public void Clear()
{
_timer.Close();
_activeCircles.Clear();
_collisionsDetector = null;
_circleSpawner = null;
_circleDestroyer = null;
GC.Collect();
}
private void Init(Circle[] unspawnedCircles, Circle[] spawnedCircles, Settings settings)
{
Settings = settings;
_activeCircles = new List <Circle>(spawnedCircles.Length + unspawnedCircles.Length);
var size = new Vector2(settings.GameAreaWidth, settings.GameAreaHeight);
CalculateSimulationRate(settings.MaxUnitSpeed, settings.MinUnitRadius);
int elapsedTime = IterationsCount * DeltaTime();
_circleSpawner = new CirclesSpawner(unspawnedCircles, spawnedCircles, settings.UnitSpawnDelay, _activeCircles, elapsedTime);
_circleDestroyer = new CirclesDestroyer(_activeCircles);
_collisionsDetector = new CollisionsDetector(settings.NumUnitsToSpawn, size);
}