Загрузить файлы в «Prehistorik»

2026-02-23 21:16:54 +03:00
parent 3870fe54d4
commit deff698041
4 changed files with 171 additions and 0 deletions
--- a/Prehistorik/audio.js
+++ b/Prehistorik/audio.js
@@ -0,0 +1,76 @@
+'use strict';
+
+let audioCtx = null;
+
+function getAudio() {
+  if (!audioCtx) audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+  return audioCtx;
+}
+
+function beep(freq, freq2, dur, type = 'sine', vol = 0.3) {
+  try {
+    const ac = getAudio();
+    const o  = ac.createOscillator();
+    const g  = ac.createGain();
+    o.type = type;
+    o.connect(g); g.connect(ac.destination);
+    o.frequency.setValueAtTime(freq, ac.currentTime);
+    if (freq2 && freq2 !== freq) o.frequency.exponentialRampToValueAtTime(freq2, ac.currentTime + dur);
+    g.gain.setValueAtTime(vol, ac.currentTime);
+    g.gain.exponentialRampToValueAtTime(0.001, ac.currentTime + dur);
+    o.start(ac.currentTime);
+    o.stop(ac.currentTime + dur + 0.01);
+  } catch(e) {}
+}
+
+const SFX = {
+  jump:      () => beep(280, 560, 0.18, 'sine',     0.25),
+  attack:    () => beep(140, 70,  0.12, 'sawtooth', 0.30),
+  stomp:     () => { beep(200, 80, 0.1, 'square', 0.35); beep(400, 400, 0.08, 'sine', 0.2); },
+  hurt:      () => beep(180, 90,  0.28, 'square',   0.40),
+  die:       () => beep(380, 50,  0.80, 'square',   0.40),
+  collect:   () => beep(550, 880, 0.10, 'sine',     0.20),
+  heart:     () => { beep(660, 660, 0.06, 'sine', 0.2); setTimeout(() => beep(880, 880, 0.12, 'sine', 0.2), 70); },
+  killEnemy: () => beep(260, 100, 0.25, 'sawtooth', 0.28),
+  combo:     (n) => beep(440 + n * 40, 550 + n * 40, 0.08, 'sine', 0.18),
+  levelUp:   () => {
+    [523, 659, 784, 1047].forEach((f, i) =>
+      setTimeout(() => beep(f, f, i === 3 ? 0.25 : 0.08, 'sine', 0.28), i * 100)
+    );
+  },
+};
+
+// ─── Background Music ─────────────────────────────────────────────────────────
+let _musicTimer = null;
+let _musicStep  = 0;
+
+const MUSIC = {
+  menu:  { bpm: 112, notes: [392,0,523,0,659,523,392,330, 392,0,523,659,784,659,523,0] },
+  grass: { bpm: 132, notes: [523,0,659,0,784,659,523,0, 440,0,523,0,659,523,440,0] },
+  cave:  { bpm:  96, notes: [294,0,330,0,262,0,294,0, 220,0,247,0,262,0,220,0] },
+  ice:   { bpm: 108, notes: [440,0,494,523,587,0,523,494, 440,0,392,0,440,494,523,0] },
+};
+
+function startMusic(theme) {
+  stopMusic();
+  try { getAudio(); } catch(e) { return; }
+  const pat = MUSIC[theme] || MUSIC.menu;
+  const beatMs = (60000 / pat.bpm) / 2; // eighth-note duration
+  _musicStep = 0;
+
+  const tick = () => {
+    const freq = pat.notes[_musicStep % pat.notes.length];
+    if (freq > 0) {
+      beep(freq / 2, freq / 2, beatMs / 1000 * 0.75, 'square',   0.04);
+      if (_musicStep % 2 === 0) beep(freq, freq, beatMs / 1000 * 0.55, 'triangle', 0.05);
+    }
+    _musicStep++;
+    _musicTimer = setTimeout(tick, beatMs);
+  };
+  _musicTimer = setTimeout(tick, 0);
+}
+
+function stopMusic() {
+  if (_musicTimer) { clearTimeout(_musicTimer); _musicTimer = null; }
+  _musicStep = 0;
+}