Files
Learn_System/frontend/js/labs/electrolysis.js
T
Maxim Dolgolyov ae31e4c4e8 refactor: distribute lab-init.js into 34 engine files
lab-init.js: 4098 -> 543 lines (infrastructure + THEORY only)

Each sim's _open*() + UI helpers moved to its engine file:
graph.js, projectile.js, collision.js, magnetic.js, triangle.js,
geometry.js, trigcircle.js, gas.js (molphys), coulomb.js, circuit.js,
reactions.js (chemistry), newton.js (dynamics), chemsandbox.js,
celldivision.js, photosynthesis.js, angrybirds.js, quadratic.js,
normaldist.js, graphtransform.js, pendulum.js, equilibrium.js,
thinlens.js, mirror.js, isoprocess.js, titration.js, refraction.js,
probability.js, bohratom.js, electrolysis.js, waves.js,
crystal.js, orbitals.js, stereo.js, hydrostatics.js

All 34 engine files syntax-checked OK.
2026-05-08 14:54:54 +03:00

584 lines
21 KiB
JavaScript
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'use strict';
/**
* ElectrolysisSim v2 — Электролиз водных растворов
* Закон Фарадея: m = M·I·t / (n·F), F = 96485 Кл/моль
* Чистый рерайт: стабильная физика, ионная анимация, пузырьки, осадок.
*/
class ElectrolysisSim {
static F = 96485;
static BG = '#0b0b1a';
static FONT = 'Manrope, system-ui, sans-serif';
static ELECTROLYTES = {
NaCl: {
name: 'NaCl', displayName: 'NaCl (водный р-р)',
cation: 'Na\u207A', anion: 'Cl\u207B',
M: 2, n: 2, R: 8,
solColor: [160, 200, 230],
cathodeProduct: 'H\u2082', anodeProduct: 'Cl\u2082',
depositColor: null,
cathodeBubColor: 'rgba(160,210,255,0.55)',
anodeBubColor: 'rgba(180,255,140,0.50)',
cathodeEq: '2H\u2082O + 2e\u207B \u2192 H\u2082 + 2OH\u207B',
anodeEq: '2Cl\u207B \u2212 2e\u207B \u2192 Cl\u2082',
},
CuSO4: {
name: 'CuSO\u2084', displayName: 'CuSO\u2084 (водный р-р)',
cation: 'Cu\u00B2\u207A', anion: 'SO\u2084\u00B2\u207B',
M: 63.546, n: 2, R: 12,
solColor: [55, 120, 210],
cathodeProduct: 'Cu\u2193', anodeProduct: 'O\u2082',
depositColor: '#b87333',
cathodeBubColor: null,
anodeBubColor: 'rgba(200,210,255,0.50)',
cathodeEq: 'Cu\u00B2\u207A + 2e\u207B \u2192 Cu\u2193',
anodeEq: '2H\u2082O \u2212 4e\u207B \u2192 O\u2082 + 4H\u207A',
},
H2SO4: {
name: 'H\u2082SO\u2084', displayName: 'H\u2082SO\u2084 (водный р-р)',
cation: 'H\u207A', anion: 'SO\u2084\u00B2\u207B',
M: 2, n: 2, R: 6,
solColor: [200, 200, 215],
cathodeProduct: 'H\u2082', anodeProduct: 'O\u2082',
depositColor: null,
cathodeBubColor: 'rgba(160,210,255,0.55)',
anodeBubColor: 'rgba(200,210,255,0.50)',
cathodeEq: '2H\u207A + 2e\u207B \u2192 H\u2082',
anodeEq: '2H\u2082O \u2212 4e\u207B \u2192 O\u2082 + 4H\u207A',
},
};
constructor(canvas) {
this.canvas = canvas;
this.ctx = canvas.getContext('2d');
this.W = 0; this.H = 0;
this.voltage = 6;
this.electrolyte = 'NaCl';
this.speed = 1;
this._time = 0;
this._massDeposit = 0;
this._gasVolume = 0;
