Re: [Edu-sig] odd drawing problem with turtle.py

[Brian Blais]

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:

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>  
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
http://web.bryant.edu/~bblais
http://bblais.blogspot.com/



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--
Brian Blais
bbl...@bryant.edu
http://web.bryant.edu/~bblais
http://bblais.blogspot.com/



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