我希望有人可以帮助我，或者就我的问题给我一些建议。 我一直在玩python的pygame模块，我遇到了一个我似乎无法解决的问题。 我想要发生的是：
然而问题是，在我的代码中，玩家可以只持有“向上箭头”和“向左箭头”并且不断向上飞行，这是我不希望发生的，我不知道如何解决这个问题。我做了很多尝试，所有这些都是徒劳的。
这是完整的代码：
import pygame
from pygame import *
WIN_WIDTH = 800
WIN_HEIGHT = 800
HALF_WIDTH = int(WIN_WIDTH / 2)
HALF_HEIGHT = int(WIN_HEIGHT / 2)
DISPLAY = (WIN_WIDTH, WIN_HEIGHT)
DEPTH = 32
FLAGS = 0
CAMERA_SLACK = 30
MAPLIST = ["LevelOne.txt"]
MAPCOUNT = 0
class Camera(object):
def __init__(self, camera_func, width, height):
self.camera_func = camera_func
self.state = Rect(0, 0, width, height)
def apply(self, target):
return target.rect.move(self.state.topleft)
def update(self, target):
self.state = self.camera_func(self.state, target.rect)
def complex_camera(camera, target_rect):
l, t, _, _ = target_rect
_, _, w, h = camera
l, t, _, _ = -l+HALF_WIDTH, -t+HALF_HEIGHT, w, h
l = min(0, l) # stop scrolling at the left edge
l = max(-(camera.width-WIN_WIDTH), l) # stop scrolling at the right edge
t = max(-(camera.height-WIN_HEIGHT), t) # stop scrolling at the bottom
t = min(0, t) # stop scrolling at the top
return Rect(l, t, w, h)
class Entity(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = Surface((32, 32))
self.image.convert()
self.image.fill(Color("#f21000"))
class Player(Entity):
def __init__(self, x, y):
Entity.__init__(self)
#self.image = pygame.image.load("player.png")
#self.image.convert()
self.rect = Rect(x, y, 32, 32)
self.xvel = 0
self.yvel = 0
self.onGround = False
self.canJump = False
self.wallCollide = False
def jump(self):
if self.onGround:
self.yvel = 0
self.yvel -= 8
self.rect.top += self.yvel
self.onGround=False
self.canJump=False
if self.canJump and not self.onGround:
self.yvel = 0
self.yvel -= 4
self.rect.top += self.yvel
self.onGround = False
self.canJump = False
def update(self, up, down, left, right, running, platforms,entities):
if self.wallCollide and not self.onGround:
if down:
print(self.wallCollide)
if up:
self.jump()
if running:
self.xvel = 1
if left:
self.xvel = -4
if right:
self.xvel = 4
if not self.onGround:
# print("x")
# only accelerate with gravity if in the air
self.yvel += 0.3
# max falling speed
if self.yvel > 100:
self.yvel = 100
if not (left or right):
self.xvel = 0
# increment in x direction
self.rect.left += self.xvel
# do x-axis collisions
self.collide(self.xvel, 0, platforms, entities)
# increment in y direction
if not self.onGround:
self.rect.top += self.yvel
# assuming we're in the air
# do y-axis collisions
self.collide(0,self.yvel, platforms, entities)
def collide(self, xvel, yvel, platforms, entities):
# Player collisions with platforms. e.g. main blocks
for p in platforms:
if pygame.sprite.collide_rect(self, p):
if yvel == 0:
self.wallCollide = True
if xvel > 0:
self.rect.right = p.rect.left # collide right
if xvel < 0:
self.rect.left = p.rect.right # collide left
if yvel > 0:
self.rect.bottom = p.rect.top
self.onGround = True
self.canJump = True
self.yvel = 0
if yvel < 0:
self.rect.top = p.rect.bottom
# if isinstance(p,Platform):
# self.onGround = True
class Platform(Entity):
def __init__(self, x, y):
Entity.__init__(self)
self.image = pygame.image.load("brick.png")
self.image.convert()
self.rect = Rect(x, y, 32, 32)
def LoadMap(platforms,entities,x,y):
currentLevel=[]
mapFile = open(MAPLIST[MAPCOUNT])
for line in mapFile:
currentLevel.append(line)
for row in currentLevel:
for col in row:
if col == "P":
p = Platform(x, y)
platforms.append(p)
entities.add(p)
elif col == "X":
player=Player(x,y)
entities.add(player)
x += 32
y += 32
x = 0
return currentLevel, player
def main():
