Function loadNetworkData

web/scripts/ragnar_modern.js:2870–2881

()

// Draw the passive survey into one canvas. The in-page chart and the
// full-screen console differ only in scale, so they share this — `big` bumps
// type and padding for the large surface. Every AP's plotted box is recorded on
// the canvas (`_wifiHits`) together with the plot geometry (`_wifiGeom`), which
// is what lets hover and click map a pixel back to a BSSID.
function _wifiDrawSpectrumInto(canvas, opts) {
    const d = _wifiState.data; if (!d || !canvas) return;
    const o = opts || {};
    const K = o.big ? 1.3 : 1;                    // type / padding scale
    const dpr = window.devicePixelRatio || 1;
    const W = canvas.clientWidth, H = Math.round(o.height || canvas.clientHeight || 360);
    if (W < 20 || H < 20) return;
    canvas.width = W * dpr; canvas.height = H * dpr;
    canvas._wifiHits = [];
    const ctx = canvas.getContext('2d'); ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
    ctx.clearRect(0, 0, W, H);
    const padL = Math.round(40 * K), padR = Math.round(12 * K),