Turtle onclic doesn't work as expected, moving object that was not clicked

user_7942031 0
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Want to make a ball to change trajectory when I click on it. But in my case when I click on some ball, movement not always happens on the ball that was clicked but on another one. Tried to change place for onclic method, but always the same. print shows that function is called for wrong object. Don't know how to make it right.

import random
import turtle

def my_function(x, y):
  print(x, y)
  xd[index] = -xd[index]
  print (myballs)

window = turtle.Screen()
window.delay(5)
message = turtle.Turtle()
message.hideturtle()
MAXX, MAXY = window.screensize()
BALLSIZE = 1
border = turtle.Turtle()
border.hideturtle()
border.speed(0)
border.up()
border.goto(MAXX, MAXY)
border.down()
border.pensize(1)
border.color('red')
border.goto(MAXX, -MAXY)
border.goto(-MAXX, -MAXY)
border.goto(-MAXX, MAXY)
border.goto(MAXX, MAXY)



balls = []
balls.append(turtle.Turtle())
balls.append(turtle.Turtle())


x = [0] * len(balls)
y = [0] * len(balls)
xd = [0] * len(balls)
yd = [0] * len(balls)
for myballs in balls:
    x, y = random.randint(-MAXX + 1, MAXX - 1), random.randint(-MAXY + 1, MAXY - 1)
    myballs.hideturtle()
    myballs.speed(0)
    myballs.up()
    myballs.shapesize(BALLSIZE)
    myballs.shape('circle')
    myballs.goto(x, y)
    myballs.showturtle()
    index = balls.index(myballs)
    speed = 1
    xd[index] = speed
    yd[index] = speed
    myballs.onclick(my_function)

while True:
    for myballs in balls:


        index = balls.index(myballs)
        x, y = myballs.pos()

        if x+BALLSIZE*10 >= MAXX or x-BALLSIZE*10 <= -MAXX:
            xd[index] = -xd[index]

        if y+BALLSIZE*10 >= MAXY or y-BALLSIZE*10 <= -MAXY:
            yd[index] = -yd[index]


        x = x + xd[index]
        y = y + yd[index]

        myballs.goto(x, y)
python-3.x graphics
1 Answers

First, import math module:

import math

then change your function to this:

def my_function(x, y):
print(x, y)
for i,ball in enumerate(balls):
    ball_x, ball_y = ball.pos()
    if math.hypot(abs(x-ball_x), 
                  abs(y-ball_y)) < BALLSIZE*10:
        xd[i] = -xd[i]
        print(i, ball)
        return
user_138737020
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