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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Timeline face — prototype 2</title>
<style>
:root{
--ground:#050505; --cream:#f3e7c5; --silver:#bfc4d0; --steel:#969385;
--dim:#7c838a; --gold:#dab53d; --gold-hi:#ffd75f; --slate:#54677d;
--night:#39435a; --line:#2c2823; --now:#c8452f;
--mono:"BerkeleyMono Nerd Font","Berkeley Mono",ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:#111;color:var(--silver);font-family:var(--mono)}
.chrome{padding:14px 18px 0;font-size:13px;letter-spacing:.16em;
text-transform:uppercase;color:var(--steel)}
.chrome b{color:var(--cream);font-weight:700}
.bar{padding:10px 18px 12px;display:flex;gap:10px;align-items:center;font-size:13px}
button{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
background:#191919;color:var(--silver);border:1px solid #2e2e2e;padding:6px 11px;cursor:pointer}
button.on{background:var(--gold);color:#111;border-color:var(--gold)}
.note{color:var(--dim);font-size:12px;padding:0 18px 12px;max-width:1180px;line-height:1.55}
.stage{margin:0 18px 18px;border:1px solid #262626;background:var(--ground);
width:calc(100% - 36px);aspect-ratio:3440/1440;position:relative}
svg{position:absolute;inset:0;width:100%;height:100%}
</style>
</head>
<body>
<div class="chrome">Timeline face · prototype 2 · <b>synthetic events</b></div>
<div class="bar">
<span style="color:var(--steel)">diagonal</span>
<button data-dir="W" class="on">west at left — crossing 21.4%</button>
<button data-dir="E">east at left — crossing 78.6%</button>
<span style="width:20px"></span>
<button id="tscrub">scrub the day</button>
</div>
<div class="note">
The crossing is not a free parameter. The horizontal meets the diagonal at the
home city, and New Orleans is 4th of 15 west-to-east, so it lands at 21.4%.
Reversing the diagonal puts the same intersection at 78.6%. Both numbers
describe one point. Events are invented; the city roster is real.
Vertical offset on an event is collision avoidance and carries no data —
duration is a quantity of time, so it reads as bar length on the time axis.
</div>
<div class="stage"><svg id="face" viewBox="0 0 3440 1440"></svg></div>
<script>
const CITIES = [
{tz:"Pacific/Honolulu",label:"Honolulu"}, {tz:"America/Anchorage",label:"Anchorage"},
{tz:"America/Los_Angeles",label:"Berkeley"},{tz:"America/Chicago",label:"New Orleans",home:true},
{tz:"America/New_York",label:"New York"}, {tz:"Europe/London",label:"London"},
{tz:"Europe/Paris",label:"Paris"}, {tz:"Europe/Athens",label:"Athens"},
{tz:"Europe/Istanbul",label:"Istanbul"}, {tz:"Asia/Yerevan",label:"Yerevan"},
{tz:"Asia/Kolkata",label:"Delhi"}, {tz:"Asia/Shanghai",label:"Shanghai"},
{tz:"Asia/Tokyo",label:"Tokyo"}, {tz:"Australia/Sydney",label:"Sydney"},
{tz:"Pacific/Auckland",label:"Wellington"},
];
const FIXTURE = [
{dh:-3.4,dur:25,title:"Morning prep"}, {dh:-1.9,dur:15,title:"Daily standup"},
{dh:-0.6,dur:30,title:"Review inbox"}, {dh:0.8,dur:25,title:"Weekly 1:1"},
{dh:2.3,dur:60,title:"Design review"}, {dh:4.1,dur:30,title:"Vendor call"},
{dh:6.5,dur:45,title:"Planning"}, {dh:9.2,dur:20,title:"Wind down"},
{dh:12.0,dur:30,title:"Goodnight"},
];
const W=3440, H=1440, SPAN_H=24, MAX_FONT=72, NS="http://www.w3.org/2000/svg";
const svg=document.getElementById("face");
let orient="W", scrub=null;
const greyFor = sz => Math.floor(Math.min(MAX_FONT,sz)*127/MAX_FONT)+128;
const rgb = l => `rgb(${l},${l},${l})`;
function el(n,a,t){const e=document.createElementNS(NS,n);for(const k in a)e.setAttribute(k,a[k]);
if(t!=null)e.textContent=t;return e;}
function tzParts(d,tz){const f=new Intl.DateTimeFormat("en-GB",{timeZone:tz,hour12:false,
hour:"2-digit",minute:"2-digit"});const p={};for(const{type,value}of f.formatToParts(d))p[type]=value;return p;}
const isDay = h => h>=6 && h<19;
const now = () => scrub!=null ? new Date(scrub) : new Date();
// The diagonal spans the full plot. Home's rank fixes the crossing.
