Hardware Reference
In-Depth Information
the irst time after the program starts you are asked for a name to preix the picture ile. You
have to click the Python shell console window to give it the focus and type in a name. he
program will then use that name for all subsequent screen saves and append a number on
the end of each new ile. After you have entered the name, you should click back on the
sketch window so that it can process subsequent keys. If there is not a
roto-sketch
direc-
tory, one will be created. Now when you press the Home key again, the ilename is printed
out, but there is no need to enter anything; it uses the name you gave it last time plus an
incrementing number. he hash key (#) transfers the new images in the
roto-sketch
folder out to Flickr, which can take from 10 seconds to just over a minute depending on the
state of your Internet connection and traic at the Flickr site.
Many interesting patterns can be drawn with this machine, a few of which are shown in
Figure 15-7. You can save the pattern as you go, seeing it get increasingly complex.
Figure 15-7:
Some of the
pattern efects
you can achieve.
Creating a Symmetrical Pattern
Consider one extra variant - symmetry. he output can be made more interesting by the use
of relections to generate a symmetrical pattern rather like a kaleidoscope. here are two
ways you can do this: he irst is by rotation of the points used to draw the pattern, and the
second is by copying what is actually drawn and placing it in several places on the screen. At
