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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Dupre World — vertical, true longitude</title>
<style>
:root{
--ground:#050505; --cream:#f3e7c5; --silver:#bfc4d0; --steel:#969385;
--dim:#7c838a; --gold:#dab53d; --gold-hi:#ffd75f; --slate:#54677d;
--night:#39435a; --line:#2c2823;
--mono:"BerkeleyMono Nerd Font","Berkeley Mono",ui-monospace,monospace;
}
* { box-sizing: border-box; }
html, body { margin:0; height:100%; }
body {
background:var(--ground); font-family:var(--mono); color:var(--silver);
cursor:none; overflow:hidden; position:relative;
}
.masthead {
position:absolute; top:34px; left:64px;
color:var(--steel); font-size:12px; letter-spacing:0.35em;
text-transform:uppercase; z-index:3;
}
.masthead b { color:var(--gold); font-weight:400; }
svg { position:absolute; inset:0; width:100%; height:100%; z-index:1; }
.lbl {
position:absolute; z-index:2; transform:translateY(-50%);
white-space:nowrap;
}
.lbl .city { color:var(--steel); font-size:12px; letter-spacing:0.2em;
text-transform:uppercase; }
.lbl .time { color:var(--cream); font-size:26px; letter-spacing:0.04em;
line-height:1.05; }
.lbl .meta { color:var(--dim); font-size:11px; letter-spacing:0.11em; }
.lbl .meta .tz { color:var(--steel); }
.lbl.night .time { color:var(--slate); }
.lbl.night .city::after { content:" ☾"; color:var(--night); }
.lbl.home .time { color:var(--gold-hi); }
.lbl.home .city { color:var(--gold); }
</style>
</head>
<body>
<div class="masthead"><b>DUPRE</b> · WORLD WATCH · EAST → WEST</div>
<svg id="wires"></svg>
<div id="labels"></div>
<script>
const ROSTER = [
{ tz:"Pacific/Auckland", label:"Wellington", lon:174.78 },
{ tz:"Australia/Sydney", label:"Sydney", lon:151.21 },
{ tz:"Asia/Tokyo", label:"Tokyo", lon:139.69 },
{ tz:"Asia/Shanghai", label:"Shanghai", lon:121.47 },
{ tz:"Asia/Kolkata", label:"Delhi", lon:77.21 },
{ tz:"Asia/Yerevan", label:"Yerevan", lon:44.51 },
{ tz:"Europe/Istanbul", label:"Istanbul", lon:28.98 },
{ tz:"Europe/Athens", label:"Athens", lon:23.73 },
{ tz:"Europe/Paris", label:"Paris", lon:2.35 },
{ tz:"Europe/London", label:"London", lon:-0.13 },
{ tz:"America/New_York", label:"New York", lon:-74.01 },
{ tz:"America/Chicago", label:"New Orleans", lon:-90.07 },
{ tz:"America/Los_Angeles", label:"Berkeley", lon:-122.27},
{ tz:"America/Anchorage", label:"Anchorage", lon:-149.90},
{ tz:"Pacific/Honolulu", label:"Honolulu", lon:-157.86},
];
const TZNAME = {
"Pacific/Honolulu":"US Hawaii", "America/Anchorage":"US Alaska",
"America/Los_Angeles":"US Pacific", "America/Chicago":"US Central",
"America/New_York":"US Eastern", "Europe/London":"UK",
"Europe/Paris":"Central Europe", "Europe/Athens":"Eastern Europe",
"Europe/Istanbul":"Türkiye", "Asia/Yerevan":"Armenia",
"Asia/Kolkata":"India", "Asia/Shanghai":"China", "Asia/Tokyo":"Japan",
"Australia/Sydney":"Australia East", "Pacific/Auckland":"New Zealand",
};
function tzName(tz) {
if (TZNAME[tz]) return TZNAME[tz];
try {
const parts = new Intl.DateTimeFormat("en-US",
{ timeZone: tz, timeZoneName: "longGeneric" }).formatToParts(new Date());
const p = parts.find((x) => x.type === "timeZoneName");
return p ? p.value : tz.split("/").pop().replace(/_/g, " ");
} catch (e) { return tz.split("/").pop().replace(/_/g, " "); }
}
const home = Intl.DateTimeFormat().resolvedOptions().timeZone;
/* Geometry: longitude maps to y (east/high-lon at top, west/low-lon at bottom).
