Sintetizador Vetorial | Melodia Edition<\/title>\n <style>\n \/* ==========================================================================\n DESIGN SYSTEM: \"AEROSPACE & MUSIC\"\n ========================================================================== *\/\n :root {\n --bg-color: #050a10;\n --panel-bg: rgba(20, 30, 40, 0.85);\n --vec-result: #00f2ff; \/* Ciano *\/\n --vec-x: #00ff9d; \/* Verde *\/\n --vec-y: #ff0055; \/* Magenta *\/\n --target-note: #ffd700; \/* Dourado para a nota alvo *\/\n --font-stack: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;\n }\n\n body, html {\n margin: 0; padding: 0; width: 100%; height: 100%;\n background-color: var(--bg-color);\n color: #fff; font-family: var(--font-stack);\n overflow: hidden; user-select: none;\n }\n\n \/* HEADER *\/\n header {\n position: absolute; top: 0; left: 0; width: 100%;\n padding: 20px; box-sizing: border-box; pointer-events: none;\n display: flex; justify-content: space-between; z-index: 10;\n background: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent);\n }\n .brand h1 { margin: 0; font-size: 1.2rem; letter-spacing: 1px; text-transform: uppercase; color: var(--vec-result); }\n .song-info { text-align: right; }\n .song-title { color: var(--target-note); font-weight: bold; font-size: 1.1rem; }\n .instruction { font-size: 0.8rem; color: #aaa; }\n\n \/* CANVAS *\/\n canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }\n\n \/* ETIQUETA FLUTUANTE (TOOLTIP) *\/\n .tooltip {\n position: absolute;\n background: rgba(0, 0, 0, 0.9);\n border: 1px solid var(--vec-result);\n padding: 8px 12px;\n border-radius: 4px;\n pointer-events: none;\n font-family: 'Courier New', monospace;\n font-size: 0.9rem;\n white-space: nowrap;\n display: none; \/* Escondido por defeito *\/\n z-index: 20;\n box-shadow: 0 0 15px rgba(0, 242, 255, 0.3);\n }\n .tooltip span { font-weight: bold; }\n\n \/* MENSAGEM DE SUCESSO *\/\n #hit-feedback {\n position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);\n font-size: 3rem; color: var(--target-note); font-weight: bold;\n text-shadow: 0 0 30px var(--target-note);\n opacity: 0; transition: opacity 0.2s; pointer-events: none;\n }\n #hit-feedback.show { opacity: 1; }\n\n \/* OVERLAY INICIAL *\/\n #boot-screen {\n position: absolute; top: 0; left: 0; width: 100%; height: 100%;\n background: var(--bg-color);\n display: flex; flex-direction: column; justify-content: center; align-items: center;\n z-index: 999;\n }\n .btn-primary {\n background: transparent; color: var(--vec-result);\n border: 1px solid var(--vec-result);\n padding: 15px 40px; font-size: 1rem; letter-spacing: 2px;\n text-transform: uppercase; cursor: pointer; margin-top: 20px;\n font-weight: bold; transition: all 0.3s;\n }\n .btn-primary:hover { background: var(--vec-result); color: #000; box-shadow: 0 0 20px var(--vec-result); }\n\n <\/style>\n<\/head>\n<body>\n\n <div id=\"boot-screen\">\n <h1 style=\"font-weight: 300; letter-spacing: 2px;\">SISTEMA MUSICAL <strong style=\"color:var(--vec-result)\">VETORIAL<\/strong><\/h1>\n <p style=\"color:#888;\">Eng. Gaspar do Amaral | Edi\u00e7\u00e3o Melodia<\/p>\n <button class=\"btn-primary\" id=\"btn-init\">CARREGAR “HINO DA ALEGRIA”<\/button>\n <\/div>\n\n <header>\n <div class=\"brand\">\n <h1>Laborat\u00f3rio Vetorial<\/h1>\n <div style=\"font-size: 0.8rem; color: #aaa\">Visualiza\u00e7\u00e3o em Tempo Real<\/div>\n <\/div>\n <div class=\"song-info\">\n <div class=\"song-title\">\u266b HINO DA ALEGRIA<\/div>\n <div class=\"instruction\">Alinhe o Vetor Verde com a Linha Dourada<\/div>\n <\/div>\n <\/header>\n\n <div id=\"hit-feedback\">ACERTOU!