Create a wall of glass around your Minecraft creations by simply running your Python program.

What you’ll learn:

• how to construct large Minecraft objects by coding
• how to request user input from the python console to change your program
• how to use an if statement

Nothing’s worse than when you’ve spent hours building something amazing in Minecraft, only for someone to come along and grief your creation. With this program, you’ll be able to throw up a ‘force field’ made of glass all around your base at the touch of a button. For this exercise, we’ll need the exact coordinates for the perimeter of our house, so we’ll start with a program that can determine our location in Minecraft.

# Force Field!
# Create a glass wall around your creation to protect it from griefers.
# Jim Christian
# CodinginMinecraft.com

# Import the Minecraft API
import mcpi.minecraft as minecraft
import mcpi.block as block
import time

def liveCompass():
    #create a connection to the Minecraft game
    mc = minecraft.Minecraft.create()
    # set a variable for the player's position
    pos = mc.player.getPos()
    pos = minecraft.Vec3(int(pos.x), int(pos.y), int(pos.z))
    time.sleep(5)
    print(pos)
    mc.postToChat("I'm currently at x: " + str(pos.x) + " y: " + str(pos.y) + " z: " + str(pos.z))

def shieldsUp():
    # create a connection to the Minecraft game
    mc = minecraft.Minecraft.create()
    forcex1 = 7
    forcex2 = 83
    forcez1 = -141
    forcez2 = -230
    forcey = -1
    height = 20
    field = block.GLASS.id

    # Set surrounding blocks to same value, with a 1m gap made out of glass
    mc.setBlocks(forcex1, forcey, forcez1, forcex2, forcey + height, forcez1, field)
    mc.setBlocks(forcex2, forcey, forcez1, forcex2, forcey + height, forcez2, field)
    mc.setBlocks(forcex2, forcey, forcez2, forcex1, forcey + height, forcez2, field)
    mc.setBlocks(forcex1, forcey, forcez1, forcex1, forcey + height, forcez2, field)

def shieldsDown():
    # create a connection to the Minecraft game
    mc = minecraft.Minecraft.create()
    forcex1 = 7
    forcex2 = 83
    forcez1 = -141
    forcez2 = -230
    forcey = -1
    height = 20
    field = block.AIR.id

    # Set surrounding blocks to same value, with a 1m gap made out of glass
    mc.setBlocks(forcex1, forcey, forcez1, forcex2, forcey + height, forcez1, field)
    mc.setBlocks(forcex2, forcey, forcez1, forcex2, forcey + height, forcez2, field)
    mc.setBlocks(forcex2, forcey, forcez2, forcex1, forcey + height, forcez2, field)
    mc.setBlocks(forcex1, forcey, forcez1, forcex1, forcey + height, forcez2, field)    

# True is *always* True. So therefore the following code will run until it is terminated.
while True:
    if raw_input() == "up":
        print("Shields up!")
        shieldsUp()
    if raw_input() == "down":
        print("Shields down!")
        shieldsDown()