【发布时间】：2019-12-27 18:34:40
【问题描述】：
当我撞到一个平台上时，玩家应该停止移动，它确实停止了移动，但它也略微进入了矩形，所以我找到了一个解决方法，它应该让背景按顺序稍微移动补偿，但它只移动一个平台，如果你反复撞到一个平台，它会导致它无限期地移动。我目前也只是让它等于左右两边的玩家，但是当我使用Level(self).bgX += 10
在控制碰撞的播放器类中的 if 语句中它不起作用，我最终只是在它内部出现故障。
这是我的代码：
import pygame
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
GREEN = (0, 255, 0)
RED = (255, 0, 0)
BLUE = (0, 255, 255)
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
class Player(pygame.sprite.Sprite):
def __init__(self):
super().__init__()
width = 40
height = 60
self.image = pygame.Surface([width, height])
self.image.fill(RED)
self.rect = self.image.get_rect()
self.xVel = 0
self.yVel = 0
self.level = None
def update(self):
self.calc_grav()
Level(self).bgX += self.xVel
block_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
for block in block_hit_list:
if self.xVel < 0:
block.rect.left = 350 + 40
self.friction()
elif self.xVel > 0:
block.rect.right = 350
self.friction()
self.rect.y += self.yVel
block_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
for block in block_hit_list:
if self.yVel > 0:
self.rect.bottom = block.rect.top
elif self.yVel < 0:
self.rect.top = block.rect.bottom
self.yVel = 0
if isinstance(block, MovingPlatform):
Level(self).bgX += block.xVel
def calc_grav(self):
if self.yVel == 0:
self.yVel = 1
else:
self.yVel +=0.5
if self.rect.y >= SCREEN_HEIGHT - self.rect.height and self.yVel >= 0:
self.yVel = 0
self.rect.y = SCREEN_HEIGHT - self.rect.height
def jump(self):
self.rect.y += 2
platform_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
self.rect.y -= 2
if len(platform_hit_list) > 0 or self.rect.bottom >= SCREEN_HEIGHT:
self.yVel = -15
def moveLeft(self):
self.xVel = 6
def moveRight(self):
self.xVel = -6
def friction(self):
self.xVel = 0
class Platform(pygame.sprite.Sprite):
def __init__(self, width, height):
super().__init__()
self.image = pygame.Surface([width, height])
self.image.fill(GREEN)
self.rect = self.image.get_rect()
class MovingPlatform(Platform):
xVel = 0
yVel = 0
boundary_top = 0
boundary_bottom = 0
boundary_left = 0
boundary_right = 0
player = None
level = None
def update(self):
self.rect.x += self.xVel
hit = pygame.sprite.collide_rect(self, self.player)
if hit:
if self.xVel < 0:
self.player.rect.right = self.rect.left
else:
self.player.rect.left = self.rect.right
self.rect.y += self.yVel
hit = pygame.sprite.collide_rect(self, self.player)
if hit:
if self.yVel < 0:
self.player.rect.bottom = self.rect.top
else:
self.player.rect.top = self.rect.bottom
if self.rect.bottom > self.boundary_bottom or self.rect.top < self.boundary_top:
self.yVel *= -1
cur_pos = self.rect.x - self.level.bgX
if cur_pos < self.boundary_left or cur_pos > self.boundary_right:
self.xVel *= -1
class Level(object):
def __init__(self, player):
self.platform_list = pygame.sprite.Group()
self.enemy_list = pygame.sprite.Group()
self.player = player
self.background = None
self.bgX = 0
self.level_limit = -1000
def update(self):
self.platform_list.update()
self.enemy_list.update()
def draw(self, screen):
screen.fill(BLUE)
self.platform_list.draw(screen)
self.enemy_list.draw(screen)
for platform in self.platform_list:
platform.rect.x += self.player.xVel
for enemy in self.enemy_list:
enemy.rect.x += self.player.xVel
class Level_01(Level):