Dots sit at the true longitude position on a vertical line. Labels are
staggered into columns so near-longitude cities don't overwrite each other;
a horizontal leader (>= MIN_LEAD px) runs from each dot to its label. */
const LINE_X = 84, TOP = 104, BOT = 104, MIN_LEAD = 7;
const COL_W = 216, ROW_H = 68; // label footprint (3 lines + breathing room)
const lons = ROSTER.map((c) => c.lon);
const maxLon = Math.max(...lons), minLon = Math.min(...lons);
const wires = document.getElementById("wires");
const labels = document.getElementById("labels");
let nodes = [];
function layout() {
const H = window.innerHeight, W = window.innerWidth;
const drawH = H - TOP - BOT;
wires.innerHTML = ""; labels.innerHTML = ""; nodes = [];
const svgNS = "http://www.w3.org/2000/svg";
// the spine
const spine = document.createElementNS(svgNS, "line");
spine.setAttribute("x1", LINE_X); spine.setAttribute("x2", LINE_X);
spine.setAttribute("y1", TOP - 18); spine.setAttribute("y2", H - BOT + 18);
spine.setAttribute("stroke", "var(--line)"); spine.setAttribute("stroke-width", "2");
wires.appendChild(spine);
// true y per city, sorted east->west (already the roster order)
const placed = []; // per column: last y used
ROSTER.forEach((c) => {
const y = TOP + (maxLon - c.lon) / (maxLon - minLon) * drawH;
// leftmost column whose last label is >= ROW_H away
let col = 0;
while (placed[col] !== undefined && y - placed[col] < ROW_H) col++;
placed[col] = y;
const x = LINE_X + MIN_LEAD + col * COL_W;
// leader (horizontal from dot to label)
const lead = document.createElementNS(svgNS, "line");
lead.setAttribute("x1", LINE_X); lead.setAttribute("x2", x);
lead.setAttribute("y1", y); lead.setAttribute("y2", y);
lead.setAttribute("stroke", "var(--line)"); lead.setAttribute("stroke-width", "1.4");
wires.appendChild(lead);
// dot on the spine
const dot = document.createElementNS(svgNS, "circle");
dot.setAttribute("cx", LINE_X); dot.setAttribute("cy", y);
dot.setAttribute("r", "3.5");
dot.setAttribute("fill", c.tz === home ? "var(--gold)" : "var(--steel)");
wires.appendChild(dot);
const lbl = document.createElement("div");
lbl.className = "lbl";
lbl.style.left = (x + 8) + "px"; lbl.style.top = y + "px";
lbl.innerHTML = "<div class='city'>" + c.label + "</div>"
+ "<div class='time'></div>"
+ "<div class='meta'></div>";
labels.appendChild(lbl);
nodes.push({ c, lbl,
time: lbl.querySelector(".time"), meta: lbl.querySelector(".meta") });
});
}
function fmt(tz) {
const now = new Date();
const p = new Intl.DateTimeFormat("en-US", {
timeZone: tz, hour12: true, weekday: "short",
day: "numeric", hour: "numeric", minute: "2-digit",
}).formatToParts(now);
const g = (t) => (p.find((x) => x.type === t) || {}).value || "";
const h24 = new Intl.DateTimeFormat("en-US",
{ timeZone: tz, hour12: false, hour: "2-digit" }).formatToParts(now)
.find((x) => x.type === "hour").value;
return {
time: g("hour") + ":" + g("minute") + " " + g("dayPeriod"),
date: g("weekday") + " " + g("day"),
night: (parseInt(h24, 10) % 24) >= 19 || (parseInt(h24, 10) % 24) < 7,
};
}
function tick() {
for (const e of nodes) {
const f = fmt(e.c.tz);
e.time.textContent = f.time;
e.meta.innerHTML = f.date + " · <span class='tz'>"
+ tzName(e.c.tz) + "</span>";
const isHome = e.c.tz === home;
e.lbl.classList.toggle("home", isHome);
e.lbl.classList.toggle("night", f.night && !isHome);
}
}
layout(); tick();
setInterval(tick, 5000);
let rt; window.addEventListener("resize", () => {
clearTimeout(rt); rt = setTimeout(() => { layout(); tick(); }, 150);
});
</script>
</body>
</html>
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