Spawning a falling block at random coords?

So far, I have this:

Code:

World map = Bukkit.getWorld("world");
                   
                    double x = generator.nextDouble()*50-20;
                    double y = 220;
                    double z = generator.nextDouble()*50-20;
                       
                    Location objspawn = new Location(map,x,y,z);
                       
                    FallingBlock objective = map.spawnFallingBlock(objspawn, Material.CHEST, (byte) 0);
                    objective.setVelocity(new Vector(x, y, z));
                       
                    Bukkit.broadcastMessage("The chest has spawned at " + x + "," + y + "," + z);

What it does as of now is broadcasts the random coords, but doesn't spawn anything at them. Also, it gives a nasty random number like 172.2029182349. Anybody have a solution to that? I want it to print like so: X: 172 Y: 255 Z: 850

 

Johnzeh





(int)Math.round(x) - That rounds it to the nearest whole number. I think that should work.

 

Ah yes thanks! Now, any ideas for spawning a falling block?

 

Not sure :/

 

Code:

World world = Bukkit.getWorld("world");
                 
int x = (int) Math.round(generator.nextDouble() * 50 - 25);
int y = 220;
int z = (int) Math.round(generator.nextDouble() * 50 - 25);
Location pos = new Location(world, x, y, z);

FallingBlock objective = map.spawnFallingBlock(pos, Material.CHEST, (byte) 0);
 
Bukkit.broadcastMessage("The chest has spawned at " + x + "," + y + "," + z);

Untested, but it should work.

 

socram8888
That's exactly the same or close to what I have. What I have right now does everything but spawn the falling chest. Here's a update of the code:

Code:

World map = Bukkit.getWorld("world");
                   
                    double x = generator.nextDouble()*5000;
                    double y = 220;
                    double z = generator.nextDouble()*5000;
                   
                    x = Math.round(x);
                    y = Math.round(y);
                    z = Math.round(z);
                   
                    Location objspawn = new Location(map,x,y,z);
                       
                    FallingBlock objective = map.spawnFallingBlock(objspawn, Material.BEDROCK, (byte) 0);
                   
                    objective.setVelocity(new Vector(x,y,z));
                   
                    Bukkit.broadcastMessage(ChatColor.AQUA + "The objective has spawned at X: " + x + ", Y: " + y + ", Z: " + z);

 

Floats are a bit nasty. When for example adding 1 + 1, they might not return 2, but rather 1.999999, and blocks can be spawned at 2, but not at 1.9999999. I recommend trying to modify your code to create a Location using integers rather than floats.

 

I have it so that it will round the coords so it should always return a real number.

So, does anyone else have any ideas as to why the falling block doesn't spawn?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Why are you setting the velocity to the coordinates?

Code:

objective.setVelocity(new Vector(x,y,z));

That would cause the falling block to fly off at enormous speeds (depending on coordinate though).

Spawning a falling block right above the player seems to work just fine:

Code:java

@Override
public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
    if (sender instanceof Player) {
        Player player = (Player) sender;
        spawnFalling(player.getWorld(), player.getLocation().add(0, 120, 0));
    }
    return true;
}
 
private void spawnFalling(World world, Location location) {
    world.spawnFallingBlock(location, Material.BEDROCK, (byte) 0);
}

Unfortunately, if you spawn this block at a random location not yet generated (or perhaps loaded), the entity is simply lost:

Code:java

@Override
public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
    if (sender instanceof Player) {
        Player player = (Player) sender;
        Random rnd = new Random();
 
        spawnFalling(new Location(player.getWorld(), 
                rnd.nextDouble() * 5000, 220, rnd.nextDouble() * 5000));
    }
    return true;
}
 
private void spawnFalling(Location location) {
    location.getWorld().spawnFallingBlock(location, Material.BEDROCK, (byte) 0);
    Bukkit.broadcastMessage(ChatColor.AQUA + "The objective has spawned at " + location);
}

Instead, just create the chest manually by getting the highest non-air block and setting the block above to a chest:

Code:java

@Override
public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
    if (sender instanceof Player) {
        Player player = (Player) sender;
        Random rnd = new Random();
 
        createChest(player.getWorld(), (int) (rnd.nextDouble() * 5000), (int) (rnd.nextDouble() * 5000));
    }
    return true;
}
 
private void createChest(World world, int x, int z) {
    int y = world.getHighestBlockYAt(x, z);
 
    // And so on
    world.getBlockAt(x, y + 1, z).setType(Material.CHEST);
    Bukkit.broadcastMessage(ChatColor.AQUA + "Created chest at " + x + ", " + z);
}

That seems to work fine.

Maybe it would be nice to have a falling animation, but players are unlikely to catch it until it lands anyway. And you can always keep track of the spawned location until the chunk has been loaded and generated, and only then spawn the falling block.