Python 如何使用两点的 x 和 y 坐标绘制一条线？
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How can draw a line using the x and y coordinates of two points?
提问by RezaOptic
I would like to know how to draw a line using the x and y coordinates of two 2-dimensional points. I tried the turtle graphics, but it works using degrees.
我想知道如何使用两个二维点的 x 和 y 坐标绘制一条线。我尝试了海龟图形，但它使用度数工作。
采纳答案by Nick
You could make use of pygame depending on what you are doing it for as it allows a similar:
您可以根据您的用途使用 pygame，因为它允许类似的：
line(Surface, color, (x1,y1), (x2,y2), width)
For Example, when the environment has been set up:
例如，当环境已经设置好时：
pygame.draw.line(screen, (255,0,255), (20,20), (70,80), 2)
can draw:
可以画：
回答by Rob S.
You could calculate the angle from the 4 points using the following formula
您可以使用以下公式从 4 个点计算角度
angle = arctan((y2-y1)/(x2-x1))
Just a warning, depending on the math library you use, this will probably output in radians. However you can convert radians to degrees using the following formula.
只是一个警告，根据您使用的数学库，这可能会以弧度输出。但是，您可以使用以下公式将弧度转换为度数。
deg = rad * (180/pi)
回答by efirvida
Depending of your needs for plotting you can use matplotlib
根据您的绘图需要，您可以使用matplotlib
import matplotlib.pyplot as plt
plt.plot([x1,x2],[y1,y2])
plt.show()
回答by volent
If you are already using turtleyou can use a Tkintercanva :
如果您已经在使用turtle，则可以使用Tkinter画布：
import Tkinter
x1, y1, x2, y2 = 10, 20, 30, 40
window = Tkinter.Tk()
canva = Tkinter.Canvas(window)
line = canva.create_line(x1, y1, x2, y2)
canva.pack()
回答by cdlane
I tried the turtle graphics, but it works using degrees.
我尝试了海龟图形，但它使用度数工作。
Your premise doesn't hold -- turtle can do it, no degrees needed:
你的前提不成立——乌龟可以做到，不需要学位：
import turtle
point1 = (50, 100)
point2 = (150, 200)
turtle.penup()
turtle.goto(point1)
turtle.pendown()
turtle.goto(point2)
turtle.hideturtle()
turtle.exitonclick()
回答by Steschu
Just for completeness, you can also use the ImageDraw module of Pillow(Python Image Library / PIL fork). That way you don't need a window and you can save the drawn image into a file instead.
为了完整起见，您还可以使用Pillow的ImageDraw 模块（Python Image Library / PIL fork）。这样您就不需要窗口，而是可以将绘制的图像保存到文件中。
from PIL import Image, ImageDraw
im = Image.new('RGB', (100, 100))
draw = ImageDraw.Draw(im)
draw.line((0, 0) + im.size, fill=128)
draw.line((0, im.size[1], im.size[0], 0), fill=128)
im.save('test.png')
