Статья Автор: Пашкина Анна

сетка

import turtle as tr
def dot_otnoshenie(A,B,K):
    xy = []
    for i in range(len(A)):
        xy.append((A[i]*K[1] + B[i]*K[0])/(K[0]+K[1]))
    return xy
def punctir(A,B,t,dl=0):
    t.up(); t.goto(A)
    if dl==0:
        t.down()
        t.goto(B)
        return
    if dl>0:      
        n = int((((B[0]-A[0])**2+(B[1]-A[1])**2)**0.5)/dl)
    elif dl<0:
        n = abs(dl)*2
    if n%2 == 0: n+=1;
    for i in range(1,n+1):
        if i%2 == 0:
            t.down()
        mn = [i,n-i]
        X = dot_otnoshenie(A,B,mn)
        t.goto(X)
        t.up()
t = tr.Pen()
t.speed(0)
s0, s = (-200,-200), (200,200)
m = 25
xs = s[0] - s0[0]
ys = s[1] - s0[1]
k = 5
t.color('gray')
for i in range((xs//m)+1):
    s0x = [s0[0]+m*i,s0[1]]
    sx = [s0[0]+m*i,s[1]]
    punctir(s0x,sx,t,k)
for g in range((ys//m)+1):
    s0y = [s0[0],s0[1]+m*g]
    sy = [s[0],s0[1]+m*g]
    punctir(s0y,sy,t,k)
o,a,b = (0,0),(3,1),(2,2)
a1 = (a[0]*m,a[1]*m)
b1 = (b[0]*m,b[1]*m)
t.color('blue')
punctir(o,a1,t)
t.color('blue')
punctir(o,b1,t)
c = (a[0]*b[0] - a[1]*b[1],a[0]*b[1] + a[1]*b[0])
c1 = (c[0]*m,c[1]*m)
t.color('red')
punctir(o,c1,t)
tr.done()

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