<\/div>\n \n <div id=\"cursor-tooltip\" class=\"tooltip\">\n P( <span id=\"tt-freq\" style=\"color:var(--vec-x)\">0<\/span> Hz , <span id=\"tt-amp\" style=\"color:var(--vec-y)\">0.0<\/span> )\n <\/div>\n\n <canvas id=\"canvas\"><\/canvas>\n\n <script>\n \/**\n * ============================================================\n * DADOS DA MELODIA (Hino da Alegria \/ Ode to Joy)\n * Frequ\u00eancias exatas para o aluno encontrar.\n * ============================================================\n *\/\n const MELODY = [\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"F\u00c1 (F4)\", freq: 349.23 },\n { note: \"SOL (G4)\", freq: 392.00 },\n { note: \"SOL (G4)\", freq: 392.00 },\n { note: \"F\u00c1 (F4)\", freq: 349.23 },\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"R\u00c9 (D4)\", freq: 293.66 },\n { note: \"D\u00d3 (C4)\", freq: 261.63 },\n { note: \"D\u00d3 (C4)\", freq: 261.63 },\n { note: \"R\u00c9 (D4)\", freq: 293.66 },\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"MI (E4)\", freq: 329.63 }, \/\/ Dotted\n { note: \"R\u00c9 (D4)\", freq: 293.66 }\n ];\n\n class App {\n constructor() {\n this.canvas = document.getElementById('canvas');\n this.ctx = this.canvas.getContext('2d');\n this.width = window.innerWidth;\n this.height = window.innerHeight;\n \n this.audioCtx = null;\n this.osc = null;\n this.gain = null;\n this.filter = null;\n this.analyser = null;\n \n this.state = {\n isPlaying: false,\n x: 0, y: 0,\n freq: 0, amp: 0,\n currentNoteIndex: 0,\n lastHitTime: 0\n };\n\n \/\/ Configura\u00e7\u00e3o F\u00edsica\n this.minFreq = 200; \/\/ Come\u00e7a um pouco antes do D\u00f3 central\n this.maxFreq = 600; \/\/ Vai at\u00e9 agudos razo\u00e1veis\n \n this.resize();\n window.addEventListener('resize', () => this.resize());\n this.bindEvents();\n this.loop();\n }\n\n resize() {\n this.width = window.innerWidth;\n this.height = window.innerHeight;\n this.canvas.width = this.width;\n this.canvas.height = this.height;\n }\n\n async initAudio() {\n if (!this.audioCtx) {\n this.audioCtx = new (window.AudioContext || window.webkitAudioContext)();\n this.analyser = this.audioCtx.createAnalyser();\n this.analyser.connect(this.audioCtx.destination);\n }\n if (this.audioCtx.state === 'suspended') await this.audioCtx.resume();\n \n document.getElementById('boot-screen').style.display = 'none';\n }\n\n startSound(x, y) {\n if (!this.audioCtx) return;\n if (this.osc) { this.osc.stop(); this.osc.disconnect(); }\n\n this.osc = this.audioCtx.createOscillator();\n this.osc.type = 'sawtooth';\n this.filter = this.audioCtx.createBiquadFilter();\n this.filter.type = 'lowpass';\n this.filter.Q.value = 8;\n this.gain = this.audioCtx.createGain();\n\n this.osc.connect(this.filter);\n this.filter.connect(this.gain);\n this.gain.connect(this.analyser);\n\n this.updatePhysics(x, y);\n this.gain.gain.setValueAtTime(0, this.audioCtx.currentTime);\n this.gain.gain.linearRampToValueAtTime(this.state.amp, this.audioCtx.currentTime + 0.05);\n \n this.osc.start();\n this.state.isPlaying = true;\n \n \/\/ Mostrar Tooltip\n document.getElementById('cursor-tooltip').style.display = 'block';\n }\n\n updatePhysics(x, y) {\n this.state.x = x;\n this.state.y = y;\n\n \/\/ Mapeamento Vetorial\n const pctX = x \/ this.width;\n const freq = this.minFreq + (pctX * (this.maxFreq - this.minFreq));\n \n const pctY = 1 - (y \/ this.height);\n const amp = Math.max(0, pctY);\n const cutoff = 100 + (Math.pow(pctY, 2) * 8000);\n\n this.state.freq = freq;\n this.state.amp = amp;\n\n if (this.state.isPlaying) {\n this.osc.frequency.setTargetAtTime(freq, this.audioCtx.currentTime, 0.02);\n this.gain.gain.setTargetAtTime(amp, this.audioCtx.currentTime, 0.05);\n this.filter.frequency.setTargetAtTime(cutoff, this.audioCtx.currentTime, 0.05);\n }\n\n \/\/ Atualizar Tooltip\n this.updateTooltip(x, y, freq, amp);\n \n \/\/ Verificar se acertou na nota da m\u00fasica\n this.checkMelodyHit(freq);\n }\n\n checkMelodyHit(currentFreq) {\n if (this.state.currentNoteIndex >= MELODY.length) return; \/\/ M\u00fasica acabou\n\n const target = MELODY[this.state.currentNoteIndex];\n const tolerance = 5; \/\/ Hz de margem de erro\n const diff = Math.abs(currentFreq - target.freq);\n\n \/\/ Debounce para n\u00e3o saltar notas muito r\u00e1pido\n const now = Date.now();\n if (diff < tolerance && (now - this.state.lastHitTime > 500)) {\n this.advanceNote();\n }\n }\n\n advanceNote() {\n this.state.lastHitTime = Date.now();\n this.state.currentNoteIndex++;\n \n \/\/ Feedback Visual\n const fb = document.getElementById('hit-feedback');\n fb.classList.add('show');\n setTimeout(() => fb.classList.remove('show'), 500);\n\n if (this.state.currentNoteIndex >= MELODY.length) {\n setTimeout(() => {\n this.state.currentNoteIndex = 0; \/\/ Reiniciar loop\n }, 2000);\n }\n }\n\n stopSound() {\n if (!this.state.isPlaying) return;\n const t = this.audioCtx.currentTime;\n this.gain.gain.cancelScheduledValues(t);\n this.gain.gain.setValueAtTime(this.gain.gain.value, t);\n this.gain.gain.exponentialRampToValueAtTime(0.001, t + 0.5);\n this.osc.stop(t + 0.6);\n this.state.isPlaying = false;\n \n \/\/ Esconder Tooltip\n document.getElementById('cursor-tooltip').style.display = 'none';\n }\n\n updateTooltip(x, y, freq, amp) {\n const tt = document.getElementById('cursor-tooltip');\n \/\/ Posicionar a etiqueta um pouco acima e \u00e0 direita do dedo\n tt.style.left = (x + 20) + 'px';\n tt.style.top = (y - 50) + 'px';\n \n document.getElementById('tt-freq').innerText = freq.toFixed(0);\n document.getElementById('tt-amp').innerText = amp.toFixed(2);\n }\n\n bindEvents() {\n const hStart = (e) => { e.preventDefault(); const t = e.touches ? e.touches[0] : e; this.startSound(t.clientX, t.clientY); };\n const hMove = (e) => { e.preventDefault(); if(this.state.isPlaying) { const t = e.touches ? e.touches[0] : e; this.updatePhysics(t.clientX, t.clientY); }};\n const hEnd = (e) => { e.preventDefault(); this.stopSound(); };\n\n this.canvas.addEventListener('mousedown', hStart);\n this.canvas.addEventListener('mousemove', hMove);\n this.canvas.addEventListener('mouseup', hEnd);\n this.canvas.addEventListener('mouseleave', hEnd);\n \n this.canvas.addEventListener('touchstart', hStart, {passive:false});\n this.canvas.addEventListener('touchmove', hMove, {passive:false});\n this.canvas.addEventListener('touchend', hEnd);\n\n document.getElementById('btn-init').addEventListener('click', () => this.initAudio());\n }\n\n loop() {\n requestAnimationFrame(() => this.loop());\n this.ctx.fillStyle = '#050a10';\n this.ctx.fillRect(0, 0, this.width, this.height);\n\n this.drawGrid();\n if (this.state.isPlaying) this.drawVector();\n this.drawMelodyGuide(); \/\/ Desenha a \"pauta\" vetorial\n }\n\n drawGrid() {\n const ox = 40, oy = this.height - 40;\n this.ctx.strokeStyle = 'rgba(255,255,255,0.1)';\n this.ctx.lineWidth = 1;\n\n \/\/ Eixos\n this.ctx.beginPath(); this.ctx.moveTo(ox, 0); this.ctx.lineTo(ox, oy); this.ctx.lineTo(this.width, oy); this.ctx.stroke();\n\n \/\/ Zero\n this.ctx.fillStyle = '#fff';\n this.ctx.font = '10px Arial';\n this.ctx.fillText(\"0,0\", ox - 10, oy + 20);\n }\n\n drawVector() {\n const ox = 40, oy = this.height - 40;\n const x = Math.max(ox, this.state.x);\n const y = Math.min(oy, this.state.y);\n\n \/\/ Vetor X (Verde)\n this.drawArrow(ox, oy, x, oy, '#00ff9d', 4);\n \/\/ Vetor Y (Magenta)\n this.drawArrow(ox, oy, ox, y, '#ff0055', 4);\n \/\/ Resultante (Ciano)\n this.drawArrow(ox, oy, x, y, '#00f2ff', 2);\n \n \/\/ Proje\u00e7\u00f5es\n this.ctx.setLineDash([4,4]);\n this.ctx.strokeStyle = 'rgba(255,255,255,0.3)';\n this.ctx.beginPath(); this.ctx.moveTo(x, oy); this.ctx.lineTo(x, y); this.ctx.lineTo(ox, y); this.ctx.stroke();\n this.ctx.setLineDash([]);\n }\n\n drawArrow(fx, fy, tx, ty, color, w) {\n const angle = Math.atan2(ty - fy, tx - fx);\n this.ctx.beginPath(); this.ctx.moveTo(fx, fy); this.ctx.lineTo(tx, ty);\n this.ctx.strokeStyle = color; this.ctx.lineWidth = w; this.ctx.stroke();\n \n \/\/ Seta\n const head = 10;\n this.ctx.beginPath();\n this.ctx.moveTo(tx, ty);\n this.ctx.lineTo(tx - head * Math.cos(angle - Math.PI\/6), ty - head * Math.sin(angle - Math.PI\/6));\n this.ctx.lineTo(tx - head * Math.cos(angle + Math.PI\/6), ty - head * Math.sin(angle + Math.PI\/6));\n this.ctx.fillStyle = color; this.ctx.fill();\n }\n\n drawMelodyGuide() {\n \/\/ Desenha a linha alvo da nota atual\n if (this.state.currentNoteIndex >= MELODY.length) return;\n\n const note = MELODY[this.state.currentNoteIndex];\n \n \/\/ Converter freq da nota para posi\u00e7\u00e3o X no ecr\u00e3\n \/\/ x = (freq - min) \/ (max - min) * width\n const percent = (note.freq - this.minFreq) \/ (this.maxFreq - this.minFreq);\n const targetX = percent * this.width;\n\n \/\/ Desenha a linha \"Alvo\"\n this.ctx.save();\n this.ctx.shadowBlur = 20;\n this.ctx.shadowColor = '#ffd700';\n this.ctx.strokeStyle = '#ffd700';\n this.ctx.lineWidth = 2;\n \n \/\/ Linha vertical pulsante\n this.ctx.globalAlpha = 0.5 + Math.sin(Date.now() \/ 200) * 0.2;\n this.ctx.beginPath();\n this.ctx.moveTo(targetX, 0);\n this.ctx.lineTo(targetX, this.height);\n this.ctx.stroke();\n\n \/\/ Nome da Nota\n this.ctx.globalAlpha = 1;\n this.ctx.fillStyle = '#ffd700';\n this.ctx.font = 'bold 20px Arial';\n this.ctx.fillText(`ALVO: ${note.note}`, targetX + 10, this.height \/ 2);\n this.ctx.font = '14px Courier New';\n this.ctx.fillText(`${note.freq} Hz`, targetX + 10, (this.height \/ 2) + 20);\n\n \/\/ Pr\u00f3ximas notas (Ghost)\n const nextNote = MELODY[this.state.currentNoteIndex + 1];\n if (nextNote) {\n const p2 = (nextNote.freq - this.minFreq) \/ (this.maxFreq - this.minFreq);\n const tx2 = p2 * this.width;\n this.ctx.fillStyle = 'rgba(255, 255, 255, 0.3)';\n this.ctx.fillText(`(Pr\u00f3x: ${nextNote.note})`, tx2 + 5, this.height \/ 2 + 50);\n this.ctx.strokeStyle = 'rgba(255, 255, 255, 0.1)';\n this.ctx.beginPath(); this.ctx.moveTo(tx2, 0); this.ctx.lineTo(tx2, this.height); this.ctx.stroke();\n }\n\n this.ctx.restore();\n }\n }\n\n const app = new App();\n\n <\/script>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>Sintetizador Vetorial | Melodia Edition SISTEMA MUSICAL VETORIAL Eng. Gaspar do Amaral | Edi\u00e7\u00e3o Melodia CARREGAR “HINO DA ALEGRIA” Laborat\u00f3rio Vetorial Visualiza\u00e7\u00e3o em Tempo Real \u266b HINO DA ALEGRIA Alinhe o Vetor Verde com a Linha Dourada ACERTOU! 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Gaspar do Amaral | Edi\u00e7\u00e3o Melodia CARREGAR “HINO DA ALEGRIA” Laborat\u00f3rio Vetorial Visualiza\u00e7\u00e3o em Tempo Real \u266b HINO DA ALEGRIA Alinhe o Vetor Verde com a Linha Dourada ACERTOU! 