hover-effects/test-dotmatrix.html at main · hsrambo07/hover-effects · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>LED Matrix Display Test</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 20px;
            background: #0a0a0a;
            color: white;
        }
        .container {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }
        .demo-image {
            max-width: 500px;
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 20px 0;
        }
        .controls {
            margin: 20px 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
        }
        .control {
            background: rgba(255, 255, 255, 0.1);
            padding: 15px;
            border-radius: 8px;
        }
        .control label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
        }
        .control input[type="range"] {
            width: 100%;
            margin-bottom: 5px;
        }
        .control .value {
            color: #00ffff;
            font-weight: bold;
        }
        .control select {
            width: 100%;
            padding: 5px;
            background: #333;
            color: white;
            border: 1px solid #555;
            border-radius: 4px;
        }
        .control input[type="checkbox"] {
            margin-right: 8px;
        }
        .presets {
            margin: 20px 0;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .preset-btn {
            background: #00ffff;
            color: #0a0a0a;
            border: none;
            padding: 10px 20px;
            margin: 5px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
        }
        .preset-btn:hover {
            background: #00cccc;
        }
        .info {
            background: rgba(0, 255, 255, 0.1);
            border: 1px solid rgba(0, 255, 255, 0.3);
            border-radius: 8px;
            padding: 15px;
            margin: 20px 0;
            text-align: left;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>🔵 LED Matrix Display Effect</h1>
        <p>Hover over the image to see it transform into an LED matrix display!</p>

        <div class="info">
            <strong>How it works:</strong> This effect replaces the image with a grid of LED-like dots. Each dot's brightness corresponds to the pixel intensity at that location. The effect appears within a circular radius around your mouse cursor.
        </div>

        <div class="presets">
            <button class="preset-btn" onclick="applyPreset('fine')">Fine Grid</button>
            <button class="preset-btn" onclick="applyPreset('medium')">Medium Grid</button>
            <button class="preset-btn" onclick="applyPreset('large')">Large LEDs</button>
            <button class="preset-btn" onclick="applyPreset('rgb')">RGB Color</button>
            <button class="preset-btn" onclick="applyPreset('retro')">Retro Mono</button>
        </div>

        <img src="https://picsum.photos/500/400?random=2"
             alt="Demo Image"
             class="demo-image"
             id="demo-image"
             crossorigin="anonymous">

        <div class="controls">
            <div class="control">
                <label for="radius">Effect Radius:</label>
                <input type="range" id="radius" min="30" max="300" value="120">
                <span class="value" id="radius-value">120</span>
            </div>
            <div class="control">
                <label for="ledSize">LED Size:</label>
                <input type="range" id="ledSize" min="2" max="15" value="6">
                <span class="value" id="ledSize-value">6</span>
            </div>
            <div class="control">
                <label for="ledSpacing">LED Spacing:</label>
                <input type="range" id="ledSpacing" min="4" max="25" value="8">
                <span class="value" id="ledSpacing-value">8</span>
            </div>
            <div class="control">
                <label for="softEdge">Soft Edge:</label>
                <input type="range" id="softEdge" min="0" max="50" value="20">
                <span class="value" id="softEdge-value">20</span>
            </div>
            <div class="control">
                <label for="colorMode">Color Mode:</label>
                <select id="colorMode">
                    <option value="mono">Mono (Cyan)</option>
                    <option value="rgb">RGB (Original Colors)</option>
                </select>
            </div>
            <div class="control">
                <label for="glow">Glow Effect:</label>
                <input type="checkbox" id="glow" checked>
                <span class="value" id="glow-value">On</span>
            </div>
        </div>
    </div>

    <script>
        // LED Matrix effect implementation
        class LEDMatrixDisplay {
            constructor(options = {}) {
                this.radius = options.radius || 120;
                this.ledSize = options.ledSize || 6;
                this.ledSpacing = options.ledSpacing || 8;
                this.softEdge = options.softEdge || 20;
                this.glow = options.glow !== false;
                this.colorMode = options.colorMode || 'mono';
                this.fadeExp = 2;

                this.element = null;
                this.canvas = null;
                this.ctx = null;
                this.tempCanvas = null;
                this.tempCtx = null;
                this.isHovering = false;
                this.mousePos = { x: 0, y: 0 };
                this.imageData = null;
                this.ledPath = null;

                this.buildLedPath();
            }

            buildLedPath() {
                this.ledPath = new Path2D();
                this.ledPath.arc(0, 0, this.ledSize / 2, 0, Math.PI * 2);
            }

            attach(element) {
                this.element = element;
                this.setupCanvas();
                this.setupEvents();
                this.updateImageData();
            }

            setupCanvas() {
                const rect = this.element.getBoundingClientRect();

