#descriptivegeometry — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #descriptivegeometry, aggregated by home.social.
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Dare to Be Negative!
Do you remember analog photo negatives? I still have some, tucked away deep in the archives. I always found them eerie and uncanny. Humans turned into zombies with black teeth. Burnt orange, weird cyan and violet everywhere. But what did I expect? We don't have an intuition for addition or subtraction of colors. Would you "expect" red and green adding up to yellow? The exact opposites of our usual, friendly red-yellow-green-blue are uncommon in the real world. I once tried to create […] -
Circles to Lines (2026)
Circles and lines - that sounded manageable. So, this was one of my first attempts at reviving descriptive geometry. A circle on a sphere is projected into a circle in the equatorial plane under stereographic projection. But if the source circle contains the North Pole, the projection ray in this point becomes tangent to the sphere and parallel to the equatorial plane. Thus circles containing the North Pole are projected into lines - circles with infinite radii. The drawing shows this […] -
Drawing With Code
What does it even mean? I see two main ways of drawing with code: 1) going for a representation of a thing you have in mind, or 2) using an algorithm and elements of randomness to surprise you. Representational I have code-drawn Lissajous curves with code - from a picture in mind before I started. I saw the curves as built from wires as thin as possible, or as thick metallic tubes. I have been lucky that I mathematical objects can be compressed so well into code. It would be way more […]