Apply Bonemeal Effect Programmatically?

On my server, I have an issue where there's not enough grass around - too many new players, so we run out of grass and starting a wheat field becomes difficult.

I want to programmatically apply the bonemeal effect to a grass block to grow tall grass and flowers, but I'm searching the forums and JavaDocs and nothing jumps out at me. How can I do this?

 

Dunno if this is exactly what you are looking for, but this should do the trick, although i didn't test it

Code:

    private void regrow(Block center, int radius){
        Random rnd = new Random();
        int radius_squared = radius * radius;
        Block toHandle;
        for (int x = -radius; x <= radius; x++) {
            for (int z = -radius; z <= radius; z++) {
                toHandle =  center.getWorld().getHighestBlockAt(center.getX() + x, center.getZ() + z);
                if (toHandle.getRelative(BlockFace.DOWN).getType() == Material.GRASS) { // Block beneath is grass
                    if (center.getLocation().distanceSquared(toHandle.getLocation()) <= radius_squared) { // Block is in radius
                        if (rnd.nextInt(100) < 66) {    // Random chance
                            toHandle.setType(Material.LONG_GRASS);
                            toHandle.setData((byte) 1);
                        }
                    }
                }
            }
        }
    }

 

Thanks, I can see how this would work for now, but I'd rather apply the bonemeal effect and just let MC do the rest, in case bonemeal's impact changes in the future.

Can I maybe fake a bonemeal event somehow?

 

Yes, you can call into the bone meal "use item" method directly. This is what I use in EnchantMore for the Hoe + Respiration = grow effect:

Code:

    // Attempt to grow organic structure
    private void growStructure(Location loc, Player player) {
        int x = loc.getBlockX(), y = loc.getBlockY(), z = loc.getBlockZ();
        World world = loc.getWorld();

        // Use bonemeal (white dye/ink) to grow
        CraftItemStack bonemealStack = (new CraftItemStack(Material.INK_SACK, 1, (short)15));

        // 'a' unobfuscated = onItemUse
        net.minecraft.server.Item.INK_SACK.a(bonemealStack.getHandle(), ((CraftPlayer)player).getHandle(), ((CraftWorld)world).getHandle(), x, y, z, 0/*unused*/);
    }

It works on at least CraftBukkit 1.1-R4, but will have to be updated for 1.2 to use the new obfuscated onItemUse method name (anyone know what it is? I haven't updated this plugin for 1.2R0.1 yet). Or maybe there is a better, less fragile way to do this, anyone know?

 

Anyone trying to update their plugin for 1.1-R8+, the obfuscated "a" method is now named "interactWith":

Code:

        net.minecraft.server.Item.INK_SACK.interactWith(bonemealStack.getHandle(), ((CraftPlayer)player).getHandle(), ((CraftWorld)world).getHandle(), x, y, z, 0/*unused*/);