Bugs item #1528363, was opened at 2006-07-25 20:52
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Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: NatureMage (naturemage)
Assigned to: Nobody/Anonymous (nobody)
Summary: forward in turtle module may cause incorrect display
Initial Comment:
Use forward() in the turtle module to draw
horizontally from right to left, if the starting
position's x and y coordinates are different from the
origin, the line may not appear straight. But if the
tk window is redrawn, for example minimized and then
restored, the line will be properly displayed.
The following code will reproduce this issue:
# start
from turtle import *
from Tkinter import *
color("maroon")
up()
goto(30, 30)
down()
left(180)
forward(100)
mainloop()
# end
I checked the source of the turtle module, but failed
to figure out the reason. The attatchment contains a
snapshot of what happens.
My environment:
Python version: 2.4.3
OS: Windows XP sp2
Video Card: Nvidia 6600
CPU: P4 2.66G Hz
Mem: 1G
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