Fancier Minecraft Pi Game of Life

IMG_20130218_012053.jpg

I spiffed up my last bit of Minecraft Pi Edition code by making the Game of Life fit into a smaller area of the world, making the world grid and live cells easier to see (by making dead cells Obsidian and live cells Diamond Blocks), and even adding a nifty little stepped wall around the playing field. In the two photos, you can see the new Game of Life as seen from the ground inside of the playing field and hovering above it. It runs a fair amount faster now that it's only updating a 64x64 grid. Still not going to break any speed records (even from 1980) but it's a bit more fun to play with now.

IMG_20130218_011949.jpg

 

# pilife.py
#
# Jason Milldrum
# 18 Feb 2013
#
# www.nt7s.com/blog

import minecraft.minecraft as minecraft
import minecraft.block as block
import numpy
import random

mc = minecraft.Minecraft.create()

# World size in x and z axes
#worldSize = 64

# Bounds of x and z axes
negLimit = -32
posLimit = 31

# Bounds of y axis
yNegLimit = -64
yPosLimit = 64

# Y coord of Life world floor
worldFloor = 0

# Number of steps in the surrounding wall
maxWallHeight = 5

# Initialize the Life world
theWorld = numpy.zeros((posLimit - negLimit + 1, posLimit - negLimit + 1), dtype=numpy.bool)
theNextWorld = numpy.zeros((posLimit - negLimit + 1, posLimit - negLimit + 1), dtype=numpy.bool)
for x in range(posLimit - negLimit):
	for y in range(posLimit - negLimit):
		theWorld[x][y] = random.randint(0,1)

# Clear everything at the world surface and above inside the Life play area
mc.setBlocks(negLimit - (maxWallHeight * 2), worldFloor, negLimit - (maxWallHeight * 2), posLimit + (maxWallHeight * 2) - 1, yPosLimit, posLimit + (maxWallHeight * 2) - 1, block.AIR)

# Let's create stairsteps around the Life world

# Start with the +x direction
x = posLimit
stepHeight = worldFloor
# Up
while stepHeight <= maxWallHeight:
	mc.setBlocks(x, worldFloor, negLimit - stepHeight - 1, x, stepHeight, posLimit + stepHeight, block.BEDROCK)
	x += 1
	stepHeight += 1
# Down
stepHeight = maxWallHeight
while stepHeight >= worldFloor:
	mc.setBlocks(x, worldFloor, negLimit - stepHeight - 1, x, stepHeight, posLimit + stepHeight, block.BEDROCK)
	x += 1
	stepHeight -= 1

# Now the -x direction
x = negLimit - 1
stepHeight = worldFloor
# Up
while stepHeight <= maxWallHeight:
	mc.setBlocks(x, worldFloor, negLimit - stepHeight - 1, x, stepHeight, posLimit + stepHeight, block.BEDROCK)
	x -= 1
	stepHeight += 1
# Down
stepHeight = maxWallHeight
while stepHeight >= worldFloor:
	mc.setBlocks(x, worldFloor, negLimit - stepHeight - 1, x, stepHeight, posLimit + stepHeight, block.BEDROCK)
	x -= 1
	stepHeight -= 1

# Next the +z direction
z = posLimit
stepHeight = worldFloor
# Up
while stepHeight <= maxWallHeight:
	mc.setBlocks(negLimit - stepHeight - 1, worldFloor, z, posLimit + stepHeight, stepHeight, z, block.BEDROCK)
	z += 1
	stepHeight += 1
# Down
stepHeight = maxWallHeight
while stepHeight >= worldFloor:
	mc.setBlocks(negLimit - stepHeight - 1, worldFloor, z, posLimit + stepHeight, stepHeight, z, block.BEDROCK)
	z += 1
	stepHeight -= 1

# Finally the -z direction
z = negLimit - 1
stepHeight = worldFloor
# Up
while stepHeight <= maxWallHeight:
	mc.setBlocks(negLimit - stepHeight - 1, worldFloor, z, posLimit + stepHeight, stepHeight, z, block.BEDROCK)
	z -= 1
	stepHeight += 1
# Down
stepHeight = maxWallHeight
while stepHeight >= worldFloor:
	mc.setBlocks(negLimit - stepHeight - 1, worldFloor, z, posLimit + stepHeight, stepHeight, z, block.BEDROCK)
	z -= 1
	stepHeight -= 1

# Set the player right in the middle of the world
mc.player.setPos(0, worldFloor, 0)

# Main processing loop
while True:
	# Display theWorld
	for x in range(posLimit - negLimit):
		for y in range(posLimit - negLimit):
			if theWorld[x][y] == True:
				mc.setBlock(x + negLimit, worldFloor, y + negLimit, block.DIAMOND_BLOCK)
			else:
				mc.setBlock(x + negLimit, worldFloor, y + negLimit, block.OBSIDIAN)

	# Check number of neighbors alive
	for x in range(posLimit - negLimit):
		for y in range(posLimit - negLimit):
			
			if x == 0:
				xMinus = posLimit - negLimit
			else:
				xMinus = x - 1

			if x == posLimit - negLimit:
				xPlus = 0
			else:
				xPlus = x + 1

			if y == 0:
				yMinus = posLimit - negLimit
			else:
				yMinus = y - 1

			if y == posLimit - negLimit:
				yPlus = 0
			else:
				yPlus = y + 1

			alive = 0			

			if theWorld[xPlus][yPlus]:
				alive += 1
			if theWorld[x][yPlus]:
				alive += 1
			if theWorld[xMinus][yPlus]:
				alive += 1
			if theWorld[xPlus][y]:
				alive += 1
			if theWorld[xMinus][y]:
				alive += 1
			if theWorld[xPlus][yMinus]:
				alive += 1
			if theWorld[x][yMinus]:
				alive += 1
			if theWorld[xMinus][yMinus]:
				alive += 1

			# Calculate which cells live and die in next generation
			if theWorld[x][y] == False:
				if alive == 3:
					theNextWorld[x][y] = True
			else:
				if alive < 2:
					theNextWorld[x][y] = False
				elif alive > 3:
					theNextWorld[x][y] = False
				else:
					theNextWorld[x][y] = True
	# Copy array
	theWorld = theNextWorld.copy()