用户交互----进入游戏

一、增加交互----点击和拖动

1、点击鼠标画点的程序

设置

import pygame                           # Setup
pygame.init()
screen = pygame.display.set_mode([800,600])
pygame.display.set_caption("单击画圆点")
keep_going = True
RED = (255,0,0)                         # RGB color triplet for RED
radius = 15

在游戏循环中处理鼠标点击事件 

while keep_going:                       # Game loopfor event in pygame.event.get():    # Handling events if event.type == pygame.QUIT: keep_going = Falseif event.type == pygame.MOUSEBUTTONDOWN:spot = event.pospygame.draw.circle(screen, RED, spot, radius)

更新屏幕以及退出时要干嘛并整合 

# ClickDots.py
import pygame                           # Setup
pygame.init()
screen = pygame.display.set_mode([800,600])
pygame.display.set_caption("单击画圆点")
keep_going = True
RED = (255,0,0)                         # RGB color triplet for RED
radius = 15
while keep_going:                       # Game loopfor event in pygame.event.get():    # Handling events if event.type == pygame.QUIT: keep_going = Falseif event.type == pygame.MOUSEBUTTONDOWN:spot = event.pospygame.draw.circle(screen, RED, spot, radius)pygame.display.update()             # Update displaypygame.quit()                           # Exit

2、拖动绘制连续的圆点的程序

拖动的特点是鼠标在按下的同时鼠标在移动。

该程序的总体结构与上面相同，故直接给出代码：

# DragDots.py
import pygame                           # Setup
pygame.init()
screen = pygame.display.set_mode([800,600])
pygame.display.set_caption("Click and drag to draw")
keep_going = True
YELLOW = (255,255,0)                    # RGB color triplet for YELLOW
radius = 15
mousedown = False
while keep_going:                       # Game loopfor event in pygame.event.get():    # Handling eventsif event.type == pygame.QUIT: keep_going = Falseif event.type == pygame.MOUSEBUTTONDOWN:mousedown = Trueif event.type == pygame.MOUSEBUTTONUP:mousedown = Falseif mousedown:                       # Draw/update graphicsspot = pygame.mouse.get_pos()pygame.draw.circle(screen, YELLOW, spot, radius)pygame.display.update()             # Update displaypygame.quit()                           # Exit

二、高级交互----笑脸爆炸

1、笑脸精灵

2、设置精灵

3、更新精灵

4、较大和较小的笑脸

5、整合

三、SmileyPop1.0版

1、检测碰撞和删除精灵

2、整合

四、本章小结

五、编程挑战