this._depositH = 0;
this._ions = [];
this._bubbles = [];
this._electronPhase = 0;
this.playing = false;
this._raf = null;
this._lastTs = null;
this.onUpdate = null;
new ResizeObserver(() => { this.fit(); this.draw(); }).observe(canvas.parentElement);
}
// ── public API ────────────────────────────────────────────────
fit() {
const dpr = window.devicePixelRatio || 1;
const w = this.canvas.offsetWidth || 640;
const h = this.canvas.offsetHeight || 420;
this.canvas.width = w * dpr;
this.canvas.height = h * dpr;
this.ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
this.W = w; this.H = h;
this._initIons();
}
getParams() { return { voltage: this.voltage, electrolyte: this.electrolyte }; }
setParams({ voltage, electrolyte } = {}) {
if (voltage !== undefined) this.voltage = Math.max(1, Math.min(12, +voltage));
if (electrolyte !== undefined) {
// accept both 'nacl' (from lab.html) and 'NaCl' (canonical)
const keyMap = { nacl: 'NaCl', cuso4: 'CuSO4', h2so4: 'H2SO4' };
const key = keyMap[String(electrolyte).toLowerCase()] || electrolyte;
if (ElectrolysisSim.ELECTROLYTES[key] && this.electrolyte !== key) {
this.electrolyte = key;
this.reset(); return;
}
}
this.draw(); this._emit();
}
preset(name) {
const map = { nacl: ['NaCl', 6], cuso4: ['CuSO4', 4], h2so4: ['H2SO4', 3] };
const [el, v] = map[name] || map.nacl;
this.voltage = v; this.electrolyte = el;
this.reset();
}
reset() {
this.pause();
this._time = 0; this._massDeposit = 0;
this._gasVolume = 0; this._depositH = 0;
this._bubbles = []; this._electronPhase = 0;
this._initIons();
this.draw(); this._emit();
}
play() { if (this.playing) return; this.playing = true; this._lastTs = null; this._tick(); }
pause() { this.playing = false; if (this._raf) { cancelAnimationFrame(this._raf); this._raf = null; } }
start() { this.play(); }
stop() { this.pause(); }
info() {
return {
voltage: this.voltage,
current: +this._current().toFixed(3),
electrolyte: this.electrolyte,
massDeposited: +this._massDeposit.toFixed(4),
gasVolume: +this._gasVolume.toFixed(2),
time: +this._time.toFixed(1),
};
}
// ── internals ─────────────────────────────────────────────────
_emit() { if (this.onUpdate) this.onUpdate(this.info()); }
_el() { return ElectrolysisSim.ELECTROLYTES[this.electrolyte]; }
_current() { return this.voltage / this._el().R; }
_cell() {
const { W, H } = this;
const cw = Math.min(W * 0.50, 300);
const ch = Math.min(H * 0.48, 210);
return { cx: (W - cw) / 2, cy: H * 0.28, cw, ch };
}
_electrodes() {
const { cx, cy, cw, ch } = this._cell();
const ew = 13, eh = ch * 0.70, gap = cw * 0.12;
const ey = cy + ch - eh - 8;
return {
cathode: { x: cx + gap, y: ey, w: ew, h: eh },
anode: { x: cx + cw - gap - ew, y: ey, w: ew, h: eh },
};
}
_initIons() {
this._ions = [];
const { cx, cy, cw, ch } = this._cell();
