IEnumerator ModifyMovementSpeed(EnemyMovementInfo info)
{
int targetId = info.entityID;
EnemyEntityView entityView = null;
// I dont feel like this is a good solution, but I'm not sure how else I can know when the entities have
// finnished building.
while (entityView == null)
{
yield return(null);
entityViewsDB.TryQueryEntityView(targetId, out entityView);
}
entityView.movementComponent.moveSpeed += info.movementSpeed;
}
public void Step(ref EnemyMovementInfo token, int condition)
{
ModifyMovementSpeed(token).Run();
}
IEnumerator IntervaledTick()
{
//OK this is of fundamental importance: Never create implementors as Monobehaviour just to hold
//data. Data should always been retrieved through a service layer regardless the data source.
//The benefit are numerous, including the fact that changing data source would require
//only changing the service code. In this simple example I am not using a Service Layer
//but you can see the point.
//Also note that I am loading the data only once per application run, outside the
//main loop. You can always exploit this trick when you now that the data you need
//to use will never change
var enemiestoSpawn = ReadEnemySpawningDataServiceRequest();
while (!levelFinnished)
{
//Svelto.Tasks allows to yield UnityYield instructions but this comes with a performance hit
//so the fastest solution is always to use custom enumerators. To be honest the hit is minimal
//but it's better to not abuse it.
yield return(_waitForSecondsEnumerator);
if (waveNumberOfEnemies == _numberOfEnemyKilled)
{
wave++;
if (lastwave)
{
levelFinnished = true;
}
enemyWaveSequence.Next(this, ref wave);
yield return(_wavewaitForSecondsEnumerator);
foreach (var spawnData in enemiestoSpawn)
{
// The spawn time becomes normale spawntime + wavemodiefier times wave-1(wave-1 so the first wave is not
//affected by the modiefier).
float newSpawnTime = spawnData.spawnTime + (spawnData.waveSpawnModiefier * (wave - 1));
// make sure the spawntime is always higher then 0
if (newSpawnTime > 0)
{
spawnData.spawnTime = spawnData.timeLeft = newSpawnTime;
}
else
{
spawnData.spawnTime = spawnData.timeLeft = 1;
}
}
}
if (enemiestoSpawn != null)
{
for (int i = enemiestoSpawn.Length - 1; i >= 0 && _numberOfEnemyToSpawn > 0; --i)
{
var spawnData = enemiestoSpawn[i];
if (spawnData.timeLeft <= 0.0f)
{
// Find a random index between zero and one less than the number of spawn points.
int spawnPointIndex = Random.Range(0, spawnData.spawnPoints.Length);
// Create an instance of the enemy prefab at the randomly selected spawn point position and rotation.
var go = _gameobjectFactory.Build(spawnData.enemyPrefab);
//I have been lazy here and retrieving the data directly from the Monobehaviour
//but still I am not creating an implementor for the purpose!
var data = go.GetComponent <EnemyAttackDataHolder>();
//we are going to use a mix of implementors as Monobehaviours and
//normal implementors here:
List <IImplementor> implementors = new List <IImplementor>();
go.GetComponentsInChildren(implementors);
implementors.Add(new EnemyAttackImplementor(data.timeBetweenAttacks, data.attackDamage));
//In this example every kind of enemy generates the same list of EntityViews
//therefore I always use the same EntityDescriptor. However if the
//different enemies had to create different EntityViews for different
//engines, this would have been a good example where EntityDescriptorHolder
//could have been used to exploit the the kind of polymorphism explained
//in my articles.
_entityFactory.BuildEntity <EnemyEntityDescriptor>(
go.GetInstanceID(), implementors.ToArray());
var transform = go.transform;
var spawnInfo = spawnData.spawnPoints[spawnPointIndex];
transform.position = spawnInfo.position;
transform.rotation = spawnInfo.rotation;
spawnData.timeLeft = spawnData.spawnTime;
EnemyMovementInfo movementInfo = new EnemyMovementInfo(enemySpeedPercentageGain, go.GetInstanceID());
enemySpawnSequence.Next(this, ref movementInfo);
_numberOfEnemyToSpawn--;
}
spawnData.timeLeft -= 1.0f;
}
}
}
}
