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Ruleta de Decisiones
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CSS
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body { font-family: Arial, sans-serif; text-align: center; background: #222; color: #fff; } label, input, button { margin: 10px; font-size: 18px; } .wheel-container { position: relative; margin: 40px auto; width: 500px; height: 500px; } .pointer { position: absolute; top: 0; left: 50%; width: 0; height: 0; border-left: 20px solid transparent; border-right: 20px solid transparent; border-bottom: 40px solid red; transform: translateX(-50%); z-index: 2; } canvas { border-radius: 50%; background: #fff; }
JS
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const canvas = document.getElementById('wheel'); const ctx = canvas.getContext('2d'); const spinBtn = document.getElementById('spin'); const generateBtn = document.getElementById('generate'); const numSegmentsInput = document.getElementById('numSegments'); const result = document.getElementById('result'); let segments = []; let colors = []; let startAngle = 0; let arc = 0; let spinAngle = 0; let spinning = false; function randomColor() { const r = Math.floor(Math.random() * 200 + 30); const g = Math.floor(Math.random() * 200 + 30); const b = Math.floor(Math.random() * 200 + 30); return `rgb(${r}, ${g}, ${b})`; } function drawWheel() { const numSegments = segments.length; arc = (2 * Math.PI) / numSegments; ctx.clearRect(0, 0, canvas.width, canvas.height); for (let i = 0; i < numSegments; i++) { const angle = startAngle + i * arc; ctx.beginPath(); ctx.moveTo(250, 250); ctx.arc(250, 250, 250, angle, angle + arc); ctx.fillStyle = colors[i]; ctx.fill(); ctx.save(); ctx.translate(250, 250); ctx.rotate(angle + arc / 2); ctx.textAlign = "right"; ctx.fillStyle = "#000"; ctx.font = "bold 20px Arial"; ctx.fillText(segments[i], 230, 10); ctx.restore(); } } function generateWheel() { const numSegments = parseInt(numSegmentsInput.value); segments = []; colors = []; for (let i = 1; i <= numSegments; i++) { segments.push(`Opción ${i}`); colors.push(randomColor()); } drawWheel(); } function spinWheel() { if (spinning) return; spinning = true; result.textContent = ''; const spins = Math.floor(Math.random() * 5 + 5); // vueltas enteras const finalAngle = Math.random() * 2 * Math.PI; // ángulo extra const totalRotation = spins * 2 * Math.PI + finalAngle; const duration = 4000; // duración en ms const start = performance.now(); function animate(time) { const elapsed = time - start; const progress = Math.min(elapsed / duration, 1); // Ease-out con función cúbica const easedProgress = 1 - Math.pow(1 - progress, 3); startAngle = totalRotation * easedProgress; drawWheel(); if (progress < 1) { requestAnimationFrame(animate); } else { spinning = false; const degrees = (startAngle * 180) / Math.PI + 90; const arcd = (arc * 180) / Math.PI; const index = Math.floor((360 - (degrees % 360)) / arcd) % segments.length; result.textContent = `¡Ganaste: ${segments[index]}!`; } } requestAnimationFrame(animate); } generateBtn.addEventListener('click', generateWheel); spinBtn.addEventListener('click', spinWheel); generateWheel();