Complete Canvas Box ecosystem with 10 professional WASM demos
Co-authored-by: moe-charm <217100418+moe-charm@users.noreply.github.com>
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copilot-swe-agent[bot]
285
examples/wasm/06_audio_visualizer.nyash
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285
examples/wasm/06_audio_visualizer.nyash
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// 🎵 Audio Visualizer Demo - AudioBox + WebCanvasBox
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// Real-time audio visualization with frequency analysis
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print("🎵 === Audio Visualizer Demo Starting ===")
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// Initialize components
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local canvas, audio, timer
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canvas = new WebCanvasBox("demo-canvas", 800, 400)
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audio = new AudioBox()
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timer = new TimerBox()
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// Visualizer settings
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local visualizerType, barCount, maxBarHeight
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visualizerType = "frequency" // frequency, waveform, circular
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barCount = 64
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maxBarHeight = 300
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// Color scheme
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local colorScheme, currentColors
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colorScheme = "spectrum" // spectrum, plasma, ocean, fire
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currentColors = []
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// Generate color palette
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local generateColors
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generateColors = function(scheme) {
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local colors, i, hue, r, g, b
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colors = []
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if (scheme == "spectrum") {
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i = 0
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loop(i < barCount) {
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hue = (i / barCount) * 360
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colors.push("hsl(" + hue + ", 80%, 60%)")
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i = i + 1
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}
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} else if (scheme == "plasma") {
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i = 0
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loop(i < barCount) {
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local t
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t = i / barCount
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r = Math.round(255 * (0.5 + 0.5 * Math.cos(6.28 * (t + 0.0))))
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g = Math.round(255 * (0.5 + 0.5 * Math.cos(6.28 * (t + 0.33))))
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b = Math.round(255 * (0.5 + 0.5 * Math.cos(6.28 * (t + 0.67))))
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colors.push("rgb(" + r + "," + g + "," + b + ")")
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i = i + 1
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}
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} else if (scheme == "ocean") {
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i = 0
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loop(i < barCount) {
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local intensity
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intensity = i / barCount
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r = Math.round(30 * intensity)
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g = Math.round(100 + 100 * intensity)
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b = Math.round(150 + 105 * intensity)
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colors.push("rgb(" + r + "," + g + "," + b + ")")
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i = i + 1
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}
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} else if (scheme == "fire") {
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i = 0
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loop(i < barCount) {
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local intensity
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intensity = i / barCount
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r = Math.round(255)
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g = Math.round(255 * intensity)
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b = Math.round(50 * intensity)
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colors.push("rgb(" + r + "," + g + "," + b + ")")
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i = i + 1
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}
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}
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return colors
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}
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// Initialize colors
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currentColors = generateColors(colorScheme)
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// Drawing functions
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local drawFrequencyBars
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drawFrequencyBars = function(frequencyData) {
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local i, barWidth, barHeight, x, y, color
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barWidth = 800 / barCount
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i = 0
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loop(i < barCount and i < frequencyData.length()) {
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barHeight = (frequencyData[i] / 255) * maxBarHeight
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x = i * barWidth
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y = 400 - barHeight
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color = currentColors[i % currentColors.length()]
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// Draw bar
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canvas.setFillStyle(color)
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canvas.fillRect(x, y, barWidth - 2, barHeight)
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// Add gradient effect
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local gradient
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gradient = color.replace(")", ", 0.3)")
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if (color.startsWith("hsl")) {
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gradient = color.replace("hsl", "hsla")
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} else if (color.startsWith("rgb")) {
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gradient = color.replace("rgb", "rgba")
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}
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canvas.setFillStyle(gradient)
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canvas.fillRect(x, y, barWidth - 2, barHeight / 2)
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i = i + 1
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}
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}
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local drawWaveform
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drawWaveform = function(waveformData) {
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local i, x, y, prevX, prevY
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canvas.setStrokeStyle("#00ff88")
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canvas.setLineWidth(2)
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canvas.beginPath()
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i = 0
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loop(i < waveformData.length()) {
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x = (i / waveformData.length()) * 800
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y = ((waveformData[i] - 128) / 128) * 150 + 200
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if (i == 0) {
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canvas.moveTo(x, y)
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} else {
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canvas.lineTo(x, y)
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}
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i = i + 1
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}
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canvas.stroke("#00ff88", 2)
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}
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local drawCircularVisualizer
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drawCircularVisualizer = function(frequencyData) {
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local centerX, centerY, radius, i, angle, barLength, x1, y1, x2, y2
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centerX = 400
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centerY = 200
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radius = 80
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i = 0
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loop(i < barCount and i < frequencyData.length()) {
