Python：在画布中的两点之间画线

Question

我无法从 2 个点创建一条直线。据我了解，点坐标是由原点计算的。原点位于画布的中间。我只画了画布。有人有解决办法吗？
测试：
can = Canvas(31, 11, "+")
l = Line(0, 5, 0, -5)
can.draw(l, "L")
can.display()
一定是：
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class Canvas():
    def __init__(self, width, height, background = " "):
        """Constructor for the Canvas class
        """

    def display(self):
        """
        Printing method for the canvas. When triggered outputs the canvas as characters.
        Example outputs are given in the test cases. White spaces may be used as you prefer,
        but you must have *at least* one whitespace between every character. 
        """
    def draw(self, toDraw, color="A"):
        """
        When given a Line draw all points on the Line. We are currently working with an approximation.
        Any point with an euclidian distance to the line of less than or equal 0.7 is drawn.
        Make sure to clip your lines using the Cohen-Sutherland algortihm.
        After clipping, floor the coordinates of the endpoints

        """
class Line():
    def __init__(self, x1, y1, x2, y2):
        """Constructor for Line
        The first point is (x1, y1), the second point is (x2, y2).
        All coordinates are given as cartesian coordinates.
        """
        self.x1 = x1
        self.x2 = x2
        self.y1 = y1
        self.y2 = y2

Answer 1

看这个：Check is a point (x,y) is between two points drawn on a straight line

检查点是否在线，但不会显示任何结果。 计算Hypotenus和连接点和线顶点的2条线之和的差异。

d = lambda p1,p2: ((p1[0]-p2[0])**2 + (p1[1]-p2[1])**2)**.5 #Distance beetwin 2 poins
on = lambda pf,pt,point: d(pf,pt) - (d(pf,point)+d(pt,point)) #difference between hypotenus and 2 lines ...

def draw(points, w=10, h=10):
    '''
    This is not the optimized one, it just check all points 
    '''
    l = [[(1 if (x,y) in points else 0) for y in range(h)] for x in range(w)] #1=point
    print('\n'.join([' '.join([('.' if x else '0') for x in y]) for y in l]))

r = 0.1 #This will set the presition of your line
points = [(x,y) for x in range(10) for y in range(10) if abs(on(p1,p2,(x,y)))<0.1]

当 r = 0.01

0 . 0 0 0 0 0 0 0 0
0 0 . 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 . 0 0 0
0 0 0 0 0 0 0 . 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0

当 r = 0.1

0 . 0 0 0 0 0 0 0 0
0 0 . . 0 0 0 0 0 0
0 0 0 . . 0 0 0 0 0
0 0 0 0 . . 0 0 0 0
0 0 0 0 0 . . 0 0 0
0 0 0 0 0 0 0 . 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0