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{"id":889,"date":"2026-02-07T07:48:43","date_gmt":"2026-02-07T07:48:43","guid":{"rendered":"https:\/\/aprecisa.com\/ga\/?p=889"},"modified":"2026-02-07T08:10:24","modified_gmt":"2026-02-07T08:10:24","slug":"889","status":"publish","type":"post","link":"https:\/\/aprecisa.com\/ga\/2026\/02\/07\/889\/","title":{"rendered":""},"content":{"rendered":"\n\n\n\n \n \n Sintetizador Vetorial | Melodia Edition<\/title>\n <style>\n \/* ==========================================================================\n DESIGN SYSTEM: \"AEROSPACE & MUSIC\"\n ========================================================================== *\/\n :root {\n --bg-color: #050a10;\n --panel-bg: rgba(20, 30, 40, 0.85);\n --vec-result: #00f2ff; \/* Ciano *\/\n --vec-x: #00ff9d; \/* Verde *\/\n --vec-y: #ff0055; \/* Magenta *\/\n --target-note: #ffd700; \/* Dourado para a nota alvo *\/\n --font-stack: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;\n }\n\n body, html {\n margin: 0; padding: 0; width: 100%; height: 100%;\n background-color: var(--bg-color);\n color: #fff; font-family: var(--font-stack);\n overflow: hidden; user-select: none;\n }\n\n \/* HEADER *\/\n header {\n position: absolute; top: 0; left: 0; width: 100%;\n padding: 20px; box-sizing: border-box; pointer-events: none;\n display: flex; justify-content: space-between; z-index: 10;\n background: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent);\n }\n .brand h1 { margin: 0; font-size: 1.2rem; letter-spacing: 1px; text-transform: uppercase; color: var(--vec-result); }\n .song-info { text-align: right; }\n .song-title { color: var(--target-note); font-weight: bold; font-size: 1.1rem; }\n .instruction { font-size: 0.8rem; color: #aaa; }\n\n \/* CANVAS *\/\n canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }\n\n \/* ETIQUETA FLUTUANTE (TOOLTIP) *\/\n .tooltip {\n position: absolute;\n background: rgba(0, 0, 0, 0.9);\n border: 1px solid var(--vec-result);\n padding: 8px 12px;\n border-radius: 4px;\n pointer-events: none;\n font-family: 'Courier New', monospace;\n font-size: 0.9rem;\n white-space: nowrap;\n display: none; \/* Escondido por defeito *\/\n z-index: 20;\n box-shadow: 0 0 15px rgba(0, 242, 255, 0.3);\n }\n .tooltip span { font-weight: bold; }\n\n \/* MENSAGEM DE SUCESSO *\/\n #hit-feedback {\n position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);\n font-size: 3rem; color: var(--target-note); font-weight: bold;\n text-shadow: 0 0 30px var(--target-note);\n opacity: 0; transition: opacity 0.2s; pointer-events: none;\n }\n #hit-feedback.show { opacity: 1; }\n\n \/* OVERLAY INICIAL *\/\n #boot-screen {\n position: absolute; top: 0; left: 0; width: 100%; height: 100%;\n background: var(--bg-color);\n display: flex; flex-direction: column; justify-content: center; align-items: center;\n z-index: 999;\n }\n .btn-primary {\n background: transparent; color: var(--vec-result);\n border: 1px solid var(--vec-result);\n padding: 15px 40px; font-size: 1rem; letter-spacing: 2px;\n text-transform: uppercase; cursor: pointer; margin-top: 20px;\n font-weight: bold; transition: all 0.3s;\n }\n .btn-primary:hover { background: var(--vec-result); color: #000; box-shadow: 0 0 20px var(--vec-result); }\n\n <\/style>\n<\/head>\n<body>\n\n <div id=\"boot-screen\">\n <h1 style=\"font-weight: 300; letter-spacing: 2px;\">SISTEMA MUSICAL <strong style=\"color:var(--vec-result)\">VETORIAL<\/strong><\/h1>\n <p style=\"color:#888;\">Eng. Gaspar do Amaral | Edi\u00e7\u00e3o Melodia<\/p>\n <button class=\"btn-primary\" id=\"btn-init\">CARREGAR “HINO DA ALEGRIA”<\/button>\n <\/div>\n\n <header>\n <div class=\"brand\">\n <h1>Laborat\u00f3rio Vetorial<\/h1>\n <div style=\"font-size: 0.8rem; color: #aaa\">Visualiza\u00e7\u00e3o em Tempo Real<\/div>\n <\/div>\n <div class=\"song-info\">\n <div class=\"song-title\">\u266b HINO DA ALEGRIA<\/div>\n <div class=\"instruction\">Alinhe o Vetor Verde com a Linha Dourada<\/div>\n <\/div>\n <\/header>\n\n <div id=\"hit-feedback\">ACERTOU!