大家好，我是涵子。今天我为大家带来pygame-pymunk的台球游戏！

友情提醒：

如果不认识pymunk的同学可以去看看之前的文章：

python-编程宇宙-计算机网络的宇宙https://blog.csdn.net/B20111003/article/details/125540816?spm=1001.2014.3001.5502希望大家可以更加了解pymunk！

一、前面准备

二、中间程序

三、最后程序

四、效果图

五、完整代码

六、总结

一、前面准备

和之前一样，就是加了一个pymunk和一些变量：

# -coding utf-8 -
# import pygame, pymunk and sys
import pygame as pg
import pymunk as pm
import sys# init program
pg.init()
# set screen
screen = pg.display.set_mode((800, 500)) # cannot change the size of the screen
# set title
pg.display.set_caption("Billiards", "4.0")# pymunk Space
space = pm.Space()
# gravity
# gravity and speed
space.gravity = (0, 0) # gravity = 0# colors for draw
white = (236, 240, 241)  # white
gray = (123, 125, 125) # gray
stage = (51, 51, 51) # stagepoints = [""] * 16 # particleBallsballs = [""] * 16 # rigid bodiesy = 0 # Yposx = 0 # Xposn = 5 # create n# colors, use for balls
colors = ["yellow", "blue", "red", "purple", "orange", "green", "brown", "black", "yellow", "blue", "red", "purple", "orange", "green", "brown","white"]

pymunk.sapce和gravity是啥？没事，我们来看看：

这就是用pymunk做的一个程序。之前的文章里有代码。

space就是指一个空间，gravity就是重力。我们不需要重力。

二、中间程序

# def draw
def draw():# screen fillscreen.fill(white)# draw stagepg.draw.line(screen, gray, (0, 250), (800, 250), 500)pg.draw.line(screen, stage, (20, 250), (780, 250), 460)# draw a ball in the pygame, pos is the points' and balls'# make the ball has gravity# show the ball# use rangefor i in range(16):# if it appears, then--# if it doesn't, don't draw it, or system wrongif points[i]:# --draw circlepg.draw.circle(screen, colors[i], points[i].position, 10)# update space, can change ball's positionspace.step(0.2) # use space.step# create holes this list
holes = [(20,20),(400,20),(780,20),(20,480),(400,480),(780,480)]# def drawHole
def drawHole():# use loopfor h in holes:# draw circlepg.draw.circle(screen,'gray',h,20)# def dis
def dis():# global firstglobal points,balls# use loopfor i,p in enumerate(points):# check posfor h in holes:# checkif p and (p.position[0]-h[0])**2+(p.position[1]-h[1])**2<400:# make the ball disappearpoints[i] = ""balls[i] = ""# def friction
def friction():# make the balls speed be slower and slower# global first!global pointsfor v in points:# if v is appearif v:# then make the speed slowerv.velocity *= 0.99# def cue
def cue():# get white ball speed(velocity)# it is a little bit difficult# if abs(speed) < 0.1, the do next# because of there will have -num, so we need abs!# first need loop!# staticflagstaticFlag = 1for i in points:# check# switch thinking is on again!if i and (abs(i.velocity[0]) > 0.1 or abs(i.velocity[1]) > 0.1):# there's a ball is running!staticFlag = 0# then checkif points[15] and staticFlag == 1:# get posmPos = pg.mouse.get_pos()# draw cuepg.draw.line(screen,(249,231,159),points[15].position,mPos,5)# get if pressedif pg.mouse.get_pressed()[0]:# move ball and cue, and boom!# wallop!points[15].apply_impulse_at_local_point(((points[15].position[0]-mPos[0]),(points[15].position[1]-mPos[1])),(0,0))# create balls
# def create
def create():# global first, or system errorglobal points,balls# create y, x, ny = 0x = 0n = 5# create balls of particle balls and rigid bodiesfor i in range(15):# creat particle balls and rigid bodiespoints[i] = pm.Body(1,2000)points[i].position = 150+x,250+y-n*10balls[i] = pm.Circle(points[i],10)# elasticityballs[i].elasticity = 0.95space.add(points[i],balls[i])y+=20# check posif y>=20*n:# change yy = 0# change xx +=20# chang nn-=1# create white ballpoints[15] = pm.Body(1,2000)points[15].position = 450,250balls[15] = pm.Circle(points[15],10)balls[15].elasticity = 0.95space.add(points[15],balls[15])# def wall
def wall():# create a wall# it umm... difficult, not very easy for everyone# it just like a air wall# put these static_body wall into a listlines = [pm.Segment(space.static_body,(10,10),(790,10),20),pm.Segment(space.static_body,(10,10),(10,490),20),pm.Segment(space.static_body,(790,10),(790,490),20),pm.Segment(space.static_body,(10,490),(790,490),20)]# use range to check linesfor line in lines:# elasticityline.elasticity = 1# frictionline.friction = 0.9space.add(*lines) # add lines