function geom(){
const M={l:210,r:210,t:150,b:190};
const n=CITIES.length, hi=CITIES.findIndex(c=>c.home);
const frac = orient==="W" ? hi/(n-1) : 1-hi/(n-1);
return {x0:M.l, x1:W-M.r, y0:M.t, y1:H-M.b, n, hi, frac,
crossX: M.l+(W-M.l-M.r)*frac,
homeY: (H-M.b)-(hi/(n-1))*((H-M.b)-M.t)};
}
const cityPos = (g,i) => {
const f=i/(g.n-1);
return [g.x0+(orient==="W"?f:1-f)*(g.x1-g.x0), g.y1-f*(g.y1-g.y0)];
};
const pxPerHour = g => (g.x1-g.x0)/SPAN_H;
const timeToX = (g,t,ref) => g.crossX + (t-ref)/3600000*pxPerHour(g);
function drawDiagonal(g,ref){
const [ax,ay]=cityPos(g,0), [bx,by]=cityPos(g,g.n-1);
svg.appendChild(el("line",{x1:ax,y1:ay,x2:bx,y2:by,stroke:"var(--line)",
"stroke-width":1,"stroke-opacity":0.85}));
CITIES.forEach((c,i)=>{
const [x,y]=cityPos(g,i);
const p=tzParts(ref,c.tz), hr=parseInt(p.hour,10), day=isDay(hr);
const size = c.home?27:20;
const col = c.home?"var(--gold)":(day?"var(--cream)":"var(--slate)");
svg.appendChild(el("circle",{cx:x,cy:y,r:c.home?6:2.5,
fill:c.home?"var(--gold)":(day?"var(--cream)":"var(--night)")}));
// label sits above-left of its node so it never leaves the frame
svg.appendChild(el("text",{x:x-16,y:y-16,"text-anchor":"end","font-size":size,fill:col,
"letter-spacing":"0.18em","font-weight":c.home?700:400},
c.label.toUpperCase()+(day?"":" ☾")));
svg.appendChild(el("text",{x:x+16,y:y-16,"font-size":size*0.95,
fill:c.home?"var(--gold-hi)":(day?"var(--steel)":"var(--night)"),
"letter-spacing":"0.06em"},`${p.hour}:${p.minute}`));
});
}
function drawHourAxis(g,ref){
const pph=pxPerHour(g), y=g.homeY, size=22;
svg.appendChild(el("line",{x1:g.x0,y1:y,x2:g.x1,y2:y,stroke:"var(--line)","stroke-width":1}));
const h0=new Date(ref.getTime()-(g.crossX-g.x0)/pph*3600000); h0.setMinutes(0,0,0);
for(let k=0;k<=SPAN_H+1;k++){
const t=new Date(h0.getTime()+k*3600000), x=timeToX(g,t.getTime(),ref.getTime());
if(x<g.x0-1||x>g.x1+1) continue;
const future=t.getTime()>=ref.getTime();
const lvl=future?greyFor(size):Math.round(greyFor(size)*0.40);
svg.appendChild(el("line",{x1:x,y1:y,x2:x,y2:y+11,stroke:rgb(lvl),
"stroke-width":1,"stroke-opacity":0.6}));
svg.appendChild(el("text",{x,y:y+40,"text-anchor":"middle","font-size":size*0.8,
fill:rgb(lvl),"letter-spacing":"0.12em"},String(t.getHours()).padStart(2,"0")));
}
}
function drawEvents(g,ref){
const refMs=ref.getTime(), pph=pxPerHour(g), y=g.homeY;
const evs=FIXTURE.map(e=>({...e,start:refMs+e.dh*3600000})).sort((a,b)=>a.start-b.start);
const next=evs.find(e=>e.start>=refMs);
const lanes=[];