pygame.init()
screen = pygame.display.set_mode(DISPLAY, FLAGS, DEPTH)
pygame.display.set_caption("Super Meat Boy")
myfont = pygame.font.SysFont("monospace", 40)
timer = pygame.time.Clock()
entities = pygame.sprite.Group()
platforms = []
up = down = left = right = running = False
x = y = 0
bg = Surface((32, 32))
bg.convert()
bg.fill(Color("#66ccff"))
currentLevel,player = LoadMap(platforms,entities,x,y)
total_level_width = len(currentLevel[0]) * 32
total_level_height = len(currentLevel) * 32
camera = Camera(complex_camera, total_level_width, total_level_height)
while True:
clock=timer.tick(60)
for e in pygame.event.get():
if e.type == KEYDOWN and e.key == K_UP:
up = True
if e.type == KEYDOWN and e.key == K_DOWN:
down = True
if e.type == KEYDOWN and e.key == K_LEFT:
left = True
if e.type == KEYDOWN and e.key == K_RIGHT:
right = True
if e.type == KEYDOWN and e.key == K_SPACE:
running = True
if e.type == KEYUP and e.key == K_UP:
up = False
if e.type == KEYUP and e.key == K_DOWN:
down = False
if e.type == KEYUP and e.key == K_RIGHT:
right = False
if e.type == KEYUP and e.key == K_LEFT:
left = False
if e.type == KEYUP and e.key == K_SPACE:
running = False
for y in range(32):
for x in range(32):
screen.blit(bg, (x * 32, y * 32))
camera.update(player)
player.update(up, down, left, right, running, platforms, entities)
for e in entities:
screen.blit(e.image, camera.apply(e))
pygame.display.update()
if __name__ == "__main__":
main()
这是问题所在代码的一部分：
class Player(Entity):
def __init__(self, x, y):
Entity.__init__(self)
#self.image = pygame.image.load("player.png")
#self.image.convert()
self.rect = Rect(x, y, 32, 32)
self.xvel = 0
self.yvel = 0
self.onGround = False
self.canJump = False
self.wallCollide = False
def jump(self):
if self.onGround:
self.yvel = 0
self.yvel -= 8
self.rect.top += self.yvel
self.onGround=False
self.canJump=False
if self.canJump and not self.onGround:
self.yvel = 0
self.yvel -= 4
self.rect.top += self.yvel
self.onGround = False
self.canJump = False
def update(self, up, down, left, right, running, platforms, entities):
if self.wallCollide and not self.onGround:
if down:
print(self.wallCollide)
if up:
self.jump()
if running:
self.xvel = 1
if left:
self.xvel = -4
if right:
self.xvel = 4
if not self.onGround:
# print("x")
# only accelerate with gravity if in the air
self.yvel += 0.3
# max falling speed
if self.yvel > 100:
self.yvel = 100
if not (left or right):
self.xvel = 0
# increment in x direction
self.rect.left += self.xvel
# do x-axis collisions
self.collide(self.xvel, 0, platforms, entities)
# increment in y direction
if not self.onGround:
self.rect.top += self.yvel
# assuming we're in the air
# do y-axis collisions
self.collide(0,self.yvel, platforms, entities)
def collide(self, xvel, yvel, platforms, entities):
# Player collisions with platforms. e.g. main blocks
for p in platforms:
if pygame.sprite.collide_rect(self, p):
if yvel == 0:
self.wallCollide = True
if xvel > 0:
self.rect.right = p.rect.left # collide right
if xvel < 0:
self.rect.left = p.rect.right # collide left
if yvel > 0:
self.rect.bottom = p.rect.top
self.onGround = True
self.canJump = True
self.yvel = 0
if yvel < 0:
self.rect.top = p.rect.bottom
# if isinstance(p,Platform):
# self.onGround = True
总而言之，我不希望玩家在举起“向上箭头”时能够飞上墙。任何帮助或建议将不胜感激。
（对不起，如果我以不正确的格式或地点发布，我是这个网站的新手。）
答案 0 :(得分：0)
这不是一个真正的编码答案，而是更多的设计答案。
视频游戏中跳墙的一种常见设计包括在跳墙时自动给角色“推”。考虑一下Megaman X系列 - 如果你跳到右边的墙上跳下去，它就会把你推到左边。你仍然可以保持正确地从墙上弹跳，但是你无法放大墙壁。
所以我的建议是让walljumps成为一种特殊类型的跳跃，让你的xvel在墙壁对面的方向上大幅提升。
或者，限制角色跳墙的频率。也许一个walljump会翻转一个标志，以阻止一定数量的帧进一步跳转。