Spiral stretch · 3d retro graphics

{"slug":"spiralstretch","number":"30","title":"Spiral stretch","era":"Illustration · 2026","section":"modern","provenance":"interpretation","reference":null,"summary":"A hopalong cousin: radius shrinks, z grows. Pointer detunes the shrink.","description":"No fluid solver. Each iterate is r ← k r, θ ← θ + ω, z ← z + c/r. Plot (r cos θ, r sin θ + z) and you get the cartoon of inward spiral plus axial stretch — the 2026 Navier–Stokes construction as a CRT orbit. Teal is early, orange is stretched. Pointer nudges k. When a walker's radius collapses it reseeds on the ring.","apis":["Canvas 2D","ImageData","Pointer Events","requestAnimationFrame","matchMedia"],"tags":["attractor","crt"],"hasGlsl":false,"interaction":"Move the pointer left or right to change how fast the radius shrinks.","url":"https://3d-retro.com/experiments/spiralstretch","example_url":"https://3d-retro.com/examples/spiralstretch.html","api_url":"https://3d-retro.com/api/v1/experiments/spiralstretch","html":"\n\n\n \n \n \n \n Spiral stretch · 3d retro graphics\n \n\n\n

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