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from random import sample
import time
from robots.constants import City
def ceil_div(a, b):
"""Divide a by b, rounding towards infinity."""
return -(-a // b)
def ilen(items):
return sum(1 for _ in items)
def immutable(value):
if isinstance(value, str):
return value
try:
return immutable(list(sorted(value.items())))
except AttributeError:
pass
try:
return tuple(immutable(v) for v in value)
except TypeError:
pass
return value
def add_spawns(map_, n_spawns, city=None):
available = []
for x, y, cell in iter_board(map_):
if cell != City.GHOST:
available.append((x, y))
spawns = sample(available, n_spawns)
for i, (x, y) in enumerate(spawns):
map_[y][x] = city or str(i)
def empty_map(width, height, n_spawns):
board = [['.'] * width for y in range(height)]
add_spawns(board, n_spawns)
return board
def border_map(width, height, n_spawns):
board = [
['.'] * (width + 2)
for y in range(height + 2)
]
for x in range(width + 2):
board[0][x] = City.GHOST
board[-1][x] = City.GHOST
for y in range(height + 2):
board[y][0] = City.GHOST
board[y][-1] = City.GHOST
add_spawns(board, n_spawns)
return board
def rate_limit(fps):
delay_ms = 1. / fps
while True:
# time one iteration of the loop
start = time.time()
yield
end = time.time()
yield_time = end - start
# delay to fill up the rest of the time
wait_time = delay_ms - yield_time
if wait_time < 0:
# TODO: log failure
# log.debug('not meeting rate (%.2f ms)' % (wait_time * 1000))
continue
time.sleep(wait_time)
def iter_board(board):
for y, row in enumerate(board):
for x, cell in enumerate(row):
yield x, y, cell
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