Brian Blais wrote:
On Jan 31, 2010, at 23:05 , John Posner wrote:
Try commenting out this statement:
self.turtle.tracer(False)
That helps on Python 2.6.4.
interesting. It seems as if the tracer property is a global one:
Actually, the tracer method that does the work is part of the
TurtleScreen class, and individual Turtle instances just access the
tracer method of the TurtleScreen they inhabit... if that makes sense.
So since your turtles are on the same screen, yes, in effect, tracer is
sort of global.
Cheers,
Vern
In [1]:t1=Turtle()
In [2]:t1.tracer()
Out[2]:1
In [3]:t1.tracer(False)
In [4]:t1.tracer()
Out[4]:0
In [5]:t2=Turtle()
In [6]:t2.tracer()
Out[6]:0
In [7]:t2.tracer(True)
In [8]:t1.tracer()
Out[8]:1
looks like I need to set the tracer manually.
however, even if the tracer is off, shouldn't it still draw the line?
when I put in the T.tracer(True) it works, but I shouldn't need to I think.
On Jan 31, 2010, at 21:11 , kirby urner wrote:
I don't see where you've defined a Turtle class to instantiate sir.
Turtle is given in turtle.py. I should have subclassed it, but I was
being lazy. :)
thanks for the fast replies!
bb
On Sun, Jan 31, 2010 at 4:27 PM, Brian Blais <bbl...@bryant.edu
<mailto:bbl...@bryant.edu>> wrote:
I'm on Python 2.5, but using the updated turtle.py Version 1.0.1 - 24. 9.
2009. The following script draws 5 circles, which it is supposed to, but
then doesn't draw the second turtle which is supposed to simply move
forward. Any ideas?
from turtle import *
from numpy.random import randint
resetscreen()
class Circle(object):
def __init__(self,x,y,r,color):
self.x=x
self.y=y
self.r=r
self.color=color
self.turtle=Turtle(visible=False)
self.turtle.tracer(False)
self.draw()
def draw(self):
self.turtle.penup()
self.turtle.setposition(self.x,self.y)
self.turtle.setheading(0)
self.turtle.backward(self.r)
self.turtle.pendown()
self.turtle.fill(True)
self.turtle.pencolor("black")
self.turtle.fillcolor(self.color)
self.turtle.circle(self.r)
self.turtle.fill(False)
self.turtle.penup()
for i in range(5):
c=Circle(randint(-350,350),randint(-250,250),10,"red")
T=Turtle()
T.forward(100)
T.forward(100)
thanks,
bb
--
Brian Blais
bbl...@bryant.edu <mailto:bbl...@bryant.edu>
http://web.bryant.edu/~bblais
http://bblais.blogspot.com/
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Brian Blais
bbl...@bryant.edu <mailto:bbl...@bryant.edu>
http://web.bryant.edu/~bblais
http://bblais.blogspot.com/
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vce...@canterburyschool.org; 260-436-0746; FAX: 260-436-5137
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