drawing with the mouse with turtle...solved?

[Steven D'Aprano]

On Sat, 13 Nov 2010 09:10:41 -0500, Brian Blais wrote:

> Here is code that "works", with at least one small oddity:
> 
> import turtle
> 
> def gothere(event):
>     turtle.penup()
>     turtle.goto(event.x-360,340-event.y)
>     turtle.pendown()
> 
> def movearound(event):
>     turtle.goto(event.x-360,340-event.y)
[...]
> the oddity is that the coordinate transformations, x-360 and 340-y, are
> done by eye and do not seem to be related to any of the coordinate
> values I could find.  my screen size is 300x400, the x and y canvas
> scales are 1 and 1, but if I try to transform with those numbers the
> mouse is clearly off.

Have you set the coordinates of the screen?

screen.setworldcoordinates

What do turtle.window_height() and turtle.window_width() return?



-- 
Steven