#PenPlotter maintenance today. My HP 7585B stopped responding over RS-232. Diagnostics revealed a problem with the interface card. Luckily I have a spare machine that can donate a new working card!
And it works! Here’s a video of the HP 7585B #PenPlotter plotting a big arc Truchet tile design using three colors (yellow, cyan, and magenta) on 11x15 watercolor. Total time 1h15m.
Video montage of a HP 7585 #PenPlotter plotting a design of large concentric arcs broken up by squares in cyan, yellow, and magenta. It performs tool changes to swap pens automatically.
I've been using #Processing's Catmul-Rom "curve vertex" for maybe 10 years now and I still manager to get it wrong and get frustraded 🤡 #CreativeCoding
Realized that the OpenGL library I'm using looks up the size of the elements in the array for every access when writing to a vertex attribute array. Wrote my own version of this that caches the size and now my renderer is cooking (I have a large vertex attribute array that I use for instancing).
This is definitely good enough for me for now, as I'm now drawing millions of entities per second, which is Just Fine™️ for 2D rendering. 🔥