evs.forEach(e=>{
const x=timeToX(g,e.start,refMs);
if(x<g.x0-30||x>g.x1+30) return;
const wpx=Math.max(4,(e.dur/60)*pph), future=e.start>=refMs;
const isNext = next && e.start===next.start;
const est=e.title.length*11+70;
let lane=0; while(lanes[lane]!=null&&lanes[lane]>x-est) lane++;
lanes[lane]=x+est;
const ly = y - 46 - lane*46; // events live above the axis only
const lvl = future?236:100;
const col = isNext?"var(--gold-hi)":rgb(lvl);
svg.appendChild(el("rect",{x,y:y-5,width:wpx,height:10,fill:col,
"fill-opacity":isNext?0.95:(future?0.5:0.25)}));
svg.appendChild(el("line",{x1:x,y1:y-6,x2:x,y2:ly+10,stroke:col,
"stroke-width":isNext?1.6:0.8,"stroke-opacity":isNext?0.85:0.3}));
const d=new Date(e.start);
const hhmm=`${String(d.getHours()).padStart(2,"0")}:${String(d.getMinutes()).padStart(2,"0")}`;
svg.appendChild(el("text",{x,y:ly,"text-anchor":"middle","font-size":isNext?32:21,
fill:col,"font-weight":isNext?700:400,"letter-spacing":"0.05em"},
isNext?`${hhmm} ${e.title}`:e.title));
if(!isNext) svg.appendChild(el("text",{x,y:ly-21,"text-anchor":"middle","font-size":15,
fill:rgb(Math.round(lvl*0.6)),"letter-spacing":"0.1em"},hhmm));
});
}
function drawCrossing(g,ref){
svg.appendChild(el("line",{x1:g.crossX,y1:g.y0-60,x2:g.crossX,y2:g.y1+60,
stroke:"var(--now)","stroke-width":1.2,"stroke-opacity":0.55}));
svg.appendChild(el("circle",{cx:g.crossX,cy:g.homeY,r:8,fill:"var(--now)"}));
const p=tzParts(ref,"America/Chicago");
svg.appendChild(el("text",{x:g.crossX,y:g.y1+108,"text-anchor":"middle","font-size":30,
fill:"var(--now)","letter-spacing":"0.16em"},`NOW ${p.hour}:${p.minute}`));
svg.appendChild(el("text",{x:g.crossX,y:g.y1+140,"text-anchor":"middle","font-size":15,
fill:"var(--dim)","letter-spacing":"0.14em"},
`CROSSING ${(g.frac*100).toFixed(1)}%`));
}
function render(){
while(svg.firstChild) svg.removeChild(svg.firstChild);
const ref=now(), g=geom();
drawDiagonal(g,ref);
drawHourAxis(g,ref);
drawEvents(g,ref);
drawCrossing(g,ref);
}
document.querySelectorAll("button[data-dir]").forEach(b=>b.addEventListener("click",()=>{
orient=b.dataset.dir;
document.querySelectorAll("button[data-dir]").forEach(o=>o.classList.toggle("on",o===b));
render();
}));
document.getElementById("tscrub").addEventListener("click",e=>{
scrub = scrub==null ? Date.now() : null;
e.target.classList.toggle("on", scrub!=null);
});
setInterval(()=>{ if(scrub!=null) scrub+=4*60000; render(); },250);
render();
</script>
</body>
</html>
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