if (!cw || !ch) return;
const el = this._el();
for (let i = 0; i < 30; i++) {
const isCat = i < 15;
this._ions.push({
x: cx + 18 + Math.random() * (cw - 36),
y: cy + 12 + Math.random() * (ch - 24),
vx: (Math.random() - 0.5) * 0.7,
vy: (Math.random() - 0.5) * 0.5,
charge: isCat ? 1 : -1,
label: isCat ? el.cation : el.anion,
color: isCat ? '#EF476F' : '#06D6E0',
});
}
}
_spawnIon(charge) {
const { cx, cy, cw, ch } = this._cell();
const el = this._el();
this._ions.push({
x: charge > 0 ? cx + 8 : cx + cw - 8,
y: cy + 12 + Math.random() * (ch - 24),
vx: charge > 0 ? 0.55 : -0.55,
vy: (Math.random() - 0.5) * 0.4,
charge,
label: charge > 0 ? el.cation : el.anion,
color: charge > 0 ? '#EF476F' : '#06D6E0',
});
}
_spawnBubble(x, y, color) {
this._bubbles.push({
x, y,
r: 1.5 + Math.random() * 2.5,
vx: (Math.random() - 0.5) * 0.3,
vy: -(0.5 + Math.random() * 0.9),
life: 1,
decay: 0.005 + Math.random() * 0.007,
color,
});
}
// ── simulation tick ────────────────────────────────────────────
_tick() {
if (!this.playing) return;
this._raf = requestAnimationFrame(ts => {
if (!this._lastTs) this._lastTs = ts;
const dt = Math.min((ts - this._lastTs) / 1000, 0.05) * this.speed;
this._lastTs = ts;
this._step(dt); this.draw(); this._emit(); this._tick();
});
}
_step(dt) {
const el = this._el(), I = this._current();
const { cx, cy, cw, ch } = this._cell();
const elec = this._electrodes();
this._time += dt;
this._electronPhase = (this._electronPhase + dt * I * 1.2) % 1;
// Faraday's law
const molesPS = I / (el.n * ElectrolysisSim.F);
if (el.depositColor) {
this._massDeposit += el.M * molesPS * dt;
this._depositH = Math.min(elec.cathode.h * 0.72, this._depositH + dt * 0.14 * I);
}
this._gasVolume += molesPS * 22400 * dt;
// Ion drift + thermal jitter
const drift = I * 0.45;
for (const ion of this._ions) {
ion.vx += (ion.charge > 0 ? -drift : drift) * dt + (Math.random() - 0.5) * 0.18;
ion.vy += (Math.random() - 0.5) * 0.14;
ion.vx = Math.max(-3.5, Math.min(3.5, ion.vx * 0.96));
ion.vy = Math.max(-3.5, Math.min(3.5, ion.vy * 0.96));
ion.x += ion.vx; ion.y += ion.vy;
ion.x = Math.max(cx + 4, Math.min(cx + cw - 4, ion.x));
ion.y = Math.max(cy + 4, Math.min(cy + ch - 4, ion.y));
}
// Ions reaching electrodes → discharge + bubbles
const rm = new Set();
for (let i = 0; i < this._ions.length; i++) {
const ion = this._ions[i];
if (ion.charge > 0 && ion.x <= elec.cathode.x + elec.cathode.w + 5) {
rm.add(i);
if (el.cathodeBubColor) {
for (let b = 0; b < 2; b++)
this._spawnBubble(
elec.cathode.x + elec.cathode.w + 2 + Math.random() * 4,
elec.cathode.y + Math.random() * elec.cathode.h,
el.cathodeBubColor);
}
}
if (ion.charge < 0 && ion.x >= elec.anode.x - 5) {
rm.add(i);
if (el.anodeBubColor) {
for (let b = 0; b < 2; b++)
this._spawnBubble(
elec.anode.x - 2 - Math.random() * 4,
