使用 Python 乌龟图形的十四段显示

Question

这是我的任务：http://cs.nyu.edu/courses/summer11/V22.0002-002/assign6_summer2011.html

到目前为止，我已经写了以下内容：

from turtle import *

s = input(Type in a string: )

Characters = {
    ('A') : MethodA
    ('B') : MethodB
    ('C') : MethodC
    ('D') : MethodD
    ('E') : MethodE
    ('F') : MethodF
    ('G') : MethodG
    ('H') : MethodH
    ('I') : MethodI
    ('J') : MethodJ
    ('K') : MethodK

for c in s:
    c = c.upper() # to fold lowercase into upper case
    if c in Characters:
        Characters[c](width)

def top_stroke():
    forward(10)
    penup()



def MethodA (width) :
top_stroke(width)    
middle_stroke(width) 
left_stroke
right_stroke(width)

def MethodB (width) :
top_stroke(width)    
middle_stroke(width) 
left_stroke(width)
right_stroke(width)


def MethodC (width) :
top_stroke(width)    
middle_stroke(width) 
left_stroke(widt)
right_stroke(width)

我的问题是我不确定如何绘制每个笔画。我知道我必须插入它将如何绘制每个字母和数字，但我在正确的轨道上吗？任何人都可以帮助我画top_stroke 让我开始吗？感谢您提供的任何帮助。

Answer 1

六年多之后，这个问题值得回答。有点。代替实现 14 段字母数字显示，我将使用 7 个七段（十六进制）数字显示来演示基本思想。我将使用seven segment display article in Wikipedia 中的约定。另外，我将定义一个自定义海龟光标，而不是绘制段，并根据需要标记它：

from turtle import Screen, Turtle

SCALE = 1.75  # arbitrarily scale digits larger or smaller

CURSOR_SIZE = 25  # maximum dimension of our custom turtle cursor

SPACING = CURSOR_SIZE * 1.25 * SCALE  # space from start of one digit to the next

DIGITS = {  # which segments to turn on encoded as bits
    '0': 0x7E,
    '1': 0x30,
    '2': 0x6D,
    '3': 0x79,
    '4': 0x33,
    '5': 0x5B,
    '6': 0x5F,
    '7': 0x70,
    '8': 0x7F,
    '9': 0x7B,
    'A': 0x77,
    'B': 0x1F,
    'C': 0x4E,
    'D': 0x3D,
    'E': 0x4F,
    'F': 0x47,
}

def display_number(turtle, number):
    for digit in str(number):
        bits = DIGITS[digit]

        for bit in range(7):
            if 2 ** bit & bits:
                position = turtle.position()
                segments[bit](turtle)
                turtle.stamp()
                turtle.setheading(0)
                turtle.setposition(position)

        turtle.forward(SPACING)

def segment_A(turtle):  # top
    turtle.setheading(90)
    turtle.sety(turtle.ycor() + 20 * SCALE)

def segment_B(turtle):  # right upper
    turtle.setposition(turtle.xcor() + 10 * SCALE, turtle.ycor() + 10 * SCALE)

def segment_C(turtle):  # right lower
    turtle.setposition(turtle.xcor() + 10 * SCALE, turtle.ycor() - 10 * SCALE)

def segment_D(turtle):  # bottom
    turtle.setheading(90)
    turtle.sety(turtle.ycor() - 20 * SCALE)

def segment_E(turtle):  # left lower
    turtle.setposition(turtle.xcor() - 10 * SCALE, turtle.ycor() - 10 * SCALE)

def segment_F(turtle):  # left upper
    turtle.setposition(turtle.xcor() - 10 * SCALE, turtle.ycor() + 10 * SCALE)

def segment_G(turtle):  # center
    turtle.setheading(90)

segments = [segment_G, segment_F, segment_E, segment_D, segment_C, segment_B, segment_A]

screen = Screen()
screen.setup(950, 200)
screen.register_shape('segment', ((-12.5, 0), (-10, 2.5), (10, 2.5), (12.5, 0), (10, -2.5), (-10, -2.5)))  # <=>

turtle = Turtle('segment', visible=False)
turtle.shapesize(SCALE)
turtle.speed('fastest')
turtle.penup()

turtle.setx(SPACING - screen.window_width() / 2)

display_number(turtle, "0123456789ABCDEF")

screen.exitonclick()

将段数增加到14，使文本多行打印，添加小数点，都留给读者练习。