
  enemyCount = GameObject.FindGameObjectsWithTag("Powerup").Length;
  ...
}

Modified Script

void Update()
{
  enemyCount = GameObject.FindGameObjectsWithTag("Enemy").Length;
  ...
}

3. The powerup never goes away

• The powerup should only last for a certain duration, then disappear

Original PlayerControllerX.cs

private void OnTriggerEnter(Collider other)
{
  if (other.gameObject.CompareTag("Powerup"))
  {
    Destroy(other.gameObject);
    hasPowerup = true;
    powerupIndicator.SetActive(true);
  }
}

Modified Script

private void OnTriggerEnter(Collider other)
{
  if (other.gameObject.CompareTag("Powerup"))
  {
    Destroy(other.gameObject);
    hasPowerup = true;
    powerupIndicator.SetActive(true);
    StartCoroutine(PowerupCooldown());
  }
}

4. 2 enemies are spawned in every wave

• One enemy should be spawned in wave 1, two in wave 2, three in wave 3, etc

Original SpawnManagerX.cs

void SpawnEnemyWave(int enemiesToSpawn)
{
  ...
  // Spawn number of enemy balls based on wave number
  for (int i = 0; i < 2; i++)
  {
    Instantiate(enemyPrefab, GenerateSpawnPosition(), enemyPrefab.transform.rotation);
  }
  ...
}

Modified Script

void SpawnEnemyWave(int enemiesToSpawn)
{
  ...
  // Spawn number of enemy balls based on wave number
  for (int i = 0; i < enemiesToSpawn; i++)
  {
    Instantiate(enemyPrefab, GenerateSpawnPosition(), enemyPrefab.transform.rotation);
  }
  ...
}

5. The enemy balls are not moving anywhere

• The enemy balls should go towards the “Player Goal” object

Original EnemyX.cs

public float speed;

Modified Script

private float speed = 20.0f;

6. Bonus: The player needs a turbo boost

• The player should get a speed boost whenever the player presses spacebar - and a particle effect should appear when they use it

Original PlayerControllerX.cs

void Update()
{
  // Add force to player in direction of the focal point (and camera)
  float verticalInput = Input.GetAxis("Vertical");

  playerRb.AddForce(focalPoint.transform.forward * verticalInput * speed * Time.deltaTime); 

  // Set powerup indicator position to beneath player
  powerupIndicator.transform.position = transform.position + new Vector3(0, -0.6f, 0);
}

Modified Script

void Update()
{
  // Add force to player in direction of the focal point (and camera)
  float verticalInput = Input.GetAxis("Vertical");

  if (Input.GetKey(KeyCode.Space))
  {
    speed = 800;
    smokeParticle.Play();
  } else
  {
    speed = 500;
    smokeParticle.Stop();
  }

  playerRb.AddForce(focalPoint.transform.forward * verticalInput * speed * Time.deltaTime); 

  // Set powerup indicator position to beneath player
  powerupIndicator.transform.position = transform.position + new Vector3(0, -0.6f, 0);
}

Hierarchy

7. Bonus: The enemies never get more difficult

• The enemies’ speed should increase in speed by a small amount with every new wave

Modified Enemy.cs

...
private SpawnManagerX smScript;

void Start()
{
  ...
  smScript = GameObject.Find("Spawn Manager").GetComponent<SpawnManagerX>();
}

void Update()
{
  // Set enemy direction towards player goal and move there
  Vector3 lookDirection = (playerGoal.transform.position - transform.position).normalized;
  enemyRb.AddForce(lookDirection * speed * Time.deltaTime);

  if (smScript.enemyCount == 0)
  {
    speed += 10.0f;
  }
}