Ретроград 2025 demo: Zebra by svofski

A computationally intensive demo for Vector-06c presented at Retrograd 2025. For unexpanded Vector-06c (64K RAM, VI53 sound) Code, music, graphics svofski Maths optimisations ivagor Based on shadertoy by iq/Fabrice/GregRostami/TomCat/fb39ca4 see https://www.shadertoy.com/view/4lVXWw Initially a curiosity to test z88dk maths capabilities. Unoptimised floating-point version used to take about 136 minutes to compute. A trick here or there and custom tailored maths routines by ivagor helped bring this time down to under 3 minutes. Thanks for your patience. ~ svofski 2025