                this.canvas = document.createElement('canvas');
                this.canvas.width = rect.width;
                this.canvas.height = rect.height;
                this.canvas.style.position = 'absolute';
                this.canvas.style.top = '0';
                this.canvas.style.left = '0';
                this.canvas.style.width = '100%';
                this.canvas.style.height = '100%';
                this.canvas.style.opacity = '0';
                this.canvas.style.transition = 'opacity 0.3s ease';
                this.canvas.style.pointerEvents = 'none';

                this.ctx = this.canvas.getContext('2d');
                this.ctx.imageSmoothingEnabled = false;

                this.tempCanvas = document.createElement('canvas');
                this.tempCtx = this.tempCanvas.getContext('2d');

                let wrapper = this.element.parentElement;
                if (!wrapper || !wrapper.classList.contains('led-matrix-wrapper')) {
                    wrapper = document.createElement('div');
                    wrapper.className = 'led-matrix-wrapper';
                    wrapper.style.position = 'relative';
                    wrapper.style.display = 'inline-block';
                    this.element.replaceWith(wrapper);
                    wrapper.appendChild(this.element);
                }
                wrapper.appendChild(this.canvas);
            }

            setupEvents() {
                const wrapper = this.element.parentElement;
                wrapper.addEventListener('mouseenter', (e) => {
                    this.isHovering = true;
                    const rect = this.element.getBoundingClientRect();
                    this.mousePos = {
                        x: e.clientX - rect.left,
                        y: e.clientY - rect.top
                    };
                    this.canvas.style.opacity = '1';
                    this.render();
                });

                wrapper.addEventListener('mouseleave', () => {
                    this.isHovering = false;
                    this.canvas.style.opacity = '0';
                    setTimeout(() => {
                        if (!this.isHovering && this.ctx) {
                            this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
                        }
                    }, 300);
                });

                wrapper.addEventListener('mousemove', (e) => {
                    const rect = this.canvas.getBoundingClientRect();
                    const scaleX = this.canvas.width / rect.width;
                    const scaleY = this.canvas.height / rect.height;
                    this.mousePos = {
                        x: (e.clientX - rect.left) * scaleX,
                        y: (e.clientY - rect.top) * scaleY
                    };
                });
            }

            updateImageData() {
                if (!this.element || !this.tempCanvas || !this.tempCtx || !this.canvas) return;

                const width = this.canvas.width;
                const height = this.canvas.height;

                // Calculate grid dimensions based on LED spacing
                const gridWidth = Math.floor(width / this.ledSpacing);
                const gridHeight = Math.floor(height / this.ledSpacing);

                this.tempCanvas.width = gridWidth;
                this.tempCanvas.height = gridHeight;
                this.tempCtx.drawImage(this.element, 0, 0, gridWidth, gridHeight);
                this.imageData = this.tempCtx.getImageData(0, 0, gridWidth, gridHeight);
            }

            render() {
                if (!this.isHovering || !this.imageData || !this.ctx || !this.ledPath) return;

                const width = this.canvas.width;
                const height = this.canvas.height;
                const gridWidth = Math.floor(width / this.ledSpacing);
                const gridHeight = Math.floor(height / this.ledSpacing);

                // Clear canvas with black background (LED matrix background)
                this.ctx.fillStyle = '#000000';
                this.ctx.fillRect(0, 0, width, height);

                const data = this.imageData.data;

                // Iterate through the LED grid
                for (let gridY = 0; gridY < gridHeight; gridY++) {
                    for (let gridX = 0; gridX < gridWidth; gridX++) {
                        // Calculate LED position on canvas
                        const ledX = (gridX + 0.5) * this.ledSpacing;
                        const ledY = (gridY + 0.5) * this.ledSpacing;

                        // Calculate distance from mouse
                        const dist = Math.hypot(ledX - this.mousePos.x, ledY - this.mousePos.y);

                        // Only render LEDs within the hover radius
                        if (dist < this.radius) {
                            const index = (gridY * gridWidth + gridX) * 4;
                            const r = data[index];
                            const g = data[index + 1];
                            const b = data[index + 2];

                            // Calculate brightness (0-1)
                            const brightness = (r + g + b) / (3 * 255);

                            // Calculate radial falloff with soft edge
                            let radialFalloff = 1;
                            if (dist > this.radius - this.softEdge) {
                                const edgeDistance = dist - (this.radius - this.softEdge);
                                radialFalloff = 1 - Math.pow(edgeDistance / this.softEdge, this.fadeExp);
                                radialFalloff = Math.max(0, radialFalloff);
                            }

                            // Calculate final alpha
                            const alpha = brightness * radialFalloff;

                            // Skip if alpha is too low
                            if (alpha < 0.05) continue;

                            // Determine LED color based on color mode
                            let fillColor;
                            if (this.colorMode === 'rgb') {
                                fillColor = `rgba(${r}, ${g}, ${b}, ${alpha})`;
                            } else {
                                // Mono mode - cyan
                                fillColor = `rgba(0, 255, 255, ${alpha})`;
                            }

