Godel Escher Bach QR Code shadow cube
thingiverse
This cube features QR codes on its shadow, pointing to Wikipedia articles of Kurt Godel, M.C. Escher, and J.S. Bach. Only three out of six cube orientations cast a legible shadow due to the limitation of reading QR codes in mirror image. The process involves using reduced-url QR code generator, paint program for connecting sections, Inkscape to convert DXF, and OpenScad for extrusion, rotation, and intersection of images. OpenScad took nearly 30 minutes on a fast computer for rendering. QR codes are resilient due to their parity and redundancy schemes, allowing moderate modifications. The print needs a distant light source for a flat shadow. Alternatively, you may present it as a Borg Cube to Trekkie friends. For the best outcome, print in black and attempt scanning QR codes directly from faces rather than shadows.
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