Solving Carpenter 1/16" Tape Rounding and IES Lighting Grids in Vanilla JS
Floating-point math in JavaScript is straightforward until your output has to survive a real jobsite tape measure or a ceiling full of floor joists and garage door tracks. While building two browser-based layout calculators for residential framing and ceiling lighting, I ran into three geometry problems where naive total / count math quietly fails in the real world. Here is how the underlying…
This article explains three geometry problems that can occur when trying to use basic floating-point math in JavaScript for real-world layout calculations in residential framing and ceiling lighting. It covers floating-point rounding errors, stair rake projection inaccuracies, and the IES Zonal Cavity lighting method.
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