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life_of.py
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life_of.py
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# Conway's Game of Life in Python
# by Oscar Rundh, @Shadovo
# April 6, 2013
import curses
import time
import random
screen = curses.initscr()
dims = screen.getmaxyx()
curses.curs_set(0)
curses.noecho()
screen.nodelay(1)
char = '@'
deadChar = ' '
percentChanceOfLife = 20
class Cell(object):
def __init__(self, y, x):
self.alive = bool(random.randrange(0, 100) < percentChanceOfLife)
self.y = y
self.x = x
def __repr__(self):
return self.alice
def is_cell_alive(y, x, cells):
""" Check if the cell is currently displaied as alive """
if y >= dims[0]-1:
y = 0
if x >= dims[1]:
x = 0
if y < 0:
y = dims[0]-1
if x < 0:
x = dims[1]
return (screen.inch(y, x) == ord(char))
def cell_neighbour_count(y, x, cells):
""" Count the number of alive neighbours """
count = 0
if is_cell_alive(y-1, x-1, cells):
count += 1
if is_cell_alive(y, x-1, cells):
count += 1
if is_cell_alive(y+1, x-1, cells):
count += 1
if is_cell_alive(y-1, x, cells):
count += 1
if is_cell_alive(y+1, x, cells):
count += 1
if is_cell_alive(y-1, x+1, cells):
count += 1
if is_cell_alive(y, x+1, cells):
count += 1
if is_cell_alive(y+ 1, x+1, cells):
count += 1
return count
def should_cell_live(y, x, cells):
""" Check if the cell should be alive for next rendering """
neighbours = cell_neighbour_count(y, x, cells)
if screen.inch(y, x) == ord(char):
if neighbours == 2 or neighbours == 3:
return True
else:
return False
elif(neighbours == 3):
return True
else:
return False
def update_cell_statuses(cells):
""" Update the status of the cells for the next rendering """
changedCells = []
for y in range(0, dims[0]-1):
for x in range(0, dims[1]):
index = int(y * (dims[1]) + x)
previusState = cells[index].alive
newState = should_cell_live(y, x, cells)
if previusState != newState:
cells[index].alive = newState
changedCells.append(cells[index])
return changedCells
def first_rendering(cells):
for y in range(0, dims[0]-1):
for x in range(0, dims[1]):
index = int(y * (dims[1]) + x)
if cells[index].alive:
screen.addch(y, x, char)
else:
screen.addch(y, x, deadChar)
def render_board(cells):
""" Render all alive cells to the board and remove the dead """
for cell in cells:
if cell.alive:
screen.addch(cell.y, cell.x, char)
else:
screen.addch(cell.y, cell.x, deadChar)
def create_cells():
""" Create a random pattern of living cells """
cells = []
for y in range(0, dims[0]-1):
for x in range(0, dims[1]):
cells.append(Cell(y, x))
return cells
def create_stress_test():
""" A stress test with a heavy pattern, a staraight line full with living cells """
cells = []
for y in range(0, dims[0]-1):
for x in range(0, dims[1]):
tempCell = Cell(y, x)
tempCell.alive = bool(y == int(dims[0]/2))
cells.append(tempCell)
return cells
def game():
""" Start a game of life """
# cells = create_cells()
# Create a stress test with a heavy starting pattern
cells = create_stress_test()
first_rendering(cells)
q = -1
screen.refresh()
while q != ord('q'):
q = screen.getch()
if q == ord('p'):
time.sleep(5)
elif q == ord('r'):
break
changedCells = update_cell_statuses(cells)
render_board(changedCells)
screen.refresh()
time.sleep(0.05)
else:
curses.endwin()
exit()
game()
game()
curses.endwin()