额，好长是不？

没事，我慢慢讲。（此时我已经开始颤抖）

注释里有，自己去翻译吧！

首先，遇到的问题就是画画。

# def draw
def draw():# screen fillscreen.fill(white)# draw stagepg.draw.line(screen, gray, (0, 250), (800, 250), 500)pg.draw.line(screen, stage, (20, 250), (780, 250), 460)# draw a ball in the pygame, pos is the points' and balls'# make the ball has gravity# show the ball# use rangefor i in range(16):# if it appears, then--# if it doesn't, don't draw it, or system wrongif points[i]:# --draw circlepg.draw.circle(screen, colors[i], points[i].position, 10)# update space, can change ball's positionspace.step(0.2) # use space.step

首先画好外面的边框，填满里面的颜色，然后再画出里面的球（后面的程序衔接上这个函数）。可是有一个问题，为什么要有if points[i]，你想想，要是球掉洞里了还会出现吗？

然后面临的问题是画洞和判断球进去了没。

# create holes this list
holes = [(20,20),(400,20),(780,20),(20,480),(400,480),(780,480)]# def drawHole
def drawHole():# use loopfor h in holes:# draw circlepg.draw.circle(screen,'gray',h,20)# def dis
def dis():# global firstglobal points,balls# use loopfor i,p in enumerate(points):# check posfor h in holes:# checkif p and (p.position[0]-h[0])**2+(p.position[1]-h[1])**2<400:# make the ball disappearpoints[i] = ""balls[i] = ""

这里用到了enumerate，额，有难了点哈。

想让球消失，那就把i索引的东西删掉（就是变成一个空字符串）

下面就是噩梦了！（苦痛之路）

# def friction
def friction():# make the balls speed be slower and slower# global first!global pointsfor v in points:# if v is appearif v:# then make the speed slowerv.velocity *= 0.99# def cue
def cue():# get white ball speed(velocity)# it is a little bit difficult# if abs(speed) < 0.1, the do next# because of there will have -num, so we need abs!# first need loop!# staticflagstaticFlag = 1for i in points:# check# switch thinking is on again!if i and (abs(i.velocity[0]) > 0.1 or abs(i.velocity[1]) > 0.1):# there's a ball is running!staticFlag = 0# then checkif points[15] and staticFlag == 1:# get posmPos = pg.mouse.get_pos()# draw cuepg.draw.line(screen,(249,231,159),points[15].position,mPos,5)# get if pressedif pg.mouse.get_pressed()[0]:# move ball and cue, and boom!# wallop!points[15].apply_impulse_at_local_point(((points[15].position[0]-mPos[0]),(points[15].position[1]-mPos[1])),(0,0))# create balls
# def create
def create():# global first, or system errorglobal points,balls# create y, x, ny = 0x = 0n = 5# create balls of particle balls and rigid bodiesfor i in range(15):# creat particle balls and rigid bodiespoints[i] = pm.Body(1,2000)points[i].position = 150+x,250+y-n*10balls[i] = pm.Circle(points[i],10)# elasticityballs[i].elasticity = 0.95space.add(points[i],balls[i])y+=20# check posif y>=20*n:# change yy = 0# change xx +=20# chang nn-=1# create white ballpoints[15] = pm.Body(1,2000)points[15].position = 450,250balls[15] = pm.Circle(points[15],10)balls[15].elasticity = 0.95space.add(points[15],balls[15])# def wall
def wall():# create a wall# it umm... difficult, not very easy for everyone# it just like a air wall# put these static_body wall into a listlines = [pm.Segment(space.static_body,(10,10),(790,10),20),pm.Segment(space.static_body,(10,10),(10,490),20),pm.Segment(space.static_body,(790,10),(790,490),20),pm.Segment(space.static_body,(10,490),(790,490),20)]# use range to check linesfor line in lines:# elasticityline.elasticity = 1# frictionline.friction = 0.9space.add(*lines) # add lines

包含了摩擦力，球杆控制和墙体的定义。

看到了这里，还不点个赞？（非强迫，喜欢就点）

接下来就是干货！（此时要有bgm响起！）

和之前一样用循环遍历所有球，如果有球就减速。没有的话就跳过。接下来$%!)@(*#@$(*&

算了，我已经看见了你们满脸的疑惑。来，我还是慢慢来吧！

这里又一次运用到了开关思维。实在不行的同学直接跳过。到达最后的完整代码就可以了。

太难了是不？

接下来就是用上质点和刚体组成现实（游戏）中的球。相当于用pymunk做出原子核，用pygame泼油漆，做模型。

后面用segment和列表把墙体加入游戏。

后面就是结尾了！

三、最后程序

# use wall
wall()# create balls before loop, or boom, or system wrong
create()
# check fps and events
fps = pg.time.Clock()
while True:# tick fpsfps.tick(60)# quit eventsevent = pg.event.poll()if event.type==pg.QUIT:pg.quit()sys.exit()exit()# main programdis()draw()friction()cue()drawHole()# display programpg.display.update()

