/**
* When a creeper explodes, reinforcements are launched from him with random velocities by this
* method.
*
* <p>Reinforcements are always launched at a 45 degree angle, a configurable range from the
* exploding creeper.
*
* @param creeper the exploding creeper.
*/
protected void launchReinforcements(Entity creeper) {
final int numReinforcements = random(CONFIG.MIN_REINFORCEMENTS, CONFIG.MAX_REINFORCEMENTS);
for (int i = 0; i < numReinforcements; ++i) {
// Compute unit velocity vector components, given 45 degree pitch.
double yaw = 2.0 * Math.PI * Math.random();
double y = INV_ROOT_2;
double x = INV_ROOT_2 * Math.cos(yaw);
double z = INV_ROOT_2 * Math.sin(yaw);
// Spawn one reinforcement.
Location origin = creeper.getLocation();
World world = origin.getWorld();
Location loc =
origin.clone().add(CONFIG.REINFORCEMENT_RANGE * x, 0.5, CONFIG.REINFORCEMENT_RANGE * z);
Creeper reinforcement = (Creeper) world.spawnEntity(loc, EntityType.CREEPER);
if (reinforcement != null) {
reinforcement.setMetadata(SPECIAL_KEY, SPECIAL_META);
double speed = random(CONFIG.MIN_REINFORCEMENT_SPEED, CONFIG.MAX_REINFORCEMENT_SPEED);
Vector velocity = new Vector(speed * x, speed * y, speed * z);
reinforcement.setVelocity(velocity);
// Randomly charge a fraction of creepers.
if (Math.random() < CONFIG.CHARGED_CHANCE) {
reinforcement.setPowered(true);
}
}
}
} // launchReinforcements
/** Replace naturally spawned monsters in the affected world with creepers. */
@EventHandler(ignoreCancelled = true)
public void onCreatureSpawn(CreatureSpawnEvent event) {
if (!CONFIG.isAffectedWorld(event)
|| event.getSpawnReason() != SpawnReason.NATURAL
|| !isEligibleHostileMob(event.getEntityType())) {
return;
}
Entity originalMob = event.getEntity();
Creeper creeper;
if (event.getEntityType() == EntityType.CREEPER) {
creeper = (Creeper) originalMob;
} else {
Location loc = originalMob.getLocation();
creeper = (Creeper) loc.getWorld().spawnEntity(loc, EntityType.CREEPER);
originalMob.remove();
}
creeper.setMetadata(SPECIAL_KEY, SPECIAL_META);
if (Math.random() < CONFIG.CHARGED_CHANCE) {
creeper.setPowered(true);
}
} // onCreatureSpawn