public static void DestroyOnExplosionAndRevealPowerUp(EntityManager em, int entityLiveId, uint message, ref MessageData data)
{
// TODO: There is a bug where two power ups can appear in the same spot if that block is hit by
// two explosions in the same update cycle. We need to check if the block is on the delete list (since
// we delay deletion). An alternative is that we could just remove the handler?
Debug.Assert(message == Messages.HitByInitialExplosion);
em.DelayFreeByLiveId(entityLiveId, EntityFreeOptions.Deep);
if (random.NextDouble() < GameConstants.PowerUpChance)
{
// Choose based on weights
float totalWeight = 0f;
foreach (PowerUpProbabilities pup in powerUpTemplates)
{
totalWeight += pup.Probability;
}
float choice = (float)random.NextDouble();
string template = null;
float accWeight = 0f;
foreach (PowerUpProbabilities pup in powerUpTemplates)
{
accWeight += pup.Probability;
if (choice <= (accWeight / totalWeight))
{
template = pup.TemplateName;
break;
}
}
Entity entityPowerUp = em.AllocateForGeneratedContent(template, Universe.TopLevelGroupUniqueIdBase);
Helpers.TransferPlacement(em, entityLiveId, entityPowerUp.LiveId);
// Depending on our game settings, power ups may or may not be affected by explosions
if (true) // For now we'll always assume they are
{
bool allocatedNew;
MessageHandler messageHandler = (MessageHandler)em.AddComponentToEntity(entityPowerUp, ComponentTypeIds.MessageHandler, out allocatedNew);
messageHandler.Add(new MessageAndHandler(Messages.HitByInitialExplosion, "SimplyDestroy".CRC32Hash()));
}
}
data.Handled = true;
}