                            // Configure glow effect if enabled
                            if (this.glow) {
                                this.ctx.shadowBlur = 4;
                                this.ctx.shadowColor = fillColor;
                            } else {
                                this.ctx.shadowBlur = 0;
                            }

                            // Set fill color and draw LED
                            this.ctx.fillStyle = fillColor;
                            this.ctx.save();
                            this.ctx.translate(ledX, ledY);
                            this.ctx.fill(this.ledPath);
                            this.ctx.restore();
                        }
                    }
                }

                // Reset shadow settings
                this.ctx.shadowBlur = 0;

                if (this.isHovering) {
                    requestAnimationFrame(() => this.render());
                }
            }

            // Setters
            setRadius(radius) { this.radius = radius; }
            setLedSize(ledSize) {
                this.ledSize = ledSize;
                this.buildLedPath();
            }
            setLedSpacing(ledSpacing) {
                this.ledSpacing = ledSpacing;
                this.updateImageData();
            }
            setSoftEdge(softEdge) { this.softEdge = softEdge; }
            setGlow(glow) { this.glow = glow; }
            setColorMode(colorMode) { this.colorMode = colorMode; }

            destroy() {
                if (this.canvas) {
                    this.canvas.remove();
                }
            }
        }

        // Initialize effect
        let ledEffect = null;

        function initEffect() {
            const image = document.getElementById('demo-image');
            if (ledEffect) ledEffect.destroy();

            ledEffect = new LEDMatrixDisplay({
                radius: parseInt(document.getElementById('radius').value),
                ledSize: parseInt(document.getElementById('ledSize').value),
                ledSpacing: parseInt(document.getElementById('ledSpacing').value),
                softEdge: parseInt(document.getElementById('softEdge').value),
                glow: document.getElementById('glow').checked,
                colorMode: document.getElementById('colorMode').value
            });

            ledEffect.attach(image);
        }

        function updateEffect() {
            if (!ledEffect) return;
            ledEffect.setRadius(parseInt(document.getElementById('radius').value));
            ledEffect.setLedSize(parseInt(document.getElementById('ledSize').value));
            ledEffect.setLedSpacing(parseInt(document.getElementById('ledSpacing').value));
            ledEffect.setSoftEdge(parseInt(document.getElementById('softEdge').value));
            ledEffect.setGlow(document.getElementById('glow').checked);
            ledEffect.setColorMode(document.getElementById('colorMode').value);
        }

        function applyPreset(preset) {
            const presets = {
                small: { radius: 80, ledSize: 3, ledSpacing: 4, softEdge: 15, glow: true, colorMode: 'mono' },
                medium: { radius: 120, ledSize: 4, ledSpacing: 5, softEdge: 20, glow: true, colorMode: 'mono' },
                large: { radius: 160, ledSize: 6, ledSpacing: 7, softEdge: 25, glow: true, colorMode: 'mono' },
                rgb: { radius: 120, ledSize: 4, ledSpacing: 5, softEdge: 20, glow: true, colorMode: 'rgb' },
                noGlow: { radius: 120, ledSize: 4, ledSpacing: 5, softEdge: 20, glow: false, colorMode: 'mono' }
            };

            const config = presets[preset];
            if (config) {
                document.getElementById('radius').value = config.radius;
                document.getElementById('ledSize').value = config.ledSize;
                document.getElementById('ledSpacing').value = config.ledSpacing;
                document.getElementById('softEdge').value = config.softEdge;
                document.getElementById('glow').checked = config.glow;
                document.getElementById('colorMode').value = config.colorMode;
                updateValues();
                updateEffect();
            }
        }

        function updateValues() {
            document.getElementById('radius-value').textContent = document.getElementById('radius').value;
            document.getElementById('ledSize-value').textContent = document.getElementById('ledSize').value;
            document.getElementById('ledSpacing-value').textContent = document.getElementById('ledSpacing').value;
            document.getElementById('softEdge-value').textContent = document.getElementById('softEdge').value;
            document.getElementById('glow-value').textContent = document.getElementById('glow').checked ? 'On' : 'Off';
        }

        // Event listeners
        ['radius', 'ledSize', 'ledSpacing', 'softEdge'].forEach(id => {
            document.getElementById(id).addEventListener('input', () => {
                updateValues();
                updateEffect();
            });
        });

        document.getElementById('glow').addEventListener('change', () => {
            updateValues();
            updateEffect();
        });

        document.getElementById('colorMode').addEventListener('change', () => {
            updateEffect();
        });

        // Initialize when image loads
        document.getElementById('demo-image').addEventListener('load', initEffect);
        if (document.getElementById('demo-image').complete) {
            initEffect();
        }

        updateValues();
    </script>
</body>
</html>