Function handleScanError

web/scripts/ragnar_modern.js:3501–3504

(data)

    t = Math.max(0, Math.min(1, t));
    return Math.hypot(px - (x1 + t * dx), py - (y1 + t * dy));
}

// Screen-space radius (px) a column is drawn at — kept in sync with _wifiHmDrawDesign.
function _wifiHmColumnPxRadius(c, vp) {
    const floorM = _wifiHmFloorM();
    const pxPerM = vp.pw / (vp.span * floorM);
    return Math.max(5, (c.radius_m || 0.3) * pxPerM);