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My tutorial on Generative Typography with Processing is online now. It's a walkthrough of the more than 20 open-source code examples I am sharing. It covers aggregate drawing, PDF-export and 3D examples in the context of taking the base forms of typography and then using code to make beautiful things with them. There are many algorithms used: circle-packing, flowfield, voronoi, etc. See some of the results in the video above. You can check out the full tutorial here:
Have fun and happy creative coding! :-)