cousera_Mini-project # 4 - Pong

《An Introduction to Interactive Programming in Python》

**小游戏~”Pong”
这次时间还是挺充裕的,但是看英文看的头大,就没按步骤写了
结果花了更多的时间 还写错了一些
下次还是认真按步骤写好了

我做的:
ico_topitme

改作业改到一个做的好有创意: 评语评了一句碉堡了
不知道看懂看不懂 哈哈
ico_topitme

可以在codeskullptor上运行
code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
# Implementation of classic arcade game Pong

import simplegui
import random

# initialize globals - pos and vel encode vertical info for paddles
WIDTH = 600
HEIGHT = 400
BALL_RADIUS = 20
PAD_WIDTH = 8
PAD_HEIGHT = 80
HALF_PAD_WIDTH = PAD_WIDTH / 2
HALF_PAD_HEIGHT = PAD_HEIGHT / 2
LEFT = False
RIGHT = True

# initialize ball_pos and ball_vel for new bal in middle of table
# if direction is RIGHT, the ball's velocity is upper right, else upper left
def spawn_ball(direction):
global ball_pos, ball_vel # these are vectors stored as lists
ball_pos = [WIDTH/2, HEIGHT/2]
ball_vel = [random.randrange(1, 2)*2, random.randrange(-2, 2)+0.5]
if(direction == "LEFT"): ball_vel[0] = -ball_vel[0]

# define event handlers
def new_game():
global paddle1_pos, paddle2_pos, paddle1_vel, paddle2_vel # these are numbers
paddle1_pos = [HALF_PAD_WIDTH, HEIGHT / 2]
paddle2_pos = [WIDTH - HALF_PAD_WIDTH, HEIGHT / 2]
global score1, score2 # these are ints
score1 = 0
score2 = 0
paddle2_vel = 0
paddle1_vel = 0
spawn_ball(random.choice(["LEFT", "RIGHT"]))

def draw(canvas):
global score1, score2, paddle1_pos, paddle2_pos, ball_pos, ball_vel
global paddle2_vel, paddle1_vel


# draw mid line and gutters
canvas.draw_line([WIDTH / 2, 0],[WIDTH / 2, HEIGHT], 1, "White")
canvas.draw_line([PAD_WIDTH, 0],[PAD_WIDTH, HEIGHT], 1, "White")
canvas.draw_line([WIDTH - PAD_WIDTH, 0],[WIDTH - PAD_WIDTH, HEIGHT], 1, "White")

# update ball
ball_pos[0] += ball_vel[0]
ball_pos[1] += ball_vel[1]

# draw ball
canvas.draw_circle(ball_pos, BALL_RADIUS, 2, "Red", "White")

# update paddle's vertical position, keep paddle on the screen
if(ball_pos[1] + BALL_RADIUS >= HEIGHT or ball_pos[1] - BALL_RADIUS <= 0):
ball_vel[1] = -ball_vel[1]

# draw paddles
canvas.draw_polyline([[HALF_PAD_WIDTH, paddle1_pos[1]-HALF_PAD_HEIGHT],
[HALF_PAD_WIDTH, paddle1_pos[1]+HALF_PAD_HEIGHT]],
PAD_WIDTH, 'Red')
paddle1_pos[1] += paddle1_vel

canvas.draw_polyline([[WIDTH - HALF_PAD_WIDTH, paddle2_pos[1]-HALF_PAD_HEIGHT],
[WIDTH - HALF_PAD_WIDTH, paddle2_pos[1]+HALF_PAD_HEIGHT]],
PAD_WIDTH, 'Red')
paddle2_pos[1] += paddle2_vel

if paddle1_pos[1] + HALF_PAD_HEIGHT >= HEIGHT:
paddle1_pos[1] = HEIGHT - HALF_PAD_HEIGHT
paddle1_vel = 0
if paddle1_pos[1] - HALF_PAD_HEIGHT <= 0:
paddle1_pos[1] = HALF_PAD_HEIGHT
paddle1_vel = 0

if paddle2_pos[1] + HALF_PAD_HEIGHT >= HEIGHT:
paddle2_pos[1] = HEIGHT - HALF_PAD_HEIGHT
paddle2_vel = 0
if paddle2_pos[1] - HALF_PAD_HEIGHT <= 0:
paddle2_pos[1] = HALF_PAD_HEIGHT
paddle2_vel = 0

if(ball_pos[1] < paddle1_pos[1] + HALF_PAD_HEIGHT and
ball_pos[1] > paddle1_pos[1] - HALF_PAD_HEIGHT and
ball_pos[0] <= BALL_RADIUS + PAD_WIDTH):
ball_vel[0] = -ball_vel[0]
ball_vel[0] *= 1.2
ball_vel[1] *= 1.2
elif(ball_pos[0] < -1*BALL_RADIUS):
score2 += 1
spawn_ball(random.choice(["LEFT", "RIGHT"]))

if(ball_pos[1] < paddle2_pos[1] + HALF_PAD_HEIGHT and
ball_pos[1] > paddle2_pos[1] - HALF_PAD_HEIGHT and
ball_pos[0] >= WIDTH - BALL_RADIUS - PAD_WIDTH):

ball_vel[0] = -ball_vel[0]
ball_vel[0] *= 1.2
ball_vel[1] *= 1.2
elif(ball_pos[0] >= WIDTH + BALL_RADIUS):
score1 += 1
spawn_ball(random.choice(["LEFT", "RIGHT"]))
# draw scores
canvas.draw_text(str(score1), [50, 50], 50, 'Blue', 'serif')
canvas.draw_text(str(score2), [500, 50], 50, 'Blue', 'serif')

def keydown(key):
global paddle1_vel, paddle2_vel
acc = 1
if key==simplegui.KEY_MAP["s"]:
paddle1_vel += acc
elif key==simplegui.KEY_MAP["w"]:
paddle1_vel -= acc
elif key==simplegui.KEY_MAP["down"]:
paddle2_vel += acc
elif key==simplegui.KEY_MAP["up"]:
paddle2_vel -= acc

def keyup(key):
global paddle1_vel, paddle2_vel

def button_handler():
new_game()

# create frame
frame = simplegui.create_frame("Pong", WIDTH, HEIGHT)
frame.set_draw_handler(draw)
frame.set_keydown_handler(keydown)
frame.set_keyup_handler(keyup)
frame.add_button('Reset', button_handler, 60)

# start frame
new_game()
frame.start()