elec.anode.y + Math.random() * elec.anode.h,
el.anodeBubColor);
}
}
}
this._ions = this._ions.filter((_, i) => !rm.has(i));
// Replenish ions to keep count ~15 each
let cat = 0, an = 0;
for (const ion of this._ions) ion.charge > 0 ? cat++ : an++;
while (cat < 15) { this._spawnIon(1); cat++; }
while (an < 15) { this._spawnIon(-1); an++; }
// Bubble physics
this._bubbles = this._bubbles.filter(b => {
b.x += b.vx + Math.sin(b.life * 22) * 0.12;
b.y += b.vy;
b.life -= b.decay;
return b.life > 0 && b.y > cy + 2;
});
}
// ── draw ──────────────────────────────────────────────────────
draw() {
const { ctx, W, H } = this;
if (!W || !H) return;
// Background
ctx.fillStyle = ElectrolysisSim.BG; ctx.fillRect(0, 0, W, H);
// Dot grid
ctx.fillStyle = 'rgba(255,255,255,0.018)';
for (let x = 22; x < W; x += 22)
for (let y = 22; y < H; y += 22) {
ctx.beginPath(); ctx.arc(x, y, 0.7, 0, Math.PI * 2); ctx.fill();
}
this._drawWiresAndBattery();
this._drawCellBody();
this._drawSolution();
this._drawDeposit();
this._drawElectrodes();
this._drawBubbles();
this._drawIons();
this._drawLabels();
this._drawInfoPanel();
}
_drawCellBody() {
const { ctx } = this;
const { cx, cy, cw, ch } = this._cell();
ctx.save();
ctx.strokeStyle = 'rgba(255,255,255,0.15)'; ctx.lineWidth = 2;
ctx.beginPath(); ctx.roundRect(cx, cy, cw, ch, 6); ctx.stroke();
// glass shimmer
const gg = ctx.createLinearGradient(cx, cy, cx + 14, cy);
gg.addColorStop(0, 'rgba(255,255,255,0.05)');
gg.addColorStop(1, 'rgba(255,255,255,0)');
ctx.fillStyle = gg; ctx.fillRect(cx + 1, cy + 1, 14, ch - 2);
ctx.restore();
}
_drawSolution() {
const { ctx } = this;
const { cx, cy, cw, ch } = this._cell();
const [r, g, b] = this._el().solColor;
ctx.save();
ctx.beginPath(); ctx.roundRect(cx + 2, cy + 2, cw - 4, ch - 4, 4); ctx.clip();
const sg = ctx.createLinearGradient(cx, cy, cx, cy + ch);
sg.addColorStop(0, `rgba(${r},${g},${b},0.06)`);
sg.addColorStop(1, `rgba(${r},${g},${b},0.22)`);
ctx.fillStyle = sg; ctx.fillRect(cx + 2, cy + 2, cw - 4, ch - 4);
ctx.restore();
}
_drawElectrodes() {
const { ctx } = this;
const e = this._electrodes();
const FN = ElectrolysisSim.FONT;
ctx.fillStyle = '#42425a';
ctx.beginPath(); ctx.roundRect(e.cathode.x, e.cathode.y, e.cathode.w, e.cathode.h, 3); ctx.fill();
ctx.strokeStyle = 'rgba(6,214,224,0.3)'; ctx.lineWidth = 1;
ctx.beginPath(); ctx.roundRect(e.cathode.x, e.cathode.y, e.cathode.w, e.cathode.h, 3); ctx.stroke();
ctx.fillStyle = '#525268';
ctx.beginPath(); ctx.roundRect(e.anode.x, e.anode.y, e.anode.w, e.anode.h, 3); ctx.fill();
ctx.strokeStyle = 'rgba(239,71,111,0.3)'; ctx.lineWidth = 1;
ctx.beginPath(); ctx.roundRect(e.anode.x, e.anode.y, e.anode.w, e.anode.h, 3); ctx.stroke();
ctx.font = `bold 16px ${FN}`; ctx.textAlign = 'center'; ctx.textBaseline = 'bottom';
ctx.fillStyle = '#06D6E0';
ctx.fillText('\u2212', e.cathode.x + e.cathode.w / 2, e.cathode.y - 3);
ctx.fillStyle = '#EF476F';
ctx.fillText('+', e.anode.x + e.anode.w / 2, e.anode.y - 3);
}
_drawDeposit() {
const el = this._el();
if (!el.depositColor || this._depositH < 1) return;
const { ctx } = this;
const c = this._electrodes().cathode;
const dh = Math.min(this._depositH, c.h * 0.72);
ctx.save();
const dg = ctx.createLinearGradient(c.x + c.w, c.y + c.h - dh, c.x + c.w + 10, c.y + c.h);
dg.addColorStop(0, 'rgba(184,115,51,0.35)');
dg.addColorStop(1, 'rgba(184,115,51,0.85)');
ctx.fillStyle = dg;
ctx.beginPath(); ctx.roundRect(c.x + c.w, c.y + c.h - dh, 10, dh, [2, 2, 0, 0]); ctx.fill();
ctx.shadowColor = '#b87333'; ctx.shadowBlur = 6;
ctx.fillStyle = 'rgba(210,150,80,0.5)';
ctx.beginPath(); ctx.roundRect(c.x + c.w, c.y + c.h - dh, 10, 3, [2, 2, 0, 0]); ctx.fill();
ctx.restore();
}
_drawIons() {
const { ctx } = this;
const FN = ElectrolysisSim.FONT;
ctx.save();
for (const ion of this._ions) {
const g = ctx.createRadialGradient(ion.x, ion.y, 0, ion.x, ion.y, 11);
g.addColorStop(0, ion.color + '2a'); g.addColorStop(1, ion.color + '00');
ctx.fillStyle = g;
ctx.beginPath(); ctx.arc(ion.x, ion.y, 11, 0, Math.PI * 2); ctx.fill();
ctx.fillStyle = ion.color;
ctx.beginPath(); ctx.arc(ion.x, ion.y, 4, 0, Math.PI * 2); ctx.fill();
ctx.fillStyle = 'rgba(255,255,255,0.68)';
ctx.font = `8px ${FN}`; ctx.textAlign = 'center'; ctx.textBaseline = 'bottom';
ctx.fillText(ion.label, ion.x, ion.y - 5);
}
ctx.restore();
}
_drawBubbles() {
const { ctx } = this;
ctx.save();
for (const b of this._bubbles) {
ctx.globalAlpha = b.life * 0.65;
ctx.strokeStyle = b.color; ctx.lineWidth = 0.8;
ctx.beginPath(); ctx.arc(b.x, b.y, b.r, 0, Math.PI * 2); ctx.stroke();
ctx.fillStyle = `rgba(255,255,255,${b.life * 0.18})`;
ctx.beginPath(); ctx.arc(b.x - b.r * 0.3, b.y - b.r * 0.3, b.r * 0.3, 0, Math.PI * 2); ctx.fill();
}
ctx.restore();
}
_drawWiresAndBattery() {
const { ctx } = this;
const { cx, cy, cw } = this._cell();
const e = this._electrodes();
const FN = ElectrolysisSim.FONT;
const cXt = e.cathode.x + e.cathode.w / 2; // cathode top center
const aXt = e.anode.x + e.anode.w / 2; // anode top center
const bx = cx + cw / 2; // battery center x
const by = cy - Math.max(42, this.H * 0.09); // battery y
ctx.save();
ctx.strokeStyle = 'rgba(255,255,255,0.2)'; ctx.lineWidth = 1.5;
// Cathode wire: up then right to battery
ctx.beginPath();
ctx.moveTo(cXt, e.cathode.y); ctx.lineTo(cXt, by); ctx.lineTo(bx - 22, by);
ctx.stroke();
// Anode wire: up then left to battery +
ctx.beginPath();
ctx.moveTo(aXt, e.anode.y); ctx.lineTo(aXt, by); ctx.lineTo(bx + 22, by);
ctx.stroke();
// Electron flow dots (cathode side: from battery toward cathode)
const dist = (bx - 22) - cXt;
