//function call to spawn a subwave
IEnumerator SpawnSubWave(Wave wave, int subWaveIdx)
{
SubWave subWave = wave.subWaveList[subWaveIdx];
TDSArea sArea = subWave.spawnArea != null ? subWave.spawnArea : spawnAreaList[0]; //use the default spawn area if nothing has been assigned for the subwave
//wait for start delay
yield return(new WaitForSeconds(subWave.startDelay));
if (subWave.unitPrefab != null)
{
for (int i = 0; i < subWave.count; i++)
{
//wait for the spawn cooldown
if (i > 0)
{
yield return(new WaitForSeconds(subWave.interval));
}
Quaternion rot = !randomRotation?sArea.GetRotation() : Quaternion.Euler(0, Random.Range(0, 360), 0);
UnitAI unitInstance = SpawnUnit(subWave.unitPrefab.gameObject, sArea.GetPosition(), rot, subWave.unitPrefab.gameObject.name + "_" + spawnCount);
unitInstance.SetWaveID(this, wave.waveID); //assign the unit with the waveID so they know they belong to a wave (unit with valid waveID will call UnitCleared() callback)
wave.activeUnitCount += 1;
}
}
//increase the subWaveSpawned counter
wave.subWaveSpawned += 1;
yield return(null);
}
IEnumerator SpawnRoutine()
{
yield return(new WaitForSeconds(startDelay));
//keep on looping
while (true)
{
Collectible newObj = SpawnItem(spawnArea.GetPosition());
if (newObj != null)
{
newObj.SetTriggerCallback(this.ItemTriggeredCallback); //set callback function for the collectible (which clear the item in existingItemList)
existingItemList.Add(newObj); //add the new item to existingItemList
}
//wait for spawnCD before attempting next spawn
yield return(new WaitForSeconds(spawnCD));
}
}