def __init__(self, player):
Level.__init__(self, player)
self.level_limit = -1500
level = [[210, 70, 500, 500],
[210, 70, 800, 400],
[210, 70, 1000, 500],
[210, 70, 1120, 280],
]
for platform in level:
block = Platform(platform[0], platform[1])
block.rect.x = platform[2]
block.rect.y = platform[3]
block.player = self.player
self.platform_list.add(block)
block = MovingPlatform(70, 40)
block.rect.x = 1350
block.rect.y = 280
block.boundary_left = 1350
block.boundary_right = 1600
block.xVel = 1
block.player = self.player
block.level = self
self.platform_list.add(block)
class Level_02(Level):
def __init__(self, player):
Level.__init__(self, player)
self.level_limit = -1000
level = [[210, 70, 500, 550],
[210, 70, 800, 400],
[210, 70, 1000, 500],
[210, 70, 1120, 280],
]
for platform in level:
block = Platform(platform[0], platform[1])
block.rect.x = platform[2]
block.rect.y = platform[3]
block.player = self.player
self.platform_list.add(block)
block = MovingPlatform(70, 70)
block.rect.x = 1500
block.rect.y = 300
block.boundary_top = 100
block.boundary_bottom = 550
block.yVel = -1
block.player = self.player
block.level = self
self.platform_list.add(block)
def main():
pygame.init()
size = [SCREEN_WIDTH, SCREEN_HEIGHT]
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Platformer with moving platforms")
player = Player()
level_list = []
level_list.append(Level_01(player))
current_level_no = 0
current_level = level_list[current_level_no]
active_sprite_list = pygame.sprite.Group()
player.level = current_level
player.rect.x = 350
player.rect.y = SCREEN_HEIGHT - player.rect.height
active_sprite_list.add(player)
done = False
clock = pygame.time.Clock()
# -------- Main Program Loop -----------
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
player.moveLeft()
if event.key == pygame.K_RIGHT:
player.moveRight()
if event.key == pygame.K_UP:
player.jump()
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT and player.xVel > 0:
player.friction()
if event.key == pygame.K_RIGHT and player.xVel < 0:
player.friction()
active_sprite_list.update()
current_level.update()
current_position = current_level.bgX
if current_position < current_level.level_limit:
if current_level_no < len(level_list)-1:
player.rect.x = 350
current_level_no += 1
current_level = level_list[current_level_no]
player.level = current_level
else:
done = True
current_level.draw(screen)
active_sprite_list.draw(screen)
clock.tick(60)
pygame.display.flip()
pygame.quit()
if __name__ == "__main__":
main()
有没有办法让整个背景发生变化而不仅仅是平台？如果有人能告诉我为什么你不能在与平台碰撞后按住右箭头键并同时跳跃，那也会有所帮助。
对于华伦天奴： 这是我在触摸后移动单个块的代码：
block_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
for block in block_hit_list:
if self.xVel < 0:
block.rect.left = 350 + 40
self.friction()
elif self.xVel > 0:
block.rect.right = 350
self.friction()
【问题讨论】：
-
我会说您的解决方法是错误的方法。尝试在碰撞后修复玩家位置，以免出现故障而不是移动背景。并尝试发布MCVE。挖掘所有代码需要大量工作，很难找到能做到这一点的人。
-
好的，我试试
-
我试过了，但这只会让我的角色永远卡在方块里，但这可能是因为我误解了你的评论。碰撞后，我让玩家的 x 值再次等于 350，这是通常的值，但是我的碰撞系统通过使玩家的 x 值等于停止后的块值来工作，并且由于我的角色移动速度适中，因此需要以补偿变化，这就是它向后移动的原因。我的新碰撞代码可以在我上一个问题的底部看到
-
对不起，我明白你的意思了。你的角色永远不会沿着 x 轴移动，它是移动的背景。如果您想坚持这种方法，那么是的，您需要移动整个背景。你能指出碰撞后调整平台坐标的代码部分吗？您应该能够在所有平台上都采用这种方法，而不仅仅是发生冲突的平台。
-
好的。我调整坐标的代码会出现在上一题的底部。
标签： python pygame collision-detection