for (let i = 0; i < 4; i++) {
const t = ((this._electronPhase + i / 4) % 1);
const ex = (bx - 22) - t * dist;
const ey = by;
if (ex >= cXt - 1 && ex <= bx - 22 + 1) {
ctx.fillStyle = '#4CC9F0'; ctx.shadowColor = '#4CC9F0'; ctx.shadowBlur = 5;
ctx.beginPath(); ctx.arc(ex, ey, 2.5, 0, Math.PI * 2); ctx.fill();
ctx.shadowBlur = 0;
}
}
// Battery symbol — two plates
ctx.strokeStyle = '#EF476F'; ctx.lineWidth = 3;
ctx.beginPath(); ctx.moveTo(bx + 22, by - 14); ctx.lineTo(bx + 22, by + 14); ctx.stroke();
ctx.strokeStyle = '#06D6E0'; ctx.lineWidth = 1.8;
ctx.beginPath(); ctx.moveTo(bx - 22, by - 8); ctx.lineTo(bx - 22, by + 8); ctx.stroke();
// Connecting wire between battery plates
ctx.strokeStyle = 'rgba(255,255,255,0.12)'; ctx.lineWidth = 1;
ctx.beginPath(); ctx.moveTo(bx - 22, by); ctx.lineTo(bx + 22, by); ctx.stroke();
// Voltage label
ctx.fillStyle = '#FFD166';
ctx.font = `bold 12px ${FN}`; ctx.textAlign = 'center'; ctx.textBaseline = 'bottom';
ctx.fillText(this.voltage.toFixed(1) + ' V', bx, by - 18);
// +/ labels on battery
ctx.fillStyle = '#EF476F'; ctx.font = `bold 10px ${FN}`; ctx.textAlign = 'left'; ctx.textBaseline = 'middle';
ctx.fillText('+', bx + 26, by);
ctx.fillStyle = '#06D6E0'; ctx.textAlign = 'right';
ctx.fillText('\u2212', bx - 26, by);
ctx.restore();
}
_drawLabels() {
const { ctx } = this;
const el = this._el(), e = this._electrodes();
const { cx, cy, cw, ch } = this._cell();
const FN = ElectrolysisSim.FONT;
ctx.save();
ctx.font = `10px ${FN}`; ctx.textAlign = 'center'; ctx.textBaseline = 'top';
ctx.fillStyle = '#06D6E0';
ctx.fillText('\u041A\u0430\u0442\u043E\u0434 (\u2212)', e.cathode.x + e.cathode.w / 2, cy + ch + 6);
ctx.fillStyle = '#EF476F';
ctx.fillText('\u0410\u043D\u043E\u0434 (+)', e.anode.x + e.anode.w / 2, cy + ch + 6);
ctx.fillStyle = 'rgba(255,255,255,0.42)';
ctx.fillText(el.cathodeProduct, e.cathode.x + e.cathode.w / 2, cy + ch + 20);
ctx.fillText(el.anodeProduct, e.anode.x + e.anode.w / 2, cy + ch + 20);
ctx.fillStyle = '#9B5DE5'; ctx.font = `bold 11px ${FN}`;
ctx.fillText(el.displayName, cx + cw / 2, cy + ch + 36);
ctx.font = `8px ${FN}`;
ctx.fillStyle = 'rgba(6,214,224,0.48)';
ctx.fillText(el.cathodeEq, e.cathode.x + e.cathode.w / 2, cy + ch + 52);
ctx.fillStyle = 'rgba(239,71,111,0.48)';
ctx.fillText(el.anodeEq, e.anode.x + e.anode.w / 2, cy + ch + 52);
ctx.restore();
}
_drawInfoPanel() {
const { ctx } = this;
const inf = this.info(), el = this._el();
const FN = ElectrolysisSim.FONT;
const px = 12, py = 10, pw = 170, lh = 17;
const rows = [
['U', inf.voltage.toFixed(1) + ' \u0412'],
['I', this._current().toFixed(3) + ' \u0410'],
['\u0422\u0432\u0440\u0435\u043C\u044F', this._fmtTime(inf.time)],
];
if (el.depositColor) rows.push(['m(Cu)', inf.massDeposited.toFixed(4) + ' \u0433']);