<\/div>\n \n <div id=\"cursor-tooltip\" class=\"tooltip\">\n P( <span id=\"tt-freq\" style=\"color:var(--vec-x)\">0<\/span> Hz , <span id=\"tt-amp\" style=\"color:var(--vec-y)\">0.0<\/span> )\n <\/div>\n\n <canvas id=\"canvas\"><\/canvas>\n\n <script>\n \/**\n * ============================================================\n * DADOS DA MELODIA (Hino da Alegria \/ Ode to Joy)\n * Frequ\u00eancias exatas para o aluno encontrar.\n * ============================================================\n *\/\n const MELODY = [\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"F\u00c1 (F4)\", freq: 349.23 },\n { note: \"SOL (G4)\", freq: 392.00 },\n { note: \"SOL (G4)\", freq: 392.00 },\n { note: \"F\u00c1 (F4)\", freq: 349.23 },\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"R\u00c9 (D4)\", freq: 293.66 },\n { note: \"D\u00d3 (C4)\", freq: 261.63 },\n { note: \"D\u00d3 (C4)\", freq: 261.63 },\n { note: \"R\u00c9 (D4)\", freq: 293.66 },\n { note: \"MI (E4)\", freq: 329.63 },\n { note: \"MI (E4)\", freq: 329.63 }, \/\/ Dotted\n { note: \"R\u00c9 (D4)\", freq: 293.66 }\n ];\n\n class App {\n constructor() {\n this.canvas = document.getElementById('canvas');\n this.ctx = this.canvas.getContext('2d');\n this.width = window.innerWidth;\n this.height = window.innerHeight;\n \n this.audioCtx = null;\n this.osc = null;\n this.gain = null;\n this.filter = null;\n this.analyser = null;\n \n this.state = {\n isPlaying: false,\n x: 0, y: 0,\n freq: 0, amp: 0,\n currentNoteIndex: 0,\n lastHitTime: 0\n };\n\n \/\/ Configura\u00e7\u00e3o F\u00edsica\n this.minFreq = 200; \/\/ Come\u00e7a um pouco antes do D\u00f3 central\n this.maxFreq = 600; \/\/ Vai at\u00e9 agudos razo\u00e1veis\n \n this.resize();\n window.addEventListener('resize', () => this.resize());\n this.bindEvents();\n this.loop();\n }\n\n resize() {\n this.width = window.innerWidth;\n this.height = window.innerHeight;\n this.canvas.width = this.width;\n this.canvas.height = this.height;\n }\n\n async initAudio() {\n if (!this.audioCtx) {\n this.audioCtx = new (window.AudioContext || window.webkitAudioContext)();\n this.analyser = this.audioCtx.createAnalyser();\n this.analyser.connect(this.audioCtx.destination);\n }\n if (this.audioCtx.state === 'suspended') await this.audioCtx.resume();\n \n document.getElementById('boot-screen').style.display = 'none';\n }\n\n startSound(x, y) {\n if (!this.audioCtx) return;\n if (this.osc) { this.osc.stop(); this.osc.disconnect(); }\n\n this.osc = this.audioCtx.createOscillator();\n this.osc.type = 'sawtooth';\n this.filter = this.audioCtx.createBiquadFilter();\n this.filter.type = 'lowpass';\n this.filter.Q.value = 8;\n this.gain = this.audioCtx.createGain();\n\n this.osc.connect(this.filter);\n this.filter.connect(this.gain);\n this.gain.connect(this.analyser);\n\n this.updatePhysics(x, y);\n this.gain.gain.setValueAtTime(0, this.audioCtx.currentTime);\n this.gain.gain.linearRampToValueAtTime(this.state.amp, this.audioCtx.currentTime + 0.05);\n \n this.osc.start();\n this.state.isPlaying = true;\n \n \/\/ Mostrar Tooltip\n