雨滴:寻找一幅雨滴图像,并创建一系列整齐排列的雨滴。让这些雨滴往下落,直到到达屏幕后消失。
先说今天的问题:
1.在更改函数形参时,调用的时候也要修改,否则会出现AttributeError
值得注意的是:每当添加进新的代码,要检查函数传递的参数是否对应一致,函数本身与调用它的时候都要检查
2.愚蠢的错误:把创建整齐雨滴的函数写到循环体中去了,结果一直出现重叠,达不到预期效果,搞了半天眼睛快瞎了才发现,唉!
主程序 display
import pygame from settings import Settings from rain import Rain import func as f from pygame.sprite import Group##### def display(): """主函数----显示雨滴效果""" pygame.init() settings = Settings() screen = pygame.display.set_mode((settings.screen_width, settings.screen_height)) pygame.display.set_caption('Raining') rains = Group()#### f.create_rains(settings, screen, rains)##### while True: f.check_events() screen.fill(settings.bg_color) f.change_direction(settings, rains) rains.draw(screen) pygame.display.flip() display()
函数模块func
import pygame import sys from rain import Rain def check_events(): """按键检查""" for event in pygame.event.get(): if event.type == pygame.QUIT: sys.exit() def get_col_numbers(settings, rain):#对于每一行来说,变化的是x坐标,列在变化 """一行可以存放的雨滴数""" col_numbers = int(settings.screen_width / (2 * rain.rect.width)) return col_numbers def get_row_numbers(settings, rain): """可存放雨滴的行数""" row_numbers = int(settings.screen_height / (1 * rain.rect.height)) return row_numbers def create_rain(settings, screen, rains, col_number, row_number): rain = Rain(settings, screen) rain_width = rain.rect.width rain.x = rain_width + 2 * rain_width * col_number rain.rect.x = rain.x#rect存放整数 rain.rect.y = rain.rect.y + 2 * rain.rect.height * row_number rains.add(rain) def create_rains(settings, screen, rains): rain = Rain(settings, screen)#这句是要写的,不写的话get_col_numbers()中的rain将出现NameError col_numbers = get_col_numbers(settings, rain) row_numbers = get_row_numbers(settings, rain) for row_number in range(row_numbers): for col_number in range(col_numbers): create_rain(settings, screen, rains, col_number, row_number) def change_direction(settings, rains): for rain in rains.sprites(): rain.rect.y += settings.drop_speed
rain类:
import pygame from pygame.sprite import Sprite class Rain(Sprite): """雨滴""" def __init__(self, settings, screen): super().__init__() self.screen = screen self.settings = settings self.image = pygame.image.load('rain.bmp') self.rect = self.image.get_rect() self.y = float(self.rect.y) def blitme(self): self.screen.blit(self.image, self.rect)
def check_edges(self): """如果雨滴位于屏幕边缘就返回True""" if self.rect.top >= self.screen.rect.bottom: return True
settings类:
class Settings(): """设置所有设置的类""" def __init__(self): self.screen_width = 1200 self.screen_height = 600 self.bg_color = (255, 255, 255) self.drop_speed = 1
效果图:
初始:
下落: