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Diffstat (limited to 'themes/danix-xyz-hacker/assets/js/matrix-rain.js')
| -rw-r--r-- | themes/danix-xyz-hacker/assets/js/matrix-rain.js | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/themes/danix-xyz-hacker/assets/js/matrix-rain.js b/themes/danix-xyz-hacker/assets/js/matrix-rain.js new file mode 100644 index 0000000..53c55d8 --- /dev/null +++ b/themes/danix-xyz-hacker/assets/js/matrix-rain.js @@ -0,0 +1,157 @@ +// Matrix rain background effect +(function() { + // Bail out if user prefers reduced motion + if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) { + return; + } + + // Canvas and context + let canvas = document.getElementById('matrix-rain'); + if (!canvas) return; + const ctx = canvas.getContext('2d'); + + // State + let columns = []; + let frameCount = 0; + let colors = { accent: '#a855f7', accent2: '#00ff88', bg: '#060b10', head: '#ffffff' }; + + // Character set: 30% ASCII, 70% katakana + const ASCII = Array.from({ length: 94 }, (_, i) => String.fromCharCode(33 + i)); + const KATA = Array.from({ length: 96 }, (_, i) => String.fromCodePoint(0x30a0 + i)); + const CHARS = shuffle([...ASCII, ...KATA, ...KATA, ...KATA]); + + // Utility: shuffle array + function shuffle(arr) { + for (let i = arr.length - 1; i > 0; i--) { + const j = Math.floor(Math.random() * (i + 1)); + [arr[i], arr[j]] = [arr[j], arr[i]]; + } + return arr; + } + + // Utility: convert hex or rgb color to rgba string + function hexToRgba(color, alpha) { + const rgbMatch = color.match(/rgb\((\d+),\s*(\d+),\s*(\d+)\)/); + if (rgbMatch) { + return `rgba(${rgbMatch[1]}, ${rgbMatch[2]}, ${rgbMatch[3]}, ${alpha})`; + } + const hex = color.replace('#', ''); + const r = parseInt(hex.substring(0, 2), 16); + const g = parseInt(hex.substring(2, 4), 16); + const b = parseInt(hex.substring(4, 6), 16); + return `rgba(${r}, ${g}, ${b}, ${alpha})`; + } + + // Sample CSS variables based on current theme + function sampleColors() { + const style = getComputedStyle(document.documentElement); + const isDark = document.documentElement.classList.contains('theme-dark'); + colors.accent = style.getPropertyValue('--accent').trim(); + colors.accent2 = style.getPropertyValue('--accent2').trim(); + colors.bg = style.getPropertyValue('--bg').trim(); + // Head char: bright white in dark mode, deep purple-black in light mode + colors.head = isDark ? '#ffffff' : '#1a0533'; + } + + // Resize canvas to window dimensions + function resizeCanvas() { + canvas.width = window.innerWidth; + canvas.height = window.innerHeight; + ctx.font = '14px "JetBrains Mono", monospace'; + ctx.textBaseline = 'top'; + initColumns(); + } + + // Initialize columns for the current canvas width + function initColumns() { + columns = []; + const columnWidth = 14; + const columnCount = Math.floor(canvas.width / columnWidth); + + for (let i = 0; i < columnCount; i++) { + columns.push({ + x: i * columnWidth, + y: -Math.floor(Math.random() * 40), // stagger start above viewport + speed: 2 + Math.floor(Math.random() * 3), // 2-4 frames between drops + color: Math.random() < 0.6 ? 'accent2' : 'accent', // 60% green, 40% purple + charIndex: Math.floor(Math.random() * CHARS.length), + length: 8 + Math.floor(Math.random() * 13), // trail length 8-20 + }); + } + } + + // Set up MutationObserver for theme switching + function setupThemeObserver() { + const observer = new MutationObserver(function(mutations) { + for (const m of mutations) { + if (m.attributeName === 'class') { + sampleColors(); + break; + } + } + }); + observer.observe(document.documentElement, { + attributes: true, + attributeFilter: ['class'], + }); + } + + // Main animation loop + function drawFrame() { + frameCount++; + + // Fade layer: semi-transparent background fill + ctx.fillStyle = hexToRgba(colors.bg, 0.085); + ctx.fillRect(0, 0, canvas.width, canvas.height); + + // Draw each column + for (const col of columns) { + // Skip if not time to drop yet (per-column throttle) + if (frameCount % col.speed !== 0) continue; + + // Draw explicit trail in column color + ctx.fillStyle = colors[col.color]; + for (let i = 1; i <= col.length; i++) { + const trailY = (col.y - i) * 14; + if (trailY < 0) continue; + const trailCharIndex = (col.charIndex - i + CHARS.length) % CHARS.length; + ctx.fillText(CHARS[trailCharIndex], col.x, trailY); + } + + // Draw head character (bright) + ctx.fillStyle = colors.head; + const headCharIndex = col.charIndex % CHARS.length; + ctx.fillText(CHARS[headCharIndex], col.x, col.y * 14); + + // Advance column + col.y++; + col.charIndex = (col.charIndex + 1) % CHARS.length; + + // Reset when scrolled off screen + if (col.y * 14 > canvas.height + col.length * 14) { + col.y = -Math.floor(Math.random() * 20); + col.charIndex = Math.floor(Math.random() * CHARS.length); + col.color = Math.random() < 0.6 ? 'accent2' : 'accent'; + } + } + + requestAnimationFrame(drawFrame); + } + + // Initialize + sampleColors(); + resizeCanvas(); + setupThemeObserver(); + + // Debounced resize handler + let resizeTimer; + window.addEventListener('resize', function() { + clearTimeout(resizeTimer); + resizeTimer = setTimeout(resizeCanvas, 150); + }); + + // Start animation when fonts are ready + document.fonts.ready.then(function() { + requestAnimationFrame(drawFrame); + }); +})(); |