document.getElementById('cursor-tooltip').style.display = 'block';\n }\n\n updatePhysics(x, y) {\n this.state.x = x;\n this.state.y = y;\n\n \/\/ Mapeamento Vetorial\n const pctX = x \/ this.width;\n const freq = this.minFreq + (pctX * (this.maxFreq - this.minFreq));\n \n const pctY = 1 - (y \/ this.height);\n const amp = Math.max(0, pctY);\n const cutoff = 100 + (Math.pow(pctY, 2) * 8000);\n\n this.state.freq = freq;\n this.state.amp = amp;\n\n if (this.state.isPlaying) {\n this.osc.frequency.setTargetAtTime(freq, this.audioCtx.currentTime, 0.02);\n this.gain.gain.setTargetAtTime(amp, this.audioCtx.currentTime, 0.05);\n this.filter.frequency.setTargetAtTime(cutoff, this.audioCtx.currentTime, 0.05);\n }\n\n \/\/ Atualizar Tooltip\n this.updateTooltip(x, y, freq, amp);\n \n \/\/ Verificar se acertou na nota da m\u00fasica\n this.checkMelodyHit(freq);\n }\n\n checkMelodyHit(currentFreq) {\n if (this.state.currentNoteIndex >= MELODY.length) return; \/\/ M\u00fasica acabou\n\n const target = MELODY[this.state.currentNoteIndex];\n const tolerance = 5; \/\/ Hz de margem de erro\n const diff = Math.abs(currentFreq - target.freq);\n\n \/\/ Debounce para n\u00e3o saltar notas muito r\u00e1pido\n const now = Date.now();\n if (diff < tolerance && (now - this.state.lastHitTime > 500)) {\n this.advanceNote();\n }\n }\n\n advanceNote() {\n this.state.lastHitTime = Date.now();\n this.state.currentNoteIndex++;\n \n \/\/ Feedback Visual\n const fb = document.getElementById('hit-feedback');\n fb.classList.add('show');\n setTimeout(() => fb.classList.remove('show'), 500);\n\n if (this.state.currentNoteIndex >= MELODY.length) {\n setTimeout(() => {\n this.state.currentNoteIndex = 0; \/\/ Reiniciar loop\n }, 2000);\n }\n }\n\n stopSound() {\n if (!this.state.isPlaying) return;\n const t = this.audioCtx.currentTime;\n this.gain.gain.cancelScheduledValues(t);\n this.gain.gain.setValueAtTime(this.gain.gain.value, t);\n this.gain.gain.exponentialRampToValueAtTime(0.001, t + 0.5);\n this.osc.stop(t + 0.6);\n this.state.isPlaying = false;\n \n \/\/ Esconder Tooltip\n document.getElementById('cursor-tooltip').style.display = 'none';\n }\n\n updateTooltip(x, y, freq, amp) {\n const tt = document.getElementById('cursor-tooltip');\n \/\/ Posicionar a etiqueta um pouco acima e \u00e0 direita do dedo\n tt.style.left = (x + 20) + 'px';\n tt.style.top = (y - 50) + 'px';\n \n document.getElementById('tt-freq').innerText = freq.toFixed(0);\n document.getElementById('tt-amp').innerText = amp.toFixed(2);\n }\n\n bindEvents() {\n const hStart = (e) => { e.preventDefault(); const t = e.touches ? e.touches[0] : e; this.startSound(t.clientX, t.clientY); };\n const hMove = (e) => { e.preventDefault(); if(this.state.isPlaying) { const t = e.touches ? e.touches[0] : e; this.updatePhysics(t.clientX, t.clientY); }};\n const hEnd = (e) => { e.preventDefault(); this.stopSound(); };\n\n this.canvas.addEventListener('mousedown', hStart);\n this.canvas.addEventListener('mousemove', hMove);\n this.canvas.addEventListener('mouseup', hEnd);\n this.canvas.addEventListener('mouseleave', hEnd);\n \n this.canvas.addEventListener('touchstart', hStart, {passive:false});\n this.canvas.addEventListener('touchmove', hMove, {passive:false});\n this.canvas.addEventListener('touchend', hEnd);\n\n document.getElementById('btn-init').addEventListener('click', () => this.initAudio());\n }\n\n loop() {\n requestAnimationFrame(() => this.loop());\n this.ctx.fillStyle = '#050a10';\n this.ctx.fillRect(0, 0, this.width, this.height);\n\n this.drawGrid();\n if (this.state.isPlaying) this.drawVector();\n this.drawMelodyGuide(); \/\/ Desenha a \"pauta\" vetorial\n }\n\n drawGrid() {\n const ox = 40, oy = this.height - 40;\n this.ctx.strokeStyle = 'rgba(255,255,255,0.1)';\n this.ctx.lineWidth = 1;\n\n \/\/ Eixos\n this.ctx.beginPath(); this.ctx.moveTo(ox, 0); this.ctx.lineTo(ox, oy); this.ctx.lineTo(this.width, oy); this.ctx.stroke();\n\n \/\/ Zero\n this.ctx.fillStyle = '#fff';\n this.ctx.font = '10px Arial';\n this.ctx.fillText(\"0,0\", ox - 10, oy + 20);\n }\n\n drawVector() {\n const ox = 40, oy = this.height - 40;\n const x = Math.max(ox, this.state.x);\n const y = Math.min(oy, this.state.y);\n\n \/\/ Vetor X (Verde)\n this.drawArrow(ox, oy, x, oy, '#00ff9d', 4);\n \/\/ Vetor Y (Magenta)\n this.drawArrow(ox, oy, ox, y, '#ff0055', 4);\n \/\/ Resultante (Ciano)\n this.drawArrow(ox, oy, x, y, '#00f2ff', 2);\n \n \/\/ Proje\u00e7\u00f5es\n this.ctx.setLineDash([4,4]);\n this.ctx.strokeStyle = 'rgba(255,255,255,0.3)';\n this.ctx.beginPath(); this.ctx.moveTo(x, oy); this.ctx.lineTo(x, y); this.ctx.lineTo(ox, y); this.ctx.stroke();\n this.ctx.setLineDash([]);\n }\n\n drawArrow(fx, fy, tx, ty, color, w) {\n const angle = Math.atan2(ty - fy, tx - fx);\n this.ctx.beginPath(); this.ctx.moveTo(fx, fy); this.ctx.lineTo(tx, ty);\n this.ctx.strokeStyle = color; this.ctx.lineWidth = w; this.ctx.stroke();\n \n \/\/ Seta\n const head = 10;\n this.ctx.beginPath();\n this.ctx.moveTo(tx, ty);\n this.ctx.lineTo(tx - head * Math.cos(angle - Math.PI\/6), ty - head * Math.sin(angle - Math.PI\/6));\n this.ctx.lineTo(tx - head * Math.cos(angle + Math.PI\/6), ty - head * Math.sin(angle + Math.PI\/6));\n this.ctx.fillStyle = color; this.ctx.fill();\n }\n\n drawMelodyGuide() {\n \/\/ Desenha a linha alvo da nota atual\n if (this.state.currentNoteIndex >= MELODY.length) return;\n\n const note = MELODY[this.state.currentNoteIndex];\n \n \/\/ Converter freq da nota para posi\u00e7\u00e3o X no ecr\u00e3\n \/\/ x = (freq - min) \/ (max - min) * width\n const percent = (note.freq - this.minFreq) \/ (this.maxFreq - this.minFreq);\n const targetX = percent * this.width;\n\n \/\/ Desenha a linha \"Alvo\"\n this.ctx.save();\n this.ctx.shadowBlur = 20;\n this.ctx.shadowColor = '#ffd700';\n this.ctx.strokeStyle = '#ffd700';\n this.ctx.lineWidth = 2;\n \n \/\/ Linha vertical pulsante\n this.ctx.globalAlpha = 0.5 + Math.sin(Date.now() \/ 200) * 0.2;\n this.ctx.beginPath();\n this.ctx.moveTo(targetX, 0);\n this.ctx.lineTo(targetX, this.height);\n this.ctx.stroke();\n\n \/\/ Nome da Nota\n this.ctx.globalAlpha = 1;\n this.ctx.fillStyle = '#ffd700';\n this.ctx.font = 'bold 20px Arial';\n this.ctx.fillText(`ALVO: ${note.note}`, targetX + 10, this.height \/ 2);\n this.ctx.font = '14px Courier New';\n this.ctx.fillText(`${note.freq} Hz`, targetX + 10, (this.height \/ 2) + 20);\n\n \/\/ Pr\u00f3ximas notas (Ghost)\n const nextNote = MELODY[this.state.currentNoteIndex + 1];\n if (nextNote) {\n const p2 = (nextNote.freq - this.minFreq) \/ (this.maxFreq - this.minFreq);\n const tx2 = p2 * this.width;\n this.ctx.fillStyle = 'rgba(255, 255, 255, 0.3)';\n this.ctx.fillText(`(Pr\u00f3x: ${nextNote.note})`, tx2 + 5, this.height \/ 2 + 50);\n this.ctx.strokeStyle = 'rgba(255, 255, 255, 0.1)';\n this.ctx.beginPath(); 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Gaspar do Amaral | Edi\u00e7\u00e3o Melodia CARREGAR “HINO DA ALEGRIA” Laborat\u00f3rio Vetorial Visualiza\u00e7\u00e3o em Tempo Real \u266b HINO DA ALEGRIA Alinhe o Vetor Verde com a Linha Dourada ACERTOU! 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