The controller
Some features of the program can be controlled via an external controller
that is plugged into the GeekPort on a BeBox-computer (at the moment
it is not certain how such controllers could be made to work on Mac-clones).
The controller contains four sliders that control the line-width/spray-radius
and Red, Green and Blue elements of current colour. These kinds of controllers
are not available from shops but one can easily be made from standard
electrical components. Note that the only way to calibrate the software
for the controller is to make changes in the soure code (this will be changed
soon). Also due to the nature of GeekPort the different sliders affect a
little bit to other sliders (this also could be dealt in sofware but it
is not yet implemented). If the calibration is off there can be some strange effects
when the values "go over".
Here is a diagram for those who would like to make such controller.