Python中的画图初体验
学到《父与子编程之旅》的16章了，跟书上的例子进行学习，学会了画圆，我又找到了画线的方法，于是就可以在screen上画日本国旗了：手动画的不好看，也可以不手动画，直接画线：
当然也可以直接画个矩形套在外面：
代码如下：
1 import pygame,sys
2 from pygame.locals import *
3 print pygame.ver
4 pygame.init()
5 screen = pygame.display.set_mode()
6 color=(200,156,64)
7 points=[]
8 screen.fill()
9 pygame.draw.circle(screen,,,70,0)
10 ##pygame.draw.line(screen,color,(20,20),(400,20),1)
11 ##pygame.draw.line(screen,color,(20,20),(20,400),1)
12 ##pygame.draw.line(screen,color,(20,400),(400,400),1)
13 ##pygame.draw.line(screen,color,(400,400),(400,20),1)
14 pygame.draw.rect(screen,,,1)
15 pygame.display.flip()
16 running = True
17 while running:
18 for event in pygame.event.get():
19 if event.type == pygame.QUIT:
20 running = False
21 ## if event.type==MOUSEBUTTONDOWN:
22 ## points.append(event.pos)
23 ## if len(points)>1:
24 ## pygame.draw.lines(screen,color, False, points, 5)
25 ## pygame.display.update()
26 pygame.quit()
下面画一个“艺术品”，100个随机颜色随机大小的矩形，这也是书上的例子，不过让我改了一种写法，熟悉一下Python：
1 import pygame,sys,random
2 from pygame.color import THECOLORS
3 class draw:
4 def drawThePic(self):
5 pygame.init()
6 screen = pygame.display.set_mode()
7 screen.fill()
8 for i in range(100):
9 forRect = []
10 for j in range(4):
11 forRect.append(random.randint(0,250))
12 pygame.draw.rect(screen,self.chooseColor(),forRect,2)
13 pygame.display.flip()
14 running = True
15 while running:
16 for event in pygame.event.get():
17 if event.type == pygame.QUIT:
18 running = False
19 pygame.quit()
20 def chooseColor(self):
21 color_name = random.choice(THECOLORS.keys())
22 color = THECOLORS
23 return color
24 drawer = draw()
25 drawer.drawThePic()
上面这段程序需要注意一下，刚接触Python，调试中总会出现问题，比如改变列表中的变量的值的时候并不改变列表的值，还有方法定义的时候一定要在括号里加上self，还有调用的时候也要在前面加上self或者其他类的名字。
接下来，画一个正弦曲线：
以上是通过一个又一个小矩形拼成的不连续的正弦曲线，也可以画一个连续的正弦曲线，如下：
代码如下（##后面是之前画“艺术品”时的代码，#后面是不连续正弦曲线的代码）：
1 import pygame,sys,random
2 from pygame.color import THECOLORS
3 import math
4 class draw:
5 def drawThePic(self):
6 pygame.init()
7 screen = pygame.display.set_mode()
8 screen.fill()
9 plotPoints = []
10 for x in range(0,640):
11 y = int(math.sin(x/640.0 * 4 * math.pi) * 200 +240)
12 plotPoints.append()
13 # forRect =
14 ## for j in range(4):
15 ## forRect.append(random.randint(0,500))
16 # pygame.draw.rect(screen,self.chooseColor(),forRect,2)
17 pygame.draw.lines(screen,self.chooseColor(),False,plotPoints,1)
18 pygame.display.flip()
19 running = True
20 while running:
21 for event in pygame.event.get():
22 if event.type == pygame.QUIT:
23 running = False
24 pygame.quit()
25 def chooseColor(self):
26 color_name = random.choice(THECOLORS.keys())
27 color = THECOLORS
28 return color
29 drawer = draw()
30 drawer.drawThePic()
至此，我已经学会了画线，画正弦曲线，画圆，画矩形，um……附上一个“艺术品”的图片：
接下来，我们来做些背景图片：
代码如下：
1 import pygame, sys
2 class ImageRun:
3 def letImageRun(self):
4 pygame.init()
5 screen = pygame.display.set_mode()
6 screen.fill()
7 background = pygame.image.load("C:/Users/dswu/Desktop/back.jpg")
8 screen.blit(background,(0,0))
9 my_image = pygame.image.load("C:/Users/dswu/Desktop/fuck16.jpg")
10 screen.blit(my_image, )
11 pygame.display.flip()
12 running = True
13 while running:
14 for event in pygame.event.get():
15 if event.type ==pygame.QUIT:
16 running = False
17 pygame.quit()
18 runImage = ImageRun()
19 runImage.letImageRun()
在此基础上我们就可以做个小动画了，让图片动起来：
以下代码能够让妙蛙种子左右来回运动（碰壁就反弹）：
1 import pygame, sys
2 class ImageRun:
3 def letImageRun(self):
4 pygame.init()
5 screen = pygame.display.set_mode()
6 screen.fill()
7 background = pygame.image.load("C:/Users/dswu/Desktop/back.png")
8 screen.blit(background,(0,0))
9 my_image = pygame.image.load("C:/Users/dswu/Desktop/player.png")
10 x = 400
11 y = 50
12 x_speed = 5
13 screen.blit(my_image, )
14 pygame.display.flip()
15 running = True
16 while running:
17 for event in pygame.event.get():
18 if event.type ==pygame.QUIT:
19 running = False
20 #Let the image run.
21 for looper in range(1,100):
22 pygame.time.delay(20)
23 background = pygame.image.load("C:/Users/dswu/Desktop/back.png")
24 screen.blit(background,(0,0))
25 pygame.display.flip()
26 pygame.time.delay(1)
27 x = x + x_speed
28 if x < 0 or x > screen.get_width() - my_image.get_width():
29 x_speed = - x_speed
30 screen.blit(my_image,)
31 pygame.display.flip()
32 pygame.quit()
33 runImage = ImageRun()
34 runImage.letImageRun()
接下来……
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