IEnumerator WaveSpawnRoutine()
{
yield return(new WaitForSeconds(_timeBetweenWaves));
_UIManager.OnStartNewWave(_waveNumber); // tell the UI so it can display wave number on screen
_allWaveEnemiesAreCreated = false;
_aliveEnemies.Clear();
// get number of enemies
int numberOfEnemies = _firstWaveNumberEnemies + _moreEnemiesPerWave * (_waveNumber - 1);
int enemiesCreatedSoFar = 0;
WaitForSeconds timeBetweenEnemies = new WaitForSeconds(_durationOfEntireWave / (float)numberOfEnemies);
while (!_stopSpawning && !_allWaveEnemiesAreCreated)
{
yield return(timeBetweenEnemies);
// spawn an enemy
GameObject newEnemy = ChooseWeightedItem(_enemyTypes);
newEnemy = Instantiate(newEnemy);
newEnemy.transform.parent = _enemyContainer.transform;
// add enemy to list
_aliveEnemies.Add(newEnemy);
if (++enemiesCreatedSoFar >= numberOfEnemies)
{
_allWaveEnemiesAreCreated = true;
}
// chance to add shields to enemies
float shieldRandom = Random.Range(0f, 1f);
if (shieldRandom < _shieldedEnemyChance)
{
EnemyLives lifeComponent = newEnemy.GetComponent <EnemyLives>();
lifeComponent.ToggleShields(true);
}
}
}
void Start()
{
enemyLives = GetComponent <EnemyLives>();
_myBehavior = GetComponent <EnemyBehavior>();
if (!_myBehavior)
{
Debug.LogError(this + " an enemy doesn't have a behavior script.");
}
}