好像平平无奇是吗？挺简单的是吗？额，的确是的。

就是调用函数，检查程序退出。

四、效果图

牛皮吧？

五、完整代码

附上完整代码：

# -coding utf-8 -
# import pygame, pymunk and sys
import pygame as pg
import pymunk as pm
import sys# init program
pg.init()
# set screen
screen = pg.display.set_mode((800, 500)) # cannot change the size of the screen
# set title
pg.display.set_caption("Billiards", "4.0")# pymunk Space
space = pm.Space()
# gravity
# gravity and speed
space.gravity = (0, 0) # gravity = 0# colors for draw
white = (236, 240, 241)  # white
gray = (123, 125, 125) # gray
stage = (51, 51, 51) # stagepoints = [""] * 16 # particleBallsballs = [""] * 16 # rigid bodiesy = 0 # Yposx = 0 # Xposn = 5 # create n# colors, use for balls
colors = ["yellow", "blue", "red", "purple", "orange", "green", "brown", "black", "yellow", "blue", "red", "purple", "orange", "green", "brown","white"]# def draw
def draw():# screen fillscreen.fill(white)# draw stagepg.draw.line(screen, gray, (0, 250), (800, 250), 500)pg.draw.line(screen, stage, (20, 250), (780, 250), 460)# draw a ball in the pygame, pos is the points' and balls'# make the ball has gravity# show the ball# use rangefor i in range(16):# if it appears, then--# if it doesn't, don't draw it, or system wrongif points[i]:# --draw circlepg.draw.circle(screen, colors[i], points[i].position, 10)# update space, can change ball's positionspace.step(0.2) # use space.step# create holes this list
holes = [(20,20),(400,20),(780,20),(20,480),(400,480),(780,480)]# def drawHole
def drawHole():# use loopfor h in holes:# draw circlepg.draw.circle(screen,'gray',h,20)# def dis
def dis():# global firstglobal points,balls# use loopfor i,p in enumerate(points):# check posfor h in holes:# checkif p and (p.position[0]-h[0])**2+(p.position[1]-h[1])**2<400:# make the ball disappearpoints[i] = ""balls[i] = ""# def friction
def friction():# make the balls speed be slower and slower# global first!global pointsfor v in points:# if v is appearif v:# then make the speed slowerv.velocity *= 0.99# def cue
def cue():# get white ball speed(velocity)# it is a little bit difficult# if abs(speed) < 0.1, the do next# because of there will have -num, so we need abs!# first need loop!# staticflagstaticFlag = 1for i in points:# check# switch thinking is on again!if i and (abs(i.velocity[0]) > 0.1 or abs(i.velocity[1]) > 0.1):# there's a ball is running!staticFlag = 0# then checkif points[15] and staticFlag == 1:# get posmPos = pg.mouse.get_pos()# draw cuepg.draw.line(screen,(249,231,159),points[15].position,mPos,5)# get if pressedif pg.mouse.get_pressed()[0]:# move ball and cue, and boom!# wallop!points[15].apply_impulse_at_local_point(((points[15].position[0]-mPos[0]),(points[15].position[1]-mPos[1])),(0,0))# create balls
# def create
def create():# global first, or system errorglobal points,balls# create y, x, ny = 0x = 0n = 5# create balls of particle balls and rigid bodiesfor i in range(15):# creat particle balls and rigid bodiespoints[i] = pm.Body(1,2000)points[i].position = 150+x,250+y-n*10balls[i] = pm.Circle(points[i],10)# elasticityballs[i].elasticity = 0.95space.add(points[i],balls[i])y+=20# check posif y>=20*n:# change yy = 0# change xx +=20# chang nn-=1# create white ballpoints[15] = pm.Body(1,2000)points[15].position = 450,250balls[15] = pm.Circle(points[15],10)balls[15].elasticity = 0.95space.add(points[15],balls[15])# def wall
def wall():# create a wall# it umm... difficult, not very easy for everyone# it just like a air wall# put these static_body wall into a listlines = [pm.Segment(space.static_body,(10,10),(790,10),20),pm.Segment(space.static_body,(10,10),(10,490),20),pm.Segment(space.static_body,(790,10),(790,490),20),pm.Segment(space.static_body,(10,490),(790,490),20)]# use range to check linesfor line in lines:# elasticityline.elasticity = 1# frictionline.friction = 0.9space.add(*lines) # add lines# use wall
wall()# create balls before loop, or boom, or system wrong
create()
# check fps and events
fps = pg.time.Clock()
while True:# tick fpsfps.tick(60)# quit eventsevent = pg.event.poll()if event.type==pg.QUIT:pg.quit()sys.exit()exit()# main programdis()draw()friction()cue()drawHole()# display programpg.display.update()

六、总结

通过这次学习和实践，我们更加了解了pymunk和pygame，认识到了python的强大。

最后，我希望大家：点个赞！关注一下。

我将持续更新关于编程的优质文章。希望大家可以和我一起学习知识，一起领略知识的力量！

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python-pygame与pymunk-台球游戏

一、前面准备

二、中间程序

三、最后程序

四、效果图

五、完整代码

六、总结

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