Repeated mechanical eyelet passes simulate micro-abrasion, tensile crimp creep, and fiber fatigue.
The source creates eighteen lace points spaced sixteen canvas units apart horizontally, with a small sinusoidal vertical offset. Seventeen links therefore have a nominal horizontal span two hundred seventy two. The relaxation target is fifteen per adjacent pair, giving a nominal chain length two hundred fifty five. At point seven pixels per nominal sum the bars span one hundred ninety point four and one hundred seventy eight point five. The first point is pinned and five relaxation passes run each animation frame. These are illustrative constraint rules, not calibrated material mechanics or measured lace tension. Assigned rigidity captions do not enter this physics update, and material selection changes appearance and labels rather than force parameters. Selecting acetate assigns a rigidity caption fourteen point two, while brass assigns thirty eight point six. The bars span seventy one and one hundred ninety three at five pixels per caption value. No load or displacement experiment calculates those numbers. Raw cotton gets point four and a fifteen-percent success label. Polymer gets eleven and a ninety-five-percent success caption, but JSON export reports one hundred percent for every non-raw material. This discrepancy means exported success is not a measurement of threaded trials. The page illustrates object anatomy, but etymologies and functional claims from its bundled text are not independently checked here. The stress button starts an interval that adds five to a displayed cycle count every one hundred milliseconds. After five timer ticks it displays twenty five and stops, represented by zero and two hundred fifty pixel bars at ten pixels per caption count. It does not deform the lace, apply tension, measure strength, or count actual completed physical cycles. Threading success separately tests tip distance below twenty six from an eyelet center and tip x greater than the center; raw material then receives a jam caption and other materials success. Native pointer events and exports can inspect this implementation, while calibrated physics, measured strength, exhaustive functions, and public playback need separate evidence.