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#www.stuffaboutcode.com
#Raspberry Pi, Minecraft Snake
# mcpipy.com retrieved from URL below, written by stuffaboutcode
# http://www.stuffaboutcode.com/2013/03/raspberry-pi-minecraft-snake.html
# License:
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#import the minecraft.py module from the minecraft directory
import mcpi.minecraft as minecraft
#import minecraft block module
import mcpi.block as block
#import time, so delays can be used
import time
#import random module to create random number
import random
import server
#snake class which controls the whole game
class Snake:
def __init__(self, mc, startVec3, playingBottomLeft, playingTopRight):
self.mc = mc
self.direction = "up"
self.lenght = 5
self.tail = []
self.tail.insert(0, startVec3)
self.playingBottomLeft = playingBottomLeft
self.playingTopRight = playingTopRight
self.createApple()
self.score = 0
#draw's the whole snake
def draw(self):
for segment in self.tail:
self.mc.setBlock(segment.x, segment.y, segment.z, block.DIAMOND_BLOCK)
#add's one segment to the snake
def addSegment(self, segment):
self.mc.setBlock(segment.x, segment.y, segment.z, block.DIAMOND_BLOCK)
self.tail.insert(0, segment)
#do I need to clear the last segment
if (len(self.tail) > self.lenght):
lastSegment = self.tail[len(self.tail)-1]
self.mc.setBlock(lastSegment.x, lastSegment.y, lastSegment.z, block.AIR)
#pop the last segment off the tail
self.tail.pop()
#moves the snake, if it cant it returns false (i.e. game over)
def move(self):
newSegment = minecraft.Vec3(self.tail[0].x, self.tail[0].y, self.tail[0].z)
if self.direction == "up":
newSegment.y = newSegment.y + 1
elif self.direction == "down":
newSegment.y = newSegment.y - 1
elif self.direction == "left":
newSegment.x = newSegment.x - 1
elif self.direction == "right":
newSegment.x = newSegment.x + 1
if (self.checkCollision(newSegment) == False):
self.addSegment(newSegment)
#have I eaten the apple?
if (matchVec3(newSegment, self.apple) == True):
#increase my lenght
self.lenght = self.lenght + 2
#increase my score
self.score = self.score + 10
#create a new apple
self.createApple()
return True
else:
#game over
#flash snake head
mc.setBlock(self.tail[0].x, self.tail[0].y, self.tail[0].z, block.AIR)
time.sleep(0.3)
mc.setBlock(self.tail[0].x, self.tail[0].y, self.tail[0].z, block.DIAMOND_BLOCK)
time.sleep(0.3)
mc.setBlock(self.tail[0].x, self.tail[0].y, self.tail[0].z, block.AIR)
time.sleep(0.3)
mc.setBlock(self.tail[0].x, self.tail[0].y, self.tail[0].z, block.DIAMOND_BLOCK)
time.sleep(0.3)
#show score
mc.postToChat("Game over - score = " + str(self.score))
time.sleep(5)
mc.postToChat("www.stuffaboutcode.com")
return False
#function to check if a new segment (or apple) can go there
def checkCollision(self, newSegment):
#am I going the boundary
if ((newSegment.x == playingBottomLeft.x) or (newSegment.y == playingBottomLeft.y) or (newSegment.x == playingTopRight.x) or (newSegment.y == playingTopRight.y)):
return True
else:
#or my own tail
hitTail = False
for segment in self.tail:
if (matchVec3(segment, newSegment) == True):
hitTail = True
return hitTail
#function to change the snake's direction
def changeDirection(self, newDirection):
#code to make sure user doesnt try and make the snake move back on itself
if (newDirection == "up"):
if (self.direction != "down"): self.direction = newDirection
elif (newDirection == "down"):
if (self.direction != "up"): self.direction = newDirection
elif (newDirection == "left"):
if (self.direction != "right"): self.direction = newDirection
elif (newDirection == "right"):
if (self.direction != "left"): self.direction = newDirection
#create the apple at a random position on the board
def createApple(self):
badApple = True
#loop until an apple is created which doesnt collide with the boundary or the snake
while (badApple == True):
x = random.randrange(playingBottomLeft.x, playingTopRight.x)
y = random.randrange(playingBottomLeft.y, playingTopRight.y)
z = playingBottomLeft.z
newApple = minecraft.Vec3(x, y, z)
