Drawbot: added Floyd/Steinberg dithering

A big challenge with the drawbot is that it’s still really hard to use. Wouldn’t it be great if you could just load a picture and click start? Well soon you will.

Here’s the plan:
– load a picture (done)
– make it greyscale (done)
– dither it to a set of points (done)
– connect the dots in a single line aka the traveling salesman problem.
– generate gcode
– send gcode to robot

Here’s a sample of what I’ve got so far:

(Poster by Olly Moss.)

Should I give people the power to change the picture size before starting OR should the picture automatically fit the picture to the drawing area (without stretching)?