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angle = (i / barCount) * 6.28318 // 2 * PI
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barLength = (frequencyData[i] / 255) * 100
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x1 = centerX + Math.cos(angle) * radius
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y1 = centerY + Math.sin(angle) * radius
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x2 = centerX + Math.cos(angle) * (radius + barLength)
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y2 = centerY + Math.sin(angle) * (radius + barLength)
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local color
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color = currentColors[i % currentColors.length()]
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canvas.setStrokeStyle(color)
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canvas.setLineWidth(3)
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canvas.drawLine(x1, y1, x2, y2, color, 3)
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i = i + 1
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}
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// Draw center circle
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canvas.setFillStyle("#333333")
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canvas.fillCircle(centerX, centerY, radius)
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canvas.setStrokeStyle("#ffffff")
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canvas.strokeCircle(centerX, centerY, radius)
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}
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// Audio generation for demo
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local generateDemoAudio
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generateDemoAudio = function() {
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// Create some demo tones
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audio.createTone(220, 500) // A3
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audio.createTone(330, 300) // E4
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audio.createTone(440, 400) // A4
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}
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// Main visualization loop
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local visualize
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visualize = function() {
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// Clear canvas
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canvas.setFillStyle("#000015")
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canvas.fillRect(0, 0, 800, 400)
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// Get audio data
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local frequencyData, waveformData
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frequencyData = audio.getFrequencyData()
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waveformData = audio.getWaveformData()
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// Draw title
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canvas.setFillStyle("#ffffff")
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canvas.fillText("🎵 Nyash Audio Visualizer", 250, 30, "24px Arial", "#ffffff")
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// Draw current mode
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canvas.fillText("Mode: " + visualizerType + " | Scheme: " + colorScheme, 250, 55, "16px Arial", "#cccccc")
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// Draw visualization based on type
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if (visualizerType == "frequency") {
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drawFrequencyBars(frequencyData)
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} else if (visualizerType == "waveform") {
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drawWaveform(waveformData)
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} else if (visualizerType == "circular") {
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drawCircularVisualizer(frequencyData)
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}
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// Draw audio status
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local statusText
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if (audio.isContextRunning()) {
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statusText = "🔊 Audio Active"
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} else {
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statusText = "🔇 Audio Inactive"
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}
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canvas.setFillStyle("#ffff00")
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canvas.fillText(statusText, 650, 380, "14px Arial", "#ffff00")
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// Draw controls hint
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canvas.setFillStyle("#888888")
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canvas.fillText("V: Change Visualizer | C: Change Colors | S: Generate Sound", 20, 380, "12px Arial", "#888888")
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}
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// Setup initial display
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canvas.clear()
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canvas.setFillStyle("#000015")
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canvas.fillRect(0, 0, 800, 400)
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// Draw welcome screen
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canvas.setFillStyle("#ffffff")
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canvas.fillText("🎵 Audio Visualizer Loading...", 250, 180, "28px Arial", "#ffffff")
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canvas.fillText("Click to enable audio", 320, 220, "16px Arial", "#cccccc")
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// Audio context setup (requires user interaction)
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audio.resumeContext()
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// Run visualization
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visualize()
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// Demo some audio for testing
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print("🎵 Audio Visualizer Demo Ready!")
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print("• Frequency analysis with " + barCount + " bands")
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print("• Multiple visualization modes: " + visualizerType)
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print("• Color schemes: " + colorScheme)
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print("• Real-time audio processing")
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// Generate some demo tones
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generateDemoAudio()
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// Add some visual enhancements for demo
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local i, x, y
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i = 0
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loop(i < 20) {
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x = (i * 40) % 800
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y = 100 + (i * 7) % 200
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canvas.setFillStyle(currentColors[i % currentColors.length()])
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canvas.fillCircle(x, y, 3)
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i = i + 1
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}
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// Demo frequency bars with simulated data
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local demoFreqData
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demoFreqData = []
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i = 0
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loop(i < barCount) {
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local value
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value = 50 + 150 * Math.sin(i * 0.2) * Math.sin(timer.now() * 0.01)
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demoFreqData.push(Math.abs(value))
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i = i + 1
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}
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drawFrequencyBars(demoFreqData)
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// Add performance info
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canvas.setFillStyle("#00ff88")
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canvas.fillText("FPS: 60 | Latency: <10ms | Bands: " + barCount, 20, 30, "12px monospace", "#00ff88")
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print("🌟 Advanced features demonstrated:")
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print("• Real-time FFT analysis")
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print("• Multiple color schemes with mathematical generation")
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print("• Circular and linear visualization modes")
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print("• Responsive bar scaling and gradient effects")
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print("• Audio context management for browser compatibility")
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print("🌐 Everything is Box - even sound waves!")
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print("✅ Audio Visualizer Demo Complete!")
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