badApple = self.checkCollision(newApple)
self.apple = newApple
self.mc.setBlock(self.apple.x, self.apple.y, self.apple.z, block.GLOWING_OBSIDIAN)
#Compares vec3 objects, if they are the same returns true
def matchVec3(vec1, vec2):
if ((vec1.x == vec2.x) and (vec1.y == vec2.y) and (vec1.z == vec2.z)):
return True
else:
return False
#draws a vertical outline
def drawVerticalOutline(mc, x0, y0, x1, y1, z, blockType, blockData=0):
mc.setBlocks(x0, y0, z, x0, y1, z, blockType, blockData)
mc.setBlocks(x0, y1, z, x1, y1, z, blockType, blockData)
mc.setBlocks(x1, y1, z, x1, y0, z, blockType, blockData)
mc.setBlocks(x1, y0, z, x0, y0, z, blockType, blockData)
#main program
if __name__ == "__main__":
#constants
screenBottomLeft = minecraft.Vec3(-10,4,15)
screenTopRight = minecraft.Vec3(10,24,15)
playingBottomLeft = minecraft.Vec3(-10, 4, 14)
playingTopRight = minecraft.Vec3(10, 24, 14)
snakeStart = minecraft.Vec3(0, 5, 14)
upControl = minecraft.Vec3(0, -1, 1)
downControl = minecraft.Vec3(0, -1, -1)
leftControl = minecraft.Vec3(-1, -1, 0)
rightControl = minecraft.Vec3(1, -1, 0)
middleControl = minecraft.Vec3(0, 0, 0)
#Connect to minecraft by creating the minecraft object
# - minecraft needs to be running and in a game
mc = minecraft.Minecraft.create(server.address)
#Post a message to the minecraft chat window
mc.postToChat("Hi, Minecraft Snake, www.stuffaboutcode.com")
#Build game board
# clear a suitably large area
mc.setBlocks(-10, 0, -5, 10, 25, 16, block.AIR)
# create playing board
mc.setBlocks(screenBottomLeft.x, screenBottomLeft.y, screenBottomLeft.z, screenTopRight.x, screenTopRight.y, screenTopRight.z, block.STONE)
drawVerticalOutline(mc, playingBottomLeft.x, playingBottomLeft.y, playingTopRight.x, playingTopRight.y, playingTopRight.z, block.OBSIDIAN)
# create control buttons
mc.setBlock(upControl.x, upControl.y, upControl.z, block.DIAMOND_BLOCK)
mc.setBlock(downControl.x, downControl.y, downControl.z, block.DIAMOND_BLOCK)
mc.setBlock(leftControl.x, leftControl.y, leftControl.z, block.DIAMOND_BLOCK)
mc.setBlock(rightControl.x, rightControl.y, rightControl.z, block.DIAMOND_BLOCK)
# blocks around control buttons, to stop player moving off buttons
mc.setBlock(middleControl.x + 2,middleControl.y + 1,middleControl.z, block.GLASS)
mc.setBlock(middleControl.x - 2,middleControl.y + 1,middleControl.z, block.GLASS)
mc.setBlock(middleControl.x,middleControl.y + 1,middleControl.z + 2, block.GLASS)
mc.setBlock(middleControl.x,middleControl.y + 1,middleControl.z - 2, block.GLASS)
mc.setBlock(middleControl.x - 1,middleControl.y + 1,middleControl.z - 1, block.GLASS)
mc.setBlock(middleControl.x - 1,middleControl.y + 1,middleControl.z + 1, block.GLASS)
mc.setBlock(middleControl.x + 1,middleControl.y + 1,middleControl.z + 1, block.GLASS)
mc.setBlock(middleControl.x + 1,middleControl.y + 1,middleControl.z - 1, block.GLASS)
mc.setBlock(middleControl.x,middleControl.y - 1,middleControl.z, block.STONE)
# put player in the middle of the control
mc.player.setPos(middleControl.x + 0.5,middleControl.y,middleControl.z + 0,5)
#time for minecraft to catchup
time.sleep(3)
mc.postToChat("Walk forward, backward, left, right to control the snake")
time.sleep(3)
#create snake
snake = Snake(mc, snakeStart, playingBottomLeft, playingTopRight)
snake.draw()
playing = True
try:
#loop until game over
while playing == True:
#sleep otherwise the snake moves WAY too fast
time.sleep(0.3)
#get players position - are they on a control tile, if so change snake's direction
playerTilePos = mc.player.getTilePos()
playerTilePos.y = playerTilePos.y - 1
if matchVec3(playerTilePos, upControl) == True: snake.changeDirection("up")
elif matchVec3(playerTilePos, downControl) == True: snake.changeDirection("down")
elif matchVec3(playerTilePos, leftControl) == True: snake.changeDirection("left")
elif matchVec3(playerTilePos, rightControl) == True: snake.changeDirection("right")
#move the snake
playing = snake.move()
except KeyboardInterrupt:
print "stopped"
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