splatter-tennis/main.js

// Splatter Tennis — boot, main loop, intro overlay, and the window.T test hooks.
// World units: meters. z axis = court depth, 0 at FAR baseline, 23.77 at NEAR baseline.
// Module map: config (tuning/constants) · state (mutable game state) · gameplay (logic/update)
//             render (camera/drawing) · input (keys/touch) · audio (sfx/umpire) · panel (T tuning UI)

import { TUNE, COURT, COURTS, UMP_H, UMP_X, EATEN_RESTART } from './config.js';
import { P, O, ball, score, G, setupPoint, selectCourt } from './state.js';
import { update, restartRun, keyPressed, solveShot, inServeBox, inCourt, forceZombies, splatPoint, deliverTin, selectWeapon, grantWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight } from './gameplay.js';
import { fitViewport, render, proj, RES } from './render.js';
import { voice, ambient, menuMusic, menuDuck } from './audio.js';
import { zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer , spawnBarrel } from './zombies.js';
import { cv } from './dom.js';
import './input.js';

let last = performance.now();
function frame(now) {
  requestAnimationFrame(frame); // schedule FIRST: one bad frame must never kill the loop (a thrown error froze the game for good)
  if (TUNE.fps && now - last < 1000 / TUNE.fps - 2) return; // frame cap (battery): skip RAF ticks until it's our beat
  let dt = Math.min(0.04, (now - last) / 1000); last = now;
  // A chapter boss dies in slow motion. The clock that ENDS it runs at real speed, so the effect is
  // always the same length in seconds however far the world has been slowed.
  if (G.slowT > 0) { G.slowT -= dt; dt *= TUNE.bossSlowMo; }
  update(dt); render();
}

fitViewport();
// iOS PWA cold start. Launched from the homescreen, WebKit resolves the viewport AND every env()
// safe-area inset once, against a provisional geometry, and never revisits them until the geometry
// is "exercised" — which is why the game only filled the screen after a rotate and back, and why
// waiting for an event could never work: nothing fires. Toggling viewport-fit off and on is the
// known WebKit workaround: it forces that recalculation without the user rotating anything.
// Standalone only, because that is the only mode with the bug.
if (navigator.standalone || matchMedia('(display-mode: standalone)').matches) {
  const meta = document.querySelector('meta[name=viewport]'), real = meta.content;
  meta.content = real.replace('viewport-fit=cover', 'viewport-fit=auto');
  requestAnimationFrame(() => { meta.content = real; requestAnimationFrame(fitViewport); });
}
setupPoint();
// warm the pixel HUD font so the canvas never paints a system-serif fallback frame
if (document.fonts) { document.fonts.load('700 8px Silkscreen'); document.fonts.load('400 8px Silkscreen'); }

// The overlay is a three-stage machine: splash -> {courts, tutorial}. The title screen IS the menu —
// a separate menu stage behind it showed the same logo on the same backdrop and read as the title
// screen failing to advance. One overlay throughout, swapped by data-stage, so the court never
// flashes between screens; HIDDEN during play rather than removed, so a restart puts it back.
const intro = document.getElementById('intro');
const menuUp = () => !intro.hidden;
const lastCourt = (() => { try { return localStorage.getItem('court'); } catch { return null; } })();
let picked = lastCourt || COURTS[0].id;
const go = stage => { intro.dataset.stage = stage; menuMusic(); }; // every stage change is a gesture, so it is also a safe place to (re)start the theme

// --- court rows, built from the table
const courtList = document.getElementById('courtList');
for (const c of COURTS) {
  const b = document.createElement('button');
  b.className = 'court' + (c.id === picked ? ' on' : ''); // your last court comes up pre-picked
  b.innerHTML = `<img src="assets/${c.tile}.png?v=81" alt=""><span><b>${c.name}</b><i>${c.sub}</i></span>`;
  // Tapping a tile SELECTS it and nothing more. It used to start the match on the spot, which gave
  // you no way to look at the three of them and no way back out of the screen.
  b.addEventListener('click', () => {
    picked = c.id;
    for (const el of courtList.children) el.classList.toggle('on', el === b);
  });
  courtList.appendChild(b);
}

function start() {
  if (!menuUp()) return;
  selectCourt(picked);
  menuDuck(true); // the theme belongs to the menus — hand the court over to the ambience
  intro.hidden = true; ambient(); voice('quiet_please'); // low atmosphere bed starts with the first gesture
}
document.getElementById('mStart').addEventListener('click', () => go('courts'));
document.getElementById('mTut').addEventListener('click', () => { tutPage = 0; drawTut(); go('tutorial'); });
document.getElementById('cStart').addEventListener('click', start);
document.getElementById('cBack').addEventListener('click', () => go('splash'));