rows.push(['V(\u0433\u0430\u0437)', inf.gasVolume.toFixed(2) + ' \u043C\u043B']);
const ph = 12 + rows.length * lh + 8;
ctx.save();
ctx.fillStyle = 'rgba(5,5,20,0.86)';
ctx.beginPath(); ctx.roundRect(px, py, pw, ph, 7); ctx.fill();
ctx.strokeStyle = 'rgba(255,255,255,0.07)'; ctx.lineWidth = 1;
ctx.beginPath(); ctx.roundRect(px, py, pw, ph, 7); ctx.stroke();
ctx.font = `10px ${FN}`; ctx.textBaseline = 'middle';
rows.forEach(([k, v], i) => {
const ry = py + 10 + i * lh + lh / 2;
ctx.fillStyle = 'rgba(255,255,255,0.38)'; ctx.textAlign = 'left'; ctx.fillText(k, px + 10, ry);
ctx.fillStyle = 'rgba(255,255,255,0.88)'; ctx.textAlign = 'right'; ctx.fillText(v, px + pw - 10, ry);
});
ctx.fillStyle = 'rgba(255,255,255,0.16)';
ctx.font = `italic 8px ${FN}`; ctx.textAlign = 'left';
ctx.fillText('m = M\u00B7I\u00B7t / (n\u00B7F)', px + 10, py + ph + 10);
ctx.restore();
}
_fmtTime(s) {
if (s < 60) return s.toFixed(1) + ' \u0441';
return Math.floor(s / 60) + ' \u043C\u0438\u043D ' + (s % 60).toFixed(0) + ' \u0441';
}
}
if (typeof module !== 'undefined') module.exports = ElectrolysisSim;
/* ─── lab UI init ─────────────────────────────────── */
function _openElectrolysis() {
document.getElementById('sim-topbar-title').textContent = 'Электролиз';
_simShow('sim-electrolysis');
_registerSimState('electrolysis', () => elecSim?.getParams(), st => elecSim?.setParams(st));
if (_embedMode) _startStateEmit('electrolysis');
requestAnimationFrame(() => requestAnimationFrame(() => {
if (!elecSim) {
elecSim = new ElectrolysisSim(document.getElementById('electrolysis-canvas'));
elecSim.onUpdate = _elecUpdateUI;
}
elecSim.fit();
elecSim.reset();
elecSim.play();
}));
}
function elecParam(name, val) {
const v = parseFloat(val);
if (name === 'voltage') document.getElementById('elec-V-val').textContent = v;
if (elecSim) elecSim.setParams({ [name]: v });
}
function elecPreset(name, btn) {
document.querySelectorAll('.elec-type-btn').forEach(b => b.classList.remove('active'));
if (btn) btn.classList.add('active');
const voltages = { nacl: 6, cuso4: 4, h2so4: 3 };
const vt = voltages[name] || 6;
document.getElementById('sl-elec-V').value = vt; document.getElementById('elec-V-val').textContent = vt;
if (elecSim) { elecSim.setParams({ electrolyte: name, voltage: vt }); elecSim.reset(); elecSim.play(); }
}
function _elecUpdateUI(info) {
const v = (id, val) => { const el = document.getElementById(id); if (el) el.textContent = val; };
v('elecbar-v1', typeof info.current === 'number' ? info.current.toFixed(2) : '—');
v('elecbar-v2', typeof info.massDeposited === 'number' ? info.massDeposited.toFixed(3) + ' г' : '—');
v('elecbar-v3', typeof info.gasVolume === 'number' ? info.gasVolume.toFixed(1) : '—');
v('elecbar-v4', typeof info.time === 'number' ? info.time.toFixed(0) + ' с' : '—');
}
/* ── waves ── */