Trap player in blocks

Hi!

I'm currently developing a MMO-plugin and most of it is doing good.

I have a ice wand which is supposed to freeze players when they are hit, but i don't really know where to start. I believe i need a for-loop and loop through every block around the player, but my math is really, really terrible.

I only need the for-loop, as saving the blocks to a hashmap is no problem.

Are there any snippets anyone wants to share?

Thanks

 

This returns a cube around a location. Have fun

Code:java

public static Location[] getCube(Location l, int rad) {
        HashSet<Location> list = new HashSet<Location>();
        for (int i = -rad; i <= rad; i++) {
            for (int y = -rad; y <= rad; y++) {
                list.add(l.clone().add(-rad, y, i));
                list.add(l.clone().add(rad, y, i));
                list.add(l.clone().add(y, -rad, i));
                list.add(l.clone().add(y, rad, i));
                list.add(l.clone().add(i, y, -rad));
                list.add(l.clone().add(i, y, rad));
            }
        }
        return list.toArray(new Location[list.size()]);
    }

You'll need to use the block.setType(Material) method, and a delayed task for setting the type back to the original.