大家好，我是涵子码农。今天我会为大家带来两个pygame小程序。希望大家可以多多点赞，关注。

我们废话不多说，进入正题！

一、“人间”大炮

1.1.提前准备

1.2.开始编写

1.3.知识分解

1.3.1.认识math.sin和math.cos

1.3.2.认识pygame.mixer和pygame.transform

1.3.3.开关思维

1.3.4.part

1.4.完整代码

二、海浪

2.1.提前准备

2.2.开始编写

2.3.完整代码

三、总结

小提示

没有pygame模块的朋友们要到cmd里面pip一下，程序如下：

pip install pygame

一、“人间”大炮

1.1.提前准备

导入pygame模块和math模块

# import pygame and math
import pygame as pg
import math# init program
pg.init()
pg.mixer.init()screen = pg.display.set_mode((900, 800))
pg.display.set_caption("Code5-2-1_pygame_CannonBomb", "2.0")

1.2.开始编写

这里我们先看一下代码：

def playSound():# play soundpg.mixer.music.load(r"素材\boom.wav")pg.mixer.music.set_volume(0.5)pg.mixer.music.play()# class bomb
class Bomb():def __init__(self):self.color = (0, 0, 0)self.dot = [200, 500]self.r = 10self.speedx = 0 # two speedself.speedy = 0# creat variables
# switch thinking
fps = pg.time.Clock()
power = 0
statueflag = 1
cannonflag = 1
bakage = 1
direction = 0
dirflag = 1
partflag = 1 # what part is now
# check quit and fps
while True:fps.tick(60)event = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()screen.fill((255, 255, 255))pg.draw.line(screen, (0, 255, 0), (0, 580), (900, 580), 10)# partflag changeif partflag == 1:# make power to up and down# don't worry += -1# it just means -= 1power += statueflag# load image# check statueflag and bakageif power == 0:statueflag = 1 # statue changeif power == 100:statueflag = -1 # statue changeif pg.mouse.get_pressed()[0] and partflag == 1:bakage = statueflagstatueflag = 0 # statue changepartflag = 2# loop to waitwhile pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()if pg.mouse.get_pressed()[2] and statueflag == 1 and partflag == 1:statueflag = bakage # statue changeif pg.mouse.get_pressed()[1] and statueflag == 0:power = 0 # power change# drawy = (1- power / 100) * 400 + 100pg.draw.line(screen, (0, 0, 0), (60, 100), (60, 500), 50)pg.draw.line(screen, (255, 0, 0), (60, y), (60, 500), 50)# directionif partflag == 2:direction += dirflagif direction < 0:dirflag = 1if direction > 90:dirflag = -1if pg.mouse.get_pressed()[0] == 1:dirflag = 0partflag = 3# loop to waitwhile pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()# load imagecannon = pg.image.load(r"素材\cannon.png")cannon = pg.transform.scale(cannon,(100, 100))cannon = pg.transform.rotate(cannon, direction)screen.blit(cannon, (50, 500))# part 3if partflag == 3:if pg.mouse.get_pressed()[0]:# cos and sin!# triangle!# ready firebomb = Bomb()bomb.speedx = power*math.cos(2 * math.pi/(360/direction))bomb.speedy = power*math.sin(2 * math.pi/(360/direction))*(-1)pg.draw.circle(screen, bomb.color, bomb.dot, bomb.r, 0)partflag = 4while pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()if partflag == 4:# fire!bomb.dot[0] += int(bomb.speedx) / 4bomb.dot[1] += int(bomb.speedy) / 4bomb.speedy += 0.09pg.draw.circle(screen, bomb.color, bomb.dot, bomb.r, 0)# if hits the ground...if bomb.dot[1] >= 580:partflag = 5continueif partflag == 5:# bomb!playSound()boom = pg.image.load(r"素材\boom.png")boom = pg.transform.scale(boom,(200, 200))screen.blit(boom, (int(bomb.dot[0]), int(bomb.dot[1] - 75)))partflag = 6if partflag == 6:# stoppass# display programpg.display.update()

这里用到了很多个知识，我来讲一下几个知识。

1.3.知识分解

1.3.1.认识math.sin和math.cos

这就是sin函数。这个涉及到初中知识。由于我还是个四年级的小学生（这才知道啊~），所以我只会放一张图片和百度的讲解。大家看不懂或者已经知道了的可以略过此段。（蓝字为链接，可以打开百度百科讲解）

三角函数是数学中属于初等函数中的超越函数的一类函数。它们的本质是任意角的集合与一个比值的集合的变量之间的映射。通常的三角函数是在平面直角坐标系中定义的，其定义域为整个实数域。另一种定义是在直角三角形中，但并不完全。现代数学把它们描述成无穷数列的极限和微分方程的解，将其定义扩展到复数系。

由于三角函数的周期性，它并不具有单值函数意义上的反函数。

三角函数在复数中有较为重要的应用。在物理学中，三角函数也是常用的工具。

在RT△ABC中，如果锐角A确定，那么角A的对边与邻边的比便随之确定，这个比叫做角A 的正切，记作tanA

即tanA=角A 的对边/角A的邻边

同样，在RT△ABC中，如果锐角A确定，那么角A的对边与斜边的比便随之确定，这个比叫做角A的正弦，记作sinA

即sinA=角A的对边/角A的斜边

同样，在RT△ABC中，如果锐角A确定，那么角A的邻边与斜边的比便随之确定，这个比叫做角A的余弦，记作cosA

即cosA=角A的邻边/角A的斜边

1.3.2.认识pygame.mixer和pygame.transform

pygame中的mixer库可以放出音乐

pygame中的transform库可以把图片进行很多处理

更多知识到后面会进行更加细致的学习~

1.3.3.开关思维

开关思维，就是一种思维上的开关。

开关控制着程序的运行，进度条的上下运动，大炮的发射，都由开关控制。

1.3.4.part

part把程序分为几个部分

就好比如：part1：进度条运动

if partflag == 1:# make power to up and down# don't worry += -1# it just means -= 1power += statueflag# load image# check statueflag and bakageif power == 0:statueflag = 1 # statue changeif power == 100:statueflag = -1 # statue changeif pg.mouse.get_pressed()[0] and partflag == 1:bakage = statueflagstatueflag = 0 # statue changepartflag = 2# loop to waitwhile pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()if pg.mouse.get_pressed()[2] and statueflag == 1 and partflag == 1:statueflag = bakage # statue changeif pg.mouse.get_pressed()[1] and statueflag == 0:power = 0 # power change

part2：大炮转向

if partflag == 2:direction += dirflagif direction < 0:dirflag = 1if direction > 90:dirflag = -1if pg.mouse.get_pressed()[0] == 1:dirflag = 0partflag = 3# loop to waitwhile pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()

......

1.4.完整代码

# import pygame and math
import pygame as pg
import math# init program
pg.init()
pg.mixer.init()screen = pg.display.set_mode((900, 800))
pg.display.set_caption("Code5-2-1_pygame_CannonBomb", "2.0")def playSound():# play soundpg.mixer.music.load(r"素材\boom.wav")pg.mixer.music.set_volume(0.5)pg.mixer.music.play()# class bomb
class Bomb():def __init__(self):self.color = (0, 0, 0)self.dot = [200, 500]self.r = 10self.speedx = 0 # two speedself.speedy = 0# creat variables
# switch thinking
fps = pg.time.Clock()
power = 0
statueflag = 1
cannonflag = 1
bakage = 1
direction = 0
dirflag = 1
partflag = 1 # what part is now
# check quit and fps
while True:fps.tick(60)event = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()screen.fill((255, 255, 255))pg.draw.line(screen, (0, 255, 0), (0, 580), (900, 580), 10)# partflag changeif partflag == 1:# make power to up and down# don't worry += -1# it just means -= 1power += statueflag# load image# check statueflag and bakageif power == 0:statueflag = 1 # statue changeif power == 100:statueflag = -1 # statue changeif pg.mouse.get_pressed()[0] and partflag == 1:bakage = statueflagstatueflag = 0 # statue changepartflag = 2# loop to waitwhile pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()if pg.mouse.get_pressed()[2] and statueflag == 1 and partflag == 1:statueflag = bakage # statue changeif pg.mouse.get_pressed()[1] and statueflag == 0:power = 0 # power change# drawy = (1- power / 100) * 400 + 100pg.draw.line(screen, (0, 0, 0), (60, 100), (60, 500), 50)pg.draw.line(screen, (255, 0, 0), (60, y), (60, 500), 50)# directionif partflag == 2:direction += dirflagif direction < 0:dirflag = 1if direction > 90:dirflag = -1if pg.mouse.get_pressed()[0] == 1:dirflag = 0partflag = 3# loop to waitwhile pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()# load imagecannon = pg.image.load(r"素材\cannon.png")cannon = pg.transform.scale(cannon,(100, 100))cannon = pg.transform.rotate(cannon, direction)screen.blit(cannon, (50, 500))# part 3if partflag == 3:if pg.mouse.get_pressed()[0]:# cos and sin!# triangle!# ready firebomb = Bomb()bomb.speedx = power*math.cos(2 * math.pi/(360/direction))bomb.speedy = power*math.sin(2 * math.pi/(360/direction))*(-1)pg.draw.circle(screen, bomb.color, bomb.dot, bomb.r, 0)partflag = 4while pg.mouse.get_pressed()[0]:# must check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()if partflag == 4:# fire!bomb.dot[0] += int(bomb.speedx) / 4bomb.dot[1] += int(bomb.speedy) / 4bomb.speedy += 0.09pg.draw.circle(screen, bomb.color, bomb.dot, bomb.r, 0)# if hits the ground...if bomb.dot[1] >= 580:partflag = 5continueif partflag == 5:# bomb!playSound()boom = pg.image.load(r"素材\boom.png")boom = pg.transform.scale(boom,(200, 200))screen.blit(boom, (int(bomb.dot[0]), int(bomb.dot[1] - 75)))partflag = 6if partflag == 6:# stoppass# display programpg.display.update()

