""" 这是用Python的海龟画图模块和pymunk模块制作的愤怒的小鸟简单版本程序。
physicbox是我编写的一个模块，它有PhysicBall类用来生成物理角色。
还设计了StaticPhysicBox类用来生成静止的盒子角色。
"""
import math
import pymunk # 导入pymunk模块
import turtle # 导入海龟模块，用它来渲染刚体
import random
import physicbox
def display_xy(event):
"""朝向鼠标指针"""
x = event.x - screen.window_width()/2 #转换成海龟坐标系中的x坐标
y = screen.window_height()/2 - event.y #转换成海龟坐标系中的y坐标
screen.title(str(x) + "," + str(y) + "turtle_pymunk愤怒的小鸟原型程序")
def calculate_force():
"""计算拉力值"""
dx = (fixed_position[0] - virtual_ball.xcor()) # 算出水平位移
dy = (fixed_position[1] - virtual_ball.ycor()) # 算出垂直位移
if int(dx) == 0 : dx = random.choice([-0.1,0.1])
# 向量操作
length = math.sqrt( dx**2 + dy**2 )
# 向量标准化
dx = dx /length
dy = dy /length
force = dx*20000 , dy *20000 # 方向向量，此处用来代表力的大小和方向
return force
def draw_line(x,y):
"""画线"""
draw_line_turtle.clear()
draw_line_turtle.pendown()
draw_line_turtle.goto(x,y)
draw_line_turtle.penup()
draw_line_turtle.goto(fixed_position)
virtual_ball.goto(x,y)
force = calculate_force() # 计算力
dx,dy = force[0]/500 ,force[1]/500
#print(dx,dy)
parabolic_points.clear() # 抛物线上的点坐标
x , y = fixed_position
for i in range(30): # 画的点的个数
x = x + dx
y = y + dy
dy = dy + gravity_y /100 # 垂直速度不断变小
parabolic_points.append((round(x),round(y)))
#print(parabolic_points)
# 画抛物线
def draw_parabola():
global parabolic_points
if parabolic_points:
draw_parabola_turtle.clear()
draw_parabola_turtle.clearstamps() # 清除所有图章
for point in parabolic_points: # 在每个坐标点盖个图章
draw_parabola_turtle.goto(point)
draw_parabola_turtle.stamp()
draw_parabola_turtle.clear()
draw_parabola_turtle.clearstamps() # 清除所有图章
screen.update()
screen.ontimer(draw_parabola,100)
def shoot(x,y):
virtual_ball.ondrag(None) # 取消虚拟球的拖曳事件
force = calculate_force() # 计算力
if virtual_ball.distance(draw_line_turtle)>0: # 如果到物理球的距离大于或等于球的直径，则认为是碰到了
virtual_ball.ht() # 虚拟球隐藏
ball.body.force = force # 给力
# 延时擦除
time_counter = 0
def delay_clear():
nonlocal time_counter
if time_counter < 1 :
time_counter += 1
screen.ontimer(delay_clear,1000)
else:
draw_line_turtle.clear() # 发射时清除皮筋
draw_parabola_turtle.clearstamps() # 清除抛物线
parabolic_points.clear()
delay_clear()
parabolic_points = [] # 抛物线上散列点
width,height = 1024,800
screen = turtle.Screen() # 新建海龟窗口，用于渲染形状的
screen.delay(0)
screen.title("turtle_pymunk愤怒的小鸟原型程序")
screen.setup(width,height)
screen.bgpic("images/bg.png")
screen.addshape("images/bird.gif") # 50 x 50
screen.addshape("images/platform.gif") # 168 x 166
screen.addshape("images/wood1.gif") # 406 x 38
screen.addshape("images/wood2.gif") # 166 x 82
screen.addshape("images/ground.gif") # 1024x250
screen.addshape("images/verticle1.gif") # 96x408
screen.addshape("images/verticle2.gif") # 96x351
screen.addshape("images/verticle3.gif") # 96x314
screen.addshape("images/verticle4.gif") # 96x269
screen.addshape("images/verticle5.gif") # 96x210
screen.addshape("images/verticle6.gif") # 96x114
screen.addshape("images/pig.gif") # 102x92
# 新建重力空间
space = pymunk.Space() # 设定重力空间
gravity_y = -100
space.gravity = 0,gravity_y # 设置重力参数
# 新建静止的平台,参数为：重力空间，gif图形，图形宽高,坐标，用于放要发射的球
px,py = -400,-300
ball_platform = physicbox.StaticPhysicBox(space,"images/platform.gif",(168,166),(px,py))
fixed_position = ball_position = (px, py+166/2+50/2) # 平台中心点y坐 + 平台高度/2 + 球高度/2，这样球刚好在平台上
ball = physicbox.PhysicBall(space,"images/bird.gif",ball_position,25) # 25是半径
# 画皮筋要用到的海龟对象
draw_line_turtle = turtle.Turtle(visible=False)
draw_line_turtle.penup()
draw_line_turtle.goto(0,300)
draw_line_turtle.color("gray")
draw_line_turtle.write("按空格键重置",align='center',font=("黑体",32,"normal"))
draw_line_turtle.goto(ball_position)
draw_line_turtle.pensize(5)
draw_line_turtle.color("orange")
# 画抛物线要用到的海龟对象
draw_parabola_turtle = turtle.Turtle(visible=False,shape='circle')
draw_parabola_turtle.shapesize(0.5,0.5)
draw_parabola_turtle.penup()
draw_parabola_turtle.color("magenta")
# 虚拟球用来显示拉的时候的球，并不是真正发射的球
virtual_ball = turtle.Turtle("images/bird.gif",visible=False)
virtual_ball.penup()
virtual_ball.goto(fixed_position)
virtual_ball.st()
virtual_ball.ondrag(draw_line)
virtual_ball.onrelease(shoot)
balls = []
balls.append(ball)
# 小猪
pig1 = ball_platform = physicbox.PhysicBall(space,"images/pig.gif",(360,270),25)
balls.append(pig1)
# 最下面的横木
wood1 = physicbox.StaticPhysicBox(space,"images/wood1.gif",(406,38),(250, -200))
# 竖立的木
verticle1 = physicbox.StaticPhysicBox(space,"images/verticle1.gif",(96,408),( 360, 20))
screen.cv.bind("<Motion>",display_xy) # 绑定鼠标移动事件
def reset_ball():
"""重置待发射的小球"""
ball.reborn()
virtual_ball.goto(fixed_position)
virtual_ball.ondrag(draw_line)
virtual_ball.st()
screen.onkey(reset_ball,"space") # 按空格键重置小球
screen.listen()
draw_parabola() # 画抛物线
while True:
space.step(0.02) # 把空间中的弹球按重力原理等进行坐标等的更新
for b in balls:
b.turtle.goto(b.body.position)
screen.update()
