Python利用物理引擎Pymunk编写一个解压小游戏
用鼠标创建小球，一个蹦来蹦去的解压小游戏……
本次需要的外置包：pygame，pymunk，cmd运行该命令安装：
pip install pygame
pip install pymunk
首先，导入
import pymunk
import pygame
from pygame.locals import *
import sys
import random as rd
结合pygame，创建若干障碍，并设置重力、弹跳力等参数
class Demo:
WIDTH=800
HEIGHT=800
def __init__(self):
pygame.init()
self.screen=pygame.display.set_mode((self.WIDTH,self.HEIGHT))
pygame.display.set_caption("BALLS!")
self.balls=[]
self.space=pymunk.Space()
self.space.gravity=(0,280)
self.elasticity=0.9
self.segment_1_pos=((0,self.HEIGHT-125),(self.WIDTH,self.HEIGHT-65))
self.segment_1_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.segment_1_shape=pymunk.Segment(self.segment_1_body,self.segment_1_pos[0],self.segment_1_pos[1],10)
self.segment_1_shape.elasticity=self.elasticity
self.space.add(self.segment_1_body,self.segment_1_shape)
self.segment_2_pos=((0,self.HEIGHT-500),(150,self.HEIGHT-400))
self.segment_2_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.segment_2_shape=pymunk.Segment(self.segment_2_body,self.segment_2_pos[0],self.segment_2_pos[1],10)
self.segment_2_shape.elasticity=self.elasticity
self.space.add(self.segment_2_body,self.segment_2_shape)
self.segment_3_pos=((self.WIDTH,self.HEIGHT-500),(self.WIDTH-150,self.HEIGHT-400))
self.segment_3_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.segment_3_shape=pymunk.Segment(self.segment_3_body,self.segment_3_pos[0],self.segment_3_pos[1],10)
self.segment_3_shape.elasticity=self.elasticity
self.space.add(self.segment_3_body,self.segment_3_shape)
self.circle_1_pos=(self.WIDTH/2,self.HEIGHT/2)
self.circle_1_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.circle_1_shape=pymunk.Circle(self.circle_1_body,30,self.circle_1_pos)
self.circle_1_shape.elasticity=self.elasticity
self.space.add(self.circle_1_body,self.circle_1_shape)
写一个自动创建新球的函数
def newBall(self,x,y,r):
body=pymunk.Body(1,100,body_type=pymunk.Body.DYNAMIC)
body.position=x,y
shape=pymunk.Circle(body,r)
shape.elasticity=self.elasticity
self.space.add(body,shape)
self.balls.append((shape,r))
事件监听
def listen(self):
for event in pygame.event.get():
if event.type==QUIT:
sys.exit()
if event.type==MOUSEBUTTONDOWN:
self.newBall(*pygame.mouse.get_pos(),rd.randint(5,10))
绘制并检测物体跳出边界并删除
def draw(self):
self.screen.fill((255,255,255))
pygame.draw.line(self.screen,(0,0,0),self.segment_1_pos[0],self.segment_1_pos[1],10)
pygame.draw.line(self.screen,(0,0,0),self.segment_2_pos[0],self.segment_2_pos[1],10)
pygame.draw.line(self.screen,(0,0,0),self.segment_3_pos[0],self.segment_3_pos[1],10)
pygame.draw.circle(self.screen,(0,0,0),self.circle_1_pos,30)
for ball,r in self.balls:
pygame.draw.circle(self.screen,(255,0,0),(ball.body.position.x,ball.body.position.y),r)
c=0
while c<len(self.balls) and len(self.balls):
x,y=self.balls[c][0].body.position
if x<0 or x>self.WIDTH or y>self.HEIGHT:
self.space.remove(self.balls[c][0])
self.balls.pop(c)
c-=1
c+=1
主循环
def run(self):
while True:
self.listen()
self.draw()
self.space.step(0.001)
pygame.display.update()
启动
if __name__ == '__main__':
demo=Demo()
demo.run()
最终代码
import pymunk
import pygame
from pygame.locals import *
import sys
import random as rd
class Demo:
WIDTH=800
HEIGHT=800
def __init__(self):
pygame.init()
self.screen=pygame.display.set_mode((self.WIDTH,self.HEIGHT))
pygame.display.set_caption("BALLS!")
self.balls=[]
self.space=pymunk.Space()
self.space.gravity=(0,280)
self.elasticity=0.9
self.segment_1_pos=((0,self.HEIGHT-125),(self.WIDTH,self.HEIGHT-65))
self.segment_1_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.segment_1_shape=pymunk.Segment(self.segment_1_body,self.segment_1_pos[0],self.segment_1_pos[1],10)
self.segment_1_shape.elasticity=self.elasticity
self.space.add(self.segment_1_body,self.segment_1_shape)
self.segment_2_pos=((0,self.HEIGHT-500),(150,self.HEIGHT-400))
self.segment_2_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.segment_2_shape=pymunk.Segment(self.segment_2_body,self.segment_2_pos[0],self.segment_2_pos[1],10)
self.segment_2_shape.elasticity=self.elasticity
self.space.add(self.segment_2_body,self.segment_2_shape)
self.segment_3_pos=((self.WIDTH,self.HEIGHT-500),(self.WIDTH-150,self.HEIGHT-400))
self.segment_3_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.segment_3_shape=pymunk.Segment(self.segment_3_body,self.segment_3_pos[0],self.segment_3_pos[1],10)
self.segment_3_shape.elasticity=self.elasticity
self.space.add(self.segment_3_body,self.segment_3_shape)
self.circle_1_pos=(self.WIDTH/2,self.HEIGHT/2)
self.circle_1_body=pymunk.Body(body_type=pymunk.Body.STATIC)
self.circle_1_shape=pymunk.Circle(self.circle_1_body,30,self.circle_1_pos)
self.circle_1_shape.elasticity=self.elasticity
self.space.add(self.circle_1_body,self.circle_1_shape)
def newBall(self,x,y,r):
body=pymunk.Body(1,100,body_type=pymunk.Body.DYNAMIC)
body.position=x,y
shape=pymunk.Circle(body,r)
shape.elasticity=self.elasticity
self.space.add(body,shape)
self.balls.append((shape,r))
def listen(self):
for event in pygame.event.get():
if event.type==QUIT:
sys.exit()
if event.type==MOUSEBUTTONDOWN:
self.newBall(*pygame.mouse.get_pos(),rd.randint(5,10))
def draw(self):
self.screen.fill((255,255,255))
pygame.draw.line(self.screen,(0,0,0),self.segment_1_pos[0],self.segment_1_pos[1],10)
pygame.draw.line(self.screen,(0,0,0),self.segment_2_pos[0],self.segment_2_pos[1],10)
pygame.draw.line(self.screen,(0,0,0),self.segment_3_pos[0],self.segment_3_pos[1],10)
pygame.draw.circle(self.screen,(0,0,0),self.circle_1_pos,30)
for ball,r in self.balls:
pygame.draw.circle(self.screen,(255,0,0),(ball.body.position.x,ball.body.position.y),r)
c=0
while c<len(self.balls) and len(self.balls):
x,y=self.balls[c][0].body.position
if x<0 or x>self.WIDTH or y>self.HEIGHT:
self.space.remove(self.balls[c][0])
self.balls.pop(c)
c-=1
c+=1
def run(self):
while True:
self.listen()
self.draw()
self.space.step(0.001)
pygame.display.update()
if __name__ == '__main__':
demo=Demo()
demo.run()
现在，启动程序，移动你的鼠标，点击鼠标创建一个个不同大小的球吧！
（p.s. 滑动滚轮也可以哟~~~）
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