二、海浪

2.1.提前准备

和之前差不多：

import pygame as pg
import math, random# init program
pg.init()
screen = pg.display.set_mode((1000, 800))
pg.display.set_caption("Code5-2-4_pygame_WaterWave", "2.0")

2.2.开始编写

定义变量，这里用到了random.uniform，这是用来随机小数的。

这里还有for循环嵌套。

开关思维又来了！

sin函数又来了！

# pos
pos = [0, 600]
# waveX
waveX = 0
# waveY
waveY = 0
# y
y = 1# check loop and fps
fps = pg.time.Clock()
while True:# fps tickfps.tick(60)# check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()# fill screenscreen.fill((255, 255, 255))waveX += random.uniform(0.05, 0.1) # random.uniform is used for decimal representation # switch thinking again!waveY += yif waveY == -5:y = 1 # speed changeif waveY == 200:y = -1 # speed change# drawfor i in range(250):# posX changepos[0] = 4 * i# posY changefor j in range(50):# use math.sinpos[1] = 10 * j + 600 + waveY * math.sin(i / 40 + waveX)# draw circlespg.draw.circle(screen, (0, 55, 120), pos, 10, 0)# display programpg.display.update()

2.3.完整代码

# import pygame, math and random
import pygame as pg
import math, random# init program
pg.init()
screen = pg.display.set_mode((1000, 800))
pg.display.set_caption("Code5-2-4_pygame_WaterWave", "2.0")# pos
pos = [0, 600]
# waveX
waveX = 0
# waveY
waveY = 0
# y
y = 1# check loop and fps
fps = pg.time.Clock()
while True:# fps tickfps.tick(60)# check quitevent = pg.event.poll()if event.type == pg.QUIT:pg.quit()exit()# fill screenscreen.fill((255, 255, 255))waveX += random.uniform(0.05, 0.1) # random.uniform is used for decimal representation # switch thinking again!waveY += yif waveY == -5:y = 1 # speed changeif waveY == 200:y = -1 # speed change# drawfor i in range(250):# posX changepos[0] = 4 * i# posY changefor j in range(50):# use math.sinpos[1] = 10 * j + 600 + waveY * math.sin(i / 40 + waveX)# draw circlespg.draw.circle(screen, (0, 55, 120), pos, 10, 0)# display programpg.display.update()

三、总结

你们觉得python好用吗？我觉得挺好用的。

作为一个初级编程学习者，python适用于任何人。

我认为，大家可以多多编程。同时增长知识。

大家高考加油！一起度过疫情难关！

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python-pygame作品之“人间”大炮和海浪

一、“人间”大炮

1.1.提前准备

1.2.开始编写

1.3.知识分解

1.3.1.认识math.sin和math.cos

1.3.2.认识pygame.mixer和pygame.transform

1.3.3.开关思维

1.3.4.part

1.4.完整代码

二、海浪

2.1.提前准备

2.2.开始编写

2.3.完整代码

三、总结

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