takluyver / mobilechelonian

Turtles on a notebook
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Cornered turtle #15

Open reuschp opened 5 years ago

reuschp commented 5 years ago

Hi guys,

I observed a problem with the title in the corner. Moving the turtle closer and closer to the wall results in unpredictable movements. In the following example I expected three parallel lines - but the closer I move the turtle towards the edge of the drawing board, the higher an angle of error I receive.

image

What makes it even strange - and even more unpredictable - is the fact, that these unexpected angles CHANGE, when I change the length of the forward move. In the next example I reduced the forward-movement to 20 steps - an receive a 45 degree error in the drawing of the line starting at (0,0).

image

Any ideas on this? Can you solve this - or explain, what should be done in order to circumvent this problem?

Regards Pascal