【发布时间】：2020-04-08 01:42:02
【问题描述】：
我目前正在制作一个吃豆人游戏，并且我创建了一个函数来确定幽灵应该将每个按键移动到哪里以便更靠近玩家
from pygame.locals import *
import numpy
def distcalc(start, end):
y_dist = start[0]-end[0]
x_dist = start[1]-end[1]
total_dist = y_dist + x_dist
if total_dist < 0:
total_dist = -total_dist
return total_dist
def sort(data):
sorted_x = (sorted(data.items(), key=lambda kv: kv[1]))
new_data = dict(sorted_x)
return(new_data)
def pathfind(matrix, start, end):
dict_ = {}
start.reverse()
end.reverse()
children = [(start[0], start[1]-1), (start[0], start[1]+1), (start[0]-1, start[1]), (start[0]+1, start[1])]
print(children)
for item in reversed(children):
if a[item] == 0:
children.remove(item)
for item in children:
dict_[item] = distcalc(item, end)
sorteddict= sort(dict_)
print(sorteddict)
coordinates = (list(sorteddict.keys()))
move = coordinates[0]
if move[0] > start[1]:
print('down')
return 'down'
elif move[0] < start[1]:
print('up')
return 'up'
elif move[1] < start[0]:
print('left')
return 'left'
elif move[1] > start[0]:
print('right')
return 'right'
#constants representing colour
BLACK = (0, 0, 0 )
BROWN = (153, 76, 0 )
GREEN = (0, 255, 0 )
BLUE = (0, 0, 255)
WHITE = (255, 255, 255)
#constants representing the different resources
W = 0
P = 1
G = 2
#a dictionary linking resources to textures
textures = {
W : pygame.image.load('wall.png'),
G : pygame.image.load('path.png'),
P : pygame.image.load('path+pellet.png')
}
level = 1
tilemap = [
[W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W],
[W, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, W],
[W, P, W, W, W, P, W, W, W, P, P, W, P, W, P, W, W, W, P, W],
[W, P, W, W, W, P, P, P, P, P, P, W, P, P, P, W, W, W, P, W],
[W, P, W, W, W, P, W, W, W, P, P, W, W, W, P, W, W, W, P, W],
[W, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, W],
[W, W, W, W, W, P, W, W, W, W, W, W, W, W, P, W, W, W, W, W],
[P, P, P, P, P, P, W, P, P, P, P, P, P, W, P, P, P, P, P, P],
[W, W, W, W, W, P, W, W, W, P, P, W, W, W, P, W, W, W, W, W],
[W, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, W],
[W, P, W, W, P, W, P, W, P, W, W, W, W, P, W, P, W, W, P, W],
[W, P, W, W, P, W, P, W, P, P, P, P, W, P, W, P, W, W, P, W],
[W, P, W, W, P, W, P, W, W, W, W, P, W, P, W, P, W, W, P, W],
[W, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, P, W],
[W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W],
]
a = numpy.array(tilemap)
#useful game dimensions
TILESIZE = 40
MAPWIDTH = 20
MAPHEIGHT = 15
#set up the display
pygame.init()
DISPLAYSURF = pygame.display.set_mode((MAPWIDTH*TILESIZE,MAPHEIGHT*TILESIZE))
#the player image
PLAYER = pygame.image.load('pacman.png')
GHOST = pygame.image.load('ghost.png')
#the position of the player [x,y]
ghostPos = [7,7]
playerPos = [2,1]
while True:
#get all the user events
for event in pygame.event.get():
#if the user wants to quit
if event.type == QUIT:
#end the game and close the window
pygame.quit()
sys.exit()
#if a key is pressed
elif event.type == KEYDOWN:
if pathfind(a, ghostPos, playerPos) == 'left':
ghostPos[0]-=1
elif pathfind(a, ghostPos, playerPos) == 'right':
ghostPos[0]+=1
elif pathfind(a, ghostPos, playerPos) == 'up':
ghostPos[1]-=1
elif pathfind(a, ghostPos, playerPos) == 'down':
ghostPos[0]+=1
print(playerPos)
print(ghostPos)
#if the right arrow key is pressed
if event.key == K_RIGHT:
PLAYER = pygame.image.load('pacman.png')
if playerPos[0] == 19 and playerPos[1] == 7:
playerPos = [-1,7]
if tilemap[playerPos[1]][ playerPos[0]+1] == 2 or tilemap[playerPos[1]][ playerPos[0]+1] == 1:
if tilemap[playerPos[1]][ playerPos[0]] == 1:
tilemap[playerPos[1]][ playerPos[0]] = 2
playerPos[0] += 1
#if the left arrow key is pressed
if event.key == K_LEFT:
PLAYER = pygame.image.load('pacmanL.png')
if playerPos[0] == 0 and playerPos[1] == 7:
playerPos = [19,7]
if tilemap[playerPos[1]][ playerPos[0]-1] == 2 or tilemap[playerPos[1]][ playerPos[0]-1] == 1:
if tilemap[playerPos[1]][ playerPos[0]] == 1:
tilemap[playerPos[1]][ playerPos[0]] = 2
playerPos[0] -= 1
#if the up arrow key is pressed
if event.key == K_UP:
PLAYER = pygame.image.load('pacmanU.png')
if tilemap[playerPos[1]-1][ playerPos[0]] == 2 or tilemap[playerPos[1]-1][ playerPos[0]] == 1:
if tilemap[playerPos[1]][ playerPos[0]] == 1:
tilemap[playerPos[1]][ playerPos[0]] = 2
playerPos[1] -= 1
#if the down arrow key is pressed
if event.key == K_DOWN:
PLAYER = pygame.image.load('pacmanD.png')
if tilemap[playerPos[1]+1][ playerPos[0]] == 2 or tilemap[playerPos[1]+1][ playerPos[0]] == 1:
if tilemap[playerPos[1]][ playerPos[0]] == 1:
tilemap[playerPos[1]][ playerPos[0]] = 2
playerPos[1] += 1
# draw map by looping through each row then column
for row in range(MAPHEIGHT):
#loop through each column in the row
for column in range(MAPWIDTH):
# draw the resource at that position in the tilemap, using the correct image
DISPLAYSURF.blit(textures[tilemap[row][column]], (column*TILESIZE,row*TILESIZE))
# display the player at the correct position
DISPLAYSURF.blit(PLAYER,(playerPos[0]*TILESIZE,playerPos[1]*TILESIZE))
# displays the first ghost
DISPLAYSURF.blit(GHOST, (ghostPos[0]*TILESIZE, ghostPos[0]*TILESIZE))
#update the display
pygame.display.update()
但是每个键都按下寻路函数打印的打印语句两次，这就是我得到的
{(7, 8): 12}
right
[(7, 6), (7, 8), (6, 7), (8, 7)]
{(7, 8): 12}
right
[2, 1]
[8, 7]
我了解缺少注释可能会使代码难以理解，但我希望有人可以确定为什么该函数似乎运行了两次它在 KEYDOWN 部分下被调用，谢谢
【问题讨论】：
-
顺便说一句，变量和函数名称通常应遵循
lower_case_with_underscores样式。