学了点基础， 开始实战吧， 先做个小球碰撞的小游戏：
import pygame
import random
import numpy as np
SCREEN_WIDTH =500
SCREEN_HEIGHT = 400
FPS = 50
class circle(pygame.sprite.Sprite):
def __init__(self, screen,r=20):
pygame.sprite.Sprite.__init__(self)
self.r=r
self.screen=screen
self.color=(random.randrange(50,255),random.randrange(50,255),random.randrange(50,255))
self.image = pygame.Surface((2*r,2*r))
self.image.set_colorkey((20,120,20))
self.image.fill((20,120,20))
self.rect=self.image.get_rect()
self.rect.x = random.randrange(SCREEN_WIDTH-self.rect.width)
self.rect.y = random.randrange(SCREEN_HEIGHT-self.rect.height)
pygame.draw.circle(self.image,self.color,(self.r,self.r),self.r)
self.radius=r #this makes ".collide_circle" to detect using circle,rather than rect
self.speedx = random.randrange(1,5)
self.speedy = random.randrange(1,5)
def update(self):
self.rect.move_ip(self.speedx, self.speedy)
self.v=np.array([self.speedx,self.speedy])
if (self.rect.y<=0 or self.rect.y>=SCREEN_HEIGHT-self.rect.height):
self.speedy=-self.speedy
if self.rect.x<=0 or self.rect.x>=SCREEN_WIDTH-self.rect.width:
self.speedx=-self.speedx
self.screen.blit(self.image, self.rect)
pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode((SCREEN_WIDTH , SCREEN_HEIGHT))
c1=circle(screen,30)
balls=pygame.sprite.Group()
for i in range(10):
c=circle(screen)
balls.add(c)
run=True
while pygame.sprite.spritecollideany(c1,balls): #避免一开始就碰撞在一起
c1=circle(screen,30)
while run:
for event in pygame.event.get():
if event.type == pygame.QUIT:
run=False
c=pygame.sprite.spritecollideany(c1,balls)
if c:
#exchange the speed of c1, and c2
c1.speedy,c.speedy=c.speedy,c1.speedy
c1.speedx,c.speedx=c.speedx,c1.speedx
screen.fill((220, 0, 220))
else:
screen.fill((0,0,0))
c1.update()
balls.update()
pygame.display.update()
clock.tick(FPS)
