six months in a can

Like many projects, this one was abandonned for a while. But it’s (mostly) done now. solarigraphy Solarigraphy is the photographic practice of using a pinhole camera to capture an image of the sun’s path over days-weeks-months-years. Typically it uses regular B&W photo paper[1] for capturing the image. And processing is gloriously simple: scan the image, invert it left-to-right, and invert the colours. No red-light or chemistry required. I’ve had a handful of successful attempts, and just as many unsuccessful ones[2]. The unsuccessful, along with my impatience at waiting six months, motivated me to write some wobbly code to simulate these. To model a solarigraph we need (a) coordinates and (b) dates. From those we can generate the sun’s path; get hold of some whether data; determine what the horizon looks like. Then cobble them together into a single plot. Onwards. the sun’s path Every day the sun draws a smooth curve across the sky that a well-placed solarigraph is primed to capture.…