// --- the tutorial, narrated by Marvin the mop boy. Pure data: a page is a Marvin pose, an optional
// picture already in assets/, and his lines.
const TUT = [
  { pose: 1, say: ["I'm <em>MARVIN</em>. I mop the court.",
                   "Lately there is a great deal more to mop.",
                   "Let me show you how this goes."] },
  { pose: 2, shot: 'tut_serve', say: ["First it is just <em>TENNIS</em>.",
                   "<em>TAP</em> once to toss, tap again to serve.",
                   "<em>FLICK</em> toward where you want it.",
                   "<em>DRAG</em> to run — though he mostly runs himself."] },
  { pose: 4, say: ["Then, at some point, the other fellow...",
                   "stops being the other fellow.",
                   "Nobody stops the match. Nobody ever does."] },
  { pose: 2, shot: 'tut_aim', say: ["Now you do not rally. You <em>AIM</em>.",
                   "<em>PULL BACK</em> from your man and let go.",
                   "The further you pull, the harder it lands.",
                   "A soft one only makes them cross."] },
  { pose: 2, shot: 'tut_rack', say: ["I bring tins out to the rack down there.",
                   "<em>BOMBS</em>, <em>TRIPLES</em>, <em>FIRE</em>, and the <em>GUN</em>.",
                   "Tap the rack to load one, then serve it.",
                   "Do try not to hit me with them."] },
  { pose: 3, shot: 'tut_duel', say: ["Sometimes the umpire calls order back.",
                   "One point, tennis rules, against one of them.",
                   "The lines are live again. Do not miss."] },
  { pose: 1, say: ["That is the lot. Mind the deep ones.",
                   "And if it all goes wrong —",
                   "I will be along with the mop."] },
];
let tutPage = 0;
const tSay = document.getElementById('tSay'), tMarvin = document.getElementById('tMarvin');
const tShot = document.getElementById('tShot');
const tDots = document.getElementById('tDots'), tNext = document.getElementById('tNext');
function drawTut() {
  const p = TUT[tutPage];
  tMarvin.src = `assets/marvin${p.pose}.png?v=92`;
  tShot.style.display = p.shot ? 'block' : 'none';
  if (p.shot) tShot.src = `assets/${p.shot}.png?v=93`;
  tSay.innerHTML = p.say.map(l => `<p>${l}</p>`).join('');
  tDots.textContent = TUT.map((_, i) => i === tutPage ? '●' : '·').join('');
  tNext.textContent = tutPage === TUT.length - 1 ? 'DONE' : 'NEXT';
}
tNext.addEventListener('click', () => {
  if (tutPage < TUT.length - 1) { tutPage++; drawTut(); } else go('splash');
});
document.getElementById('tBack').addEventListener('click', () => {
  if (tutPage > 0) { tutPage--; drawTut(); } else go('splash');
});

// THE FIRST TAP ANYWHERE ON THE OVERLAY STARTS THE THEME, and does nothing else — the screens have
// real buttons now. This is the gesture the autoplay policy is waiting for, which is why the theme
// is not started at boot. menuMusic itself is a no-op once the bed exists (loopBed's beds.has
// guard), so coming back from a run picks up the track already playing rather than restarting it.
intro.addEventListener('pointerdown', () => menuMusic());
// which build am I looking at? Push = deploy and the browser cannot see git, so the served file's
// own timestamp IS the version marker — it changes on every deploy, with nothing to remember to bump.
// Match it against `git log -1 --format=%cd` when a phone looks suspiciously out of date.
fetch('main.js', { method: 'HEAD' })
  .then(r => { const t = r.headers.get('last-modified'); if (!t) return;
    document.getElementById('build').textContent = 'BUILD ' + new Date(t).toLocaleString('en-GB').replace(',', ''); })
  .catch(() => {}); // no header, no line — never a broken start screen
// Keyboard, per stage. On the splash Enter/Space starts, T opens the tutorial; on the court screen
// 1..N picks and Enter starts; Escape backs out to the splash.
addEventListener('keydown', e => {
  if (!menuUp()) return;
  menuMusic(); // a key is a gesture too — unlock the theme on a desktop that never taps
  const stage = intro.dataset.stage;
  if (e.key === 'Escape') return go('splash');
  if (stage === 'splash') {
    if (e.key === 'Enter' || e.key === ' ') go('courts');
    else if (e.key === 't' || e.key === 'T') { tutPage = 0; drawTut(); go('tutorial'); }
    return;
  }
  if (stage === 'tutorial') { if (e.key === 'Enter' || e.key === ' ') tNext.click(); return; }
  const n = parseInt(e.key, 10);
  if (n >= 1 && n <= COURTS.length) courtList.children[n - 1].click();
  else if (e.key === 'Enter' || e.key === ' ') start();
});

// eaten: any tap or key returns to the title — but only once the death animation has played out, so
// a panic tap during the gore burst can't skip it. A modal owns its own gesture (see input.js).
// NOT a page reload any more: that reset everything honestly but also tore down the AudioContext, so
// the theme restarted from silence. restartRun puts every bag back from a pristine copy, and the
// bed that has been playing under the death summary simply carries on into the title screen.
const maybeRestart = () => {
  if (G.modal || G.mode !== 'eaten' || G.eatenT <= EATEN_RESTART) return;
  restartRun();
  intro.hidden = false; go('splash');
};
cv.addEventListener('pointerdown', maybeRestart);
addEventListener('keydown', maybeRestart);

// hidden shortcut: tap the umpire three times to summon zombie mode early
let umpTaps = [];
cv.addEventListener('pointerdown', e => {
  const r = cv.getBoundingClientRect();
  const x = (e.clientX - r.left) / r.width * (cv.width / RES);  // logical coords
  const y = (e.clientY - r.top) / r.height * (cv.height / RES);
  if (x >= 6 && x <= 138 && y >= 6 && y <= 36) { G.logShow = !G.logShow; return; } // scoreboard tap = miss-log overlay
  const u = proj(UMP_X, 0, COURT.netZ);
  if (Math.abs(x - u.x) > 16 || y > u.y + 6 || y < u.y - UMP_H * u.s - 8) return;
  const now = performance.now();
  umpTaps = umpTaps.filter(t => now - t < 1600);
  umpTaps.push(now);
  if (umpTaps.length >= 3) { umpTaps = []; forceZombies(); }
});

requestAnimationFrame(frame);

// exposed for in-browser sanity checks and simulated playtests
window.T = { TUNE, ball, P, O, score, G, zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, spawnBarrel, grantWeapon, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer, splatPoint, solveShot, inServeBox, inCourt, proj, setupPoint, forceZombies, deliverTin, selectWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight,
  step: dt => update(dt), render, press: keyPressed,
  get phase() { return G.phase; }, set phase(v) { G.phase = v; } };