在我之前的question中,我遇到了精灵的麻烦。所以我决定在画之前先用清晰的方法。它似乎起了作用,但当精灵到达屏幕的底部时,也就是他们应该回到顶部的时候,他们消失了。9人中只剩下2人
#!/usr/bin/python
VERSION = "0.1"
import os, sys, raindrop
from os import path
try:
import pygame
from pygame.locals import *
except ImportError, err:
print 'Could not load module %s' % (err)
sys.exit(2)
# main variables
WIDTH, HEIGHT, FPS = 300, 300, 30
# initialize game
pygame.init()
screen = pygame.display.set_mode((WIDTH,HEIGHT))
pygame.display.set_caption("Rain and Rain")
# background
background = pygame.Surface(screen.get_size())
background = background.convert()
background.fill((40,44,52))
# blitting
screen.blit(background,(0,0))
pygame.display.flip()
# clock for FPS settings
clock = pygame.time.Clock()
def main():
raindrops = pygame.sprite.Group()
# a function to create new drops
def newDrop():
nd = raindrop.Raindrop()
raindrops.add(nd)
# creating 10 rain drops
for x in range(0,9): newDrop()
# variable for main loop
running = True
# event loop
while running:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
screen.blit(background,(100,100))
raindrops.clear(screen,background)
raindrops.update()
raindrops.draw(screen)
pygame.display.flip()
pygame.quit()
if __name__ == '__main__': main()
import pygame
from pygame.locals import *
from os import path
from random import randint
from rain import HEIGHT
img_dir = path.join(path.dirname(__file__), 'img')
class Raindrop(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.width = randint(32, 64)
self.height = self.width + 33
self.image = pygame.image.load(path.join(img_dir, "raindrop.png")).convert_alpha()
self.image = pygame.transform.scale(self.image, (self.width, self.height))
self.speedy = 5 #randint(1, 8)
self.rect = self.image.get_rect()
self.rect.x = randint(0, 290)
self.rect.y = -self.height
def update(self):
self.rect.y += self.speedy
if self.rect.y == HEIGHT:
self.rect.y = -self.height
self.rect.x = randint(0, 290)
问题是有些雨滴会超过
HEIGHT
,因为speedy
是[1,8]范围内的随机数,所以speedy
的倍数可能不能被2*HEIGHT
整除。例如speedy = 7
,rect.y
从-HEIGHT=-300到-293,-286,…,295,然后到大于300的302,因此==
检查将永远不会为真,雨滴将永远下降对
>=
的简单更改将解决问题:相关问题 更多 >
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