Vdash Making A: New Dash -p3-

record(data) if (!this.isRecording) return; this.buffer.push( timestamp: Date.now(), ...data );

// Needle ctx.save(); ctx.translate(x, y); ctx.rotate(angle); ctx.beginPath(); ctx.moveTo(radius - 20, 0); ctx.lineTo(radius + 10, 0); ctx.lineWidth = 4; ctx.stroke(); ctx.restore();

VDash.setTheme = function(themeName) document.documentElement.setAttribute('data-theme', themeName); localStorage.setItem('vdash-theme', themeName); ; function drawGauge(ctx, x, y, radius, value, minVal, maxVal) const angle = (value - minVal) / (maxVal - minVal) * Math.PI * 1.5 - Math.PI * 0.75; // Background arc ctx.beginPath(); ctx.arc(x, y, radius, -0.75 * Math.PI, 0.75 * Math.PI); ctx.strokeStyle = '#444'; ctx.lineWidth = 15; ctx.stroke();

4.1 Dynamic Theming /* themes/racing.css */ :root[data-theme="racing"] --primary: #ff3300; --secondary: #222; --background: radial-gradient(circle at 30% 10%, #0a0a0a, #000); --needle-glow: 0 0 8px #ff3300; VDash Making A New Dash -P3-

// Draw once per frame drawCanvas(); updateDOM();

requestAnimationFrame(() => this.tick());

const utterance = new SpeechSynthesisUtterance(message); utterance.rate = 1.2; utterance.pitch = 1.0; synth.speak(utterance); record(data) if (

export() return JSON.stringify(this.buffer);

let lastSpeed = 0, lastTime = 0; function predictSpeed() const now = performance.now(); const dt = (now - lastTime) / 1000; const acceleration = (currentSpeed - lastSpeed) / dt; const predicted = currentSpeed + acceleration * 0.05; // 50ms ahead lastSpeed = currentSpeed; lastTime = now; return predicted;

function renderIfDirty() if (dirtyFlags.speed) updateSpeedDisplay(); if (dirtyFlags.rpm) updateRPMNeedle(); // Reset flags after render this.isRecording = false

const EventBus = { events: {}, on(event, callback) ... , emit(event, data) ... , off(event, callback) ... }; 2.1 Canvas vs DOM | Feature | Canvas | DOM | |---------|--------|-----| | Complex graphics | ✅ Excellent | ❌ Slow | | Text rendering | ⚠️ Manual | ✅ Easy | | Dynamic elements | ❌ Redraw all | ✅ Selective | | Performance | ✅ GPU accelerated | ⚠️ Layout thrashing |

class TelemetryRecorder constructor() this.buffer = []; this.isRecording = false; start() this.isRecording = true;

Use inline SVG for crisp, scalable dashes: