Codestin Search App

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<!DOCTYPE html>

<head>

<title>NeonFlux - Interactive WebGL Particle System</title>

{

"imports": {

"three": "https://unpkg.com/[email protected]/build/three.module.js",

"three/addons/": "https://unpkg.com/[email protected]/examples/jsm/",

"@mediapipe/tasks-vision": "https://cdn.jsdelivr.net/npm/@mediapipe/[email protected]/+esm"

}

</script>

<style>

body {

margin: 0;

overflow: hidden;

background-color: #000;

font-family: 'Orbitron', sans-serif;

user-select: none;

}

/* Scanlines */

#scanlines {

position: absolute;

top: 0;

left: 0;

width: 100%;

height: 100%;

background: linear-gradient(

to bottom,

rgba(255,255,255,0),

rgba(255,255,255,0) 50%,

rgba(0,0,0,0.2) 50%,

rgba(0,0,0,0.2)

);

background-size: 100% 4px;

opacity: 0.35;

pointer-events: none;

z-index: 10;

}

/* Vignette */

#vignette {

position: absolute;

top: 0;

left: 0;

width: 100%;

height: 100%;

background: radial-gradient(circle, transparent 50%, rgba(0,0,0,0.8) 100%);

pointer-events: none;

z-index: 11;

}

/* HUD */

.hud-panel {

position: absolute;

color: #0ff;

text-shadow: 0 0 5px #0ff;

font-size: 14px;

z-index: 12;

pointer-events: none;

}

#hud-tl { top: 20px; left: 20px; text-align: left; }

#hud-tr { top: 20px; right: 20px; text-align: right; }

#hud-bl { bottom: 20px; left: 20px; text-align: left; }

#hud-br { bottom: 20px; right: 20px; text-align: right; }

.label {

color: #0088aa;

font-size: 10px;

text-transform: uppercase;

}

.value {

font-weight: bold;

font-size: 16px;

}

/* Video Input (Background) */

#webcam {

position: absolute;

top: 0;

left: 0;

width: 100%;

height: 100%;

object-fit: cover;

z-index: 0;

transform: scaleX(-1); /* Mirror effect */

}

/* Canvas needs to be above video */

canvas {

position: absolute;

top: 0;

left: 0;

z-index: 5;

pointer-events: none;

}

</style>

</head>

<body>

<div class="label">System Status</div>

<div class="value">ONLINE</div>

</div>

<div class="label">Particle Count</div>

</div>

<div class="value" id="lh-status">NOT DETECTED</div>

</div>

<div class="label">Right Hand</div>

<div class="value" id="rh-status">NOT DETECTED</div>

</div>

<span style="color: #0ff; font-size: 12px;">SETTINGS</span>

</div>

<label style="font-size: 10px; color: #0088aa;">1 FINGER:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">2 FINGERS:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">3 FINGERS:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">4 FINGERS:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">5 FINGERS:</label>

</div>

<div style="color: #0ff; font-size: 11px; font-weight: bold; margin-top: 15px; margin-bottom: 5px; border-bottom: 1px solid #0ff;">RIGHT HAND</div>

<label style="font-size: 10px; color: #0088aa;">1 FINGER:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">2 FINGERS:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">3 FINGERS:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">4 FINGERS:</label>

</div>

<label style="font-size: 10px; color: #0088aa;">5 FINGERS:</label>

</div>

<div style="color: #0ff; font-size: 11px; font-weight: bold; margin-top: 15px; margin-bottom: 5px; border-bottom: 1px solid #0ff;">EFFECTS</div>

<label style="font-size: 10px; color: #0088aa;">THEME TEXT:</label>

</div>

<label for="scanlines-toggle" style="font-size: 10px; color: #0088aa;">SCANLINES</label>

</div>

<button onclick="updateCustomText()" style="background: #0088aa; color: #000; border: none; padding: 5px 10px; font-family: 'Orbitron', sans-serif; cursor: pointer; margin-top: 5px; width: 100%;">UPDATE</button>

</div>

import * as THREE from 'three';

import { FilesetResolver, HandLandmarker } from '@mediapipe/tasks-vision';

// --- Configuration ---

const PARTICLE_COUNT = 50000;

const PARTICLE_SIZE = 3.0;

const LERP_FACTOR = 0.24;

const TEXT_CANVAS_WIDTH = 1400;

const TEXT_CANVAS_HEIGHT = 520;

const TEXT_SAMPLE_STEP = 3;

// Colors

const COLOR_NEON_BLUE = new THREE.Color(0x00FFFF);

const COLOR_NEON_YELLOW = new THREE.Color(0xFFFF00);

const COLOR_NEON_PINK = new THREE.Color(0xFF00FF);

const COLOR_NEON_GREEN = new THREE.Color(0x00FF88);

const COLOR_ORANGE = new THREE.Color(0xFF8800);

// --- State ---

let width = window.innerWidth;

let height = window.innerHeight;

let particlesData = []; // Store { bx, by, bz } (base/target pos)

// Dynamic Text State

const gestureText = {

1: "First", // L1

2: "Second", // L2

3: "Third", // L3

4: "Fourth", // L4

5: "Bye", // L5

6: "First", // R1

7: "Second", // R2

8: "Third", // R3

9: "Fourth", // R4

10: "Bye" // R5

};

let themeText = "Screen Interaction System";

// ... existing code ...

// Expose function to window for button click

window.updateCustomText = function() {

const inputs = [];

for(let i=1; i<=10; i++) {

const el = document.getElementById('text-' + i);

if(el) {

const val = el.value;

if(val) gestureText[i] = val;

inputs.push(val);

}

const themeInput = document.getElementById('theme-text');

if (themeInput && themeInput.value) {

themeText = themeInput.value;

inputs.push(themeText);

}

// Re-generate caches

inputs.forEach(str => {

if(str && !textCache[str]) {

textCache[str] = generateTextCoordinates(str);

}

});

console.log("System Updated", gestureText);

};

window.toggleSettings = function() {

const content = document.getElementById('settings-content');

const icon = document.getElementById('settings-toggle-icon');

if (content.style.display === 'none') {

content.style.display = 'block';

icon.innerText = '▼';

} else {

content.style.display = 'none';

icon.innerText = '▲';

}

};

const scanlinesEl = document.getElementById('scanlines');

let scanlinesEnabled = true;

window.setScanlinesEnabled = function(enabled) {

scanlinesEnabled = Boolean(enabled);

if (scanlinesEl) {

scanlinesEl.style.display = scanlinesEnabled ? 'block' : 'none';

}

};

window.setScanlinesEnabled(scanlinesEnabled);

let handLandmarker = undefined;

let video = document.getElementById('webcam');

let lastVideoTime = -1;

let lhDetected = false;

let rhDetected = false;

// Gestures

let lhFingers = 0;

let rhFingers = 0;

let rhOpen = false;

// Visual State

let currentTargetShape = 'idle'; // 'text', 'catch', 'nebula', 'sphere', 'idle'

let currentText = "First";

let targetColor = COLOR_NEON_BLUE;

let scatterPos = new THREE.Vector3(9999, 9999, 0); // Right hand scatter center

let isDualCombo = false;

let leftHandPalmPos = new THREE.Vector3(0,0,0);

// Dynamic Appearance

let currentSize = 2.4; // Start with default

let currentOpacity = 1.0;

const TARGET_SIZE_IDLE = 1.0;

const TARGET_SIZE_ACTIVE = 8.0;

const TARGET_OPACITY_IDLE = 0.3;

const TARGET_OPACITY_ACTIVE = 1.0;

// FPS

let lastTime = performance.now();

let frameCount = 0;

// --- Three.js Init ---

const scene = new THREE.Scene();

// Perspective camera for 3D feel

const camera = new THREE.PerspectiveCamera(75, width / height, 0.1, 2000);

camera.position.z = 800;

const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });

renderer.setSize(width, height);

renderer.setPixelRatio(window.devicePixelRatio);

document.body.appendChild(renderer.domElement);

// --- Particles ---

const geometry = new THREE.BufferGeometry();

const positions = new Float32Array(PARTICLE_COUNT * 3);

const colors = new Float32Array(PARTICLE_COUNT * 3);

// Initial random positions

for (let i = 0; i < PARTICLE_COUNT; i++) {

positions[i * 3] = (Math.random() - 0.5) * 2000;

positions[i * 3 + 1] = (Math.random() - 0.5) * 1000;

positions[i * 3 + 2] = (Math.random() - 0.5) * 1000;

// Base data for animation

particlesData.push({

tx: 0, ty: 0, tz: 0, // Target position

vx: 0, vy: 0, vz: 0, // Velocity (unused mostly due to direct lerp, but good for physics)

phase: Math.random() * Math.PI * 2 // For random motions

});

// Init color white

colors[i * 3] = 1;

colors[i * 3 + 1] = 1;

colors[i * 3 + 2] = 1;

}

geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));

geometry.setAttribute('color', new THREE.BufferAttribute(colors, 3));

// Create texture for soft glow

const canvas = document.createElement('canvas');

canvas.width = 32;

canvas.height = 32;

const ctx = canvas.getContext('2d');

const grad = ctx.createRadialGradient(16,16,0,16,16,16);

grad.addColorStop(0, 'rgba(255,255,255,1)');

grad.addColorStop(1, 'rgba(255,255,255,0)');

ctx.fillStyle = grad;

ctx.fillRect(0,0,32,32);

const texture = new THREE.CanvasTexture(canvas);

const material = new THREE.PointsMaterial({

size: PARTICLE_SIZE,

map: texture,

vertexColors: true,

blending: THREE.AdditiveBlending,

depthWrite: false,

transparent: true,

opacity: 1.0

});

const particles = new THREE.Points(geometry, material);

scene.add(particles);

// --- Text Generation ---

function generateTextCoordinates(str) {

const tCanvas = document.createElement('canvas');

tCanvas.width = TEXT_CANVAS_WIDTH;

tCanvas.height = TEXT_CANVAS_HEIGHT;

const tCtx = tCanvas.getContext('2d', {willReadFrequently: true});

tCtx.fillStyle = '#000000';

tCtx.fillRect(0, 0, tCanvas.width, tCanvas.height);

// Auto-fit Logic

let fontSize = 220;

tCtx.font = `bold ${fontSize}px "Arial", sans-serif`;

const measure = tCtx.measureText(str);

if (measure.width > 800) {

const ratio = 800 / measure.width;

fontSize = Math.floor(fontSize * ratio);

tCtx.font = `bold ${fontSize}px "Arial", sans-serif`;

}

tCtx.fillStyle = '#ffffff';

tCtx.textAlign = 'center';

tCtx.textBaseline = 'middle';

tCtx.fillText(str, tCanvas.width/2, tCanvas.height/2);

const imageData = tCtx.getImageData(0, 0, tCanvas.width, tCanvas.height);

const data = imageData.data;

const coords = [];

// Scan

for(let y=0; y<tCanvas.height; y+=TEXT_SAMPLE_STEP) {

for(let x=0; x<tCanvas.width; x+=TEXT_SAMPLE_STEP) {

const alpha = data[(y*tCanvas.width + x)*4]; // R channel check

if(alpha > 128) {

coords.push({

x: (x - tCanvas.width/2) * 1.6, // Scale up

y: -(y - tCanvas.height/2) * 1.6,

z: 0

});

}

return coords;

}

let textCoords = generateTextCoordinates("Hello");

// --- MediaPipe Setup ---

async function setupMediaPipe() {

try {

console.log("Starting MediaPipe setup...");

const vision = await FilesetResolver.forVisionTasks(

"https://cdn.jsdelivr.net/npm/@mediapipe/[email protected]/wasm"

);

handLandmarker = await HandLandmarker.createFromOptions(vision, {

baseOptions: {

modelAssetPath: `https://storage.googleapis.com/mediapipe-models/hand_landmarker/hand_landmarker/float16/1/hand_landmarker.task`,

delegate: "GPU"

runningMode: "VIDEO",

numHands: 2

});

console.log("HandLandmarker created.");

// Start webcam

if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {

navigator.mediaDevices.getUserMedia({ video: { width: 1280, height: 720 } })

.then((stream) => {

video.srcObject = stream;

console.log("Camera stream started.");

})

.catch((err) => {

console.error("Camera access error:", err);

alert("無法開啟攝影機: " + err.message + "\n請確認是否允許權限，或是否使用 HTTPS/localhost。");

});

} else {

console.error("navigator.mediaDevices is undefined. Secure context might be required.");

alert("瀏覽器不支援此環境開啟攝影機。\n請嘗試使用 localhost 或 HTTPS 連線。\n(http://webgl.test 可能被視為不安全)");

}

} catch (e) {

console.error("MediaPipe Init Error:", e);

alert("MediaPipe 初始化失敗: " + e.message);

}

setupMediaPipe();

// --- Logic Loop ---

function updateLogic() {

// Check Camera

if (video.currentTime !== lastVideoTime && handLandmarker && video.videoWidth > 0 && video.videoHeight > 0) {

let startTimeMs = performance.now();

const detections = handLandmarker.detectForVideo(video, startTimeMs);

lastVideoTime = video.currentTime;

processHands(detections);

}

// State Machine for Particles

assignParticleTargets();

}

function countFingers(landmarks) {

// Simple logic: y of tip < y of pip (screen coordinates, y is down? No in MP y is normalized 0-1 down)

// MP: 0=wrist, 4=thumb_tip, 8=index_tip, 12=middle_tip, 16=ring_tip, 20=pinky_tip

// PIPs: 3, 6, 10, 14, 18

// Note: Thumb is tricky, use x distance for thumb? simplified: tip vs mcp

let count = 0;

const tips = [8, 12, 16, 20];

const pips = [6, 10, 14, 18]; // Using PIP or MCP

// Non-thumb fingers

for(let i=0; i<4; i++) {

if(landmarks[tips[i]].y < landmarks[pips[i]].y) count++;

}

// Thumb (based on x relative to wrist for simplicity, or tip vs mcp)

// Assuming right hand rules might differ, for now generic check

// A simple robust check: dist(tip, wrist) > dist(IP, wrist)

// Let's use simpler y check or x check depending on hand side?

// Fallback: mostly vertical hand assumed.

if(landmarks[4].y < landmarks[3].y) count++;

return count;

}

function processHands(results) {

lhDetected = false;

rhDetected = false;

if (results.landmarks) {

for (let i = 0; i < results.landmarks.length; i++) {

const landmarks = results.landmarks[i];

const handedness = results.handednesses[i][0].categoryName;

if (handedness === "Left") {

lhDetected = true;

lhFingers = countFingers(landmarks);

const palm = landmarks[0];

leftHandPalmPos.set(

(1.0 - palm.x - 0.5) * width * 1.5,

-(palm.y - 0.5) * height * 1.5,

);

document.getElementById('lh-status').innerText = "ACTIVE";

document.getElementById('lh-status').style.color = '#0f0';

document.getElementById('lh-gesture').innerText = `Fingers: ${lhFingers}`;

} else if (handedness === "Right") {

rhDetected = true;

rhFingers = countFingers(landmarks);

document.getElementById('rh-status').innerText = "ACTIVE";

document.getElementById('rh-status').style.color = '#0f0';

document.getElementById('rh-action').innerText = `Fingers: ${rhFingers}`;

}

if(!lhDetected) {

document.getElementById('lh-status').innerText = "searching...";

document.getElementById('lh-status').style.color = '#555';

lhFingers = 0;

}

if(!rhDetected) {

document.getElementById('rh-status').innerText = "searching...";

document.getElementById('rh-status').style.color = '#555';

rhFingers = 0;

}

// Decide Global Mode

// Priority: Dual Combo > Left Hand > Right Hand > Idle

if (lhDetected && rhDetected && lhFingers === 5 && rhFingers === 5) {

isDualCombo = true;

currentTargetShape = 'text';

currentText = themeText;

targetColor = COLOR_ORANGE;

document.getElementById('mode-display').innerText = "THEME";

document.getElementById('mode-display').style.color = "#FF8800";

} else {

isDualCombo = false;

if (lhFingers > 0 && lhFingers <= 5) {

currentTargetShape = 'text';

currentText = gestureText[lhFingers];

if(lhFingers===5) targetColor = COLOR_ORANGE;

else if(lhFingers===4) targetColor = COLOR_NEON_GREEN;

else if(lhFingers===3) targetColor = COLOR_NEON_PINK;

else if(lhFingers===2) targetColor = COLOR_NEON_YELLOW;

else targetColor = COLOR_NEON_BLUE;

document.getElementById('mode-display').innerText = "LH TEXT";

document.getElementById('mode-display').style.color = "#00ff88";

} else if (rhFingers > 0 && rhFingers <= 5) {

currentTargetShape = 'text';

currentText = gestureText[5 + rhFingers]; // Map 6-10

if(rhFingers===5) targetColor = COLOR_ORANGE;

else if(rhFingers===4) targetColor = COLOR_NEON_GREEN;

else if(rhFingers===3) targetColor = COLOR_NEON_PINK;

else if(rhFingers===2) targetColor = COLOR_NEON_YELLOW;

else targetColor = COLOR_NEON_BLUE;

document.getElementById('mode-display').innerText = "RH TEXT";

document.getElementById('mode-display').style.color = "#0088ff";

} else {

currentTargetShape = 'idle';

document.getElementById('mode-display').innerText = "IDLE";

document.getElementById('mode-display').style.color = "#555";

}

function assignParticleTargets() {

// Re-generate text points if needed (optimization: cache these)

// For now, simpler caching check

if (currentTargetShape === 'text') {

// If text changed, regen

// But we store currentText.

// We'll regenerate every frame or check dirty flag?

// Let's just regen for simplicity or memoize if slow.

// Optimization: Just do it once when `currentText` changes.

}

// --- Pre-calculate Text ---

const textCache = {};

const phrases = ["First", "Second", "Third", "Fourth", "Bye", themeText];

// Generate immediately

phrases.forEach(str => {

textCache[str] = generateTextCoordinates(str);

});

// --- Animation Loop ---

function animate() {

requestAnimationFrame(animate);

// FPS

frameCount++;

const now = performance.now();

if (now - lastTime >= 1000) {

document.getElementById('fps-display').innerText = frameCount;

frameCount = 0;

lastTime = now;

}

updateLogic();

// --- Dynamic Style Update ---

const isHandActive = lhDetected || rhDetected;

const targetSize = isHandActive ? TARGET_SIZE_ACTIVE : TARGET_SIZE_IDLE;

const targetOpacity = isHandActive ? TARGET_OPACITY_ACTIVE : TARGET_OPACITY_IDLE;

// Lerp

currentSize += (targetSize - currentSize) * 0.1;

currentOpacity += (targetOpacity - currentOpacity) * 0.1;

material.size = currentSize;

material.opacity = currentOpacity;

const posAttr = geometry.attributes.position;

const colAttr = geometry.attributes.color;

const time = Date.now() * 0.001;

let targetPoints = [];

if (currentTargetShape === 'text') {

// Use cached

targetPoints = textCache[currentText] || [];

}

for (let i = 0; i < PARTICLE_COUNT; i++) {

let px = posAttr.getX(i);

let py = posAttr.getY(i);

let pz = posAttr.getZ(i);

let tx, ty, tz;

let r, g, b;

// --- 1. Determine Target ---

if (currentTargetShape === 'text') {

if (targetPoints.length > 0) {

const pIndex = i % targetPoints.length;

const tp = targetPoints[pIndex];

tx = tp.x;

ty = tp.y;

tz = tp.z;

tx += Math.sin(time + ieee_random(i)*10) * 0.6; // Jitter

} else {

// Fallback

tx = px; ty = py; tz = pz;

}

r = targetColor.r; g = targetColor.g; b = targetColor.b;

} else if (currentTargetShape === 'nebula') {

const data = particlesData[i];

tx = Math.sin(time * 0.2 + data.phase) * width * 0.5;

ty = Math.cos(time * 0.1 + data.phase) * height * 0.5;

tz = Math.sin(time * 0.3 + px*0.01) * 200;

// Ripple Effect (Sine wave around Right Hand)

// If Right hand is detected & Open

if (rhDetected && rhOpen) {

const dx = tx - scatterPos.x;

const dy = ty - scatterPos.y;

const dist = Math.sqrt(dx*dx + dy*dy);

// Ripple formula: Z offset based on sin(dist - time)

// Only affect if close-ish or global? User said "Hand swipe produces Ripple"

// Let's make it global but centralized on hand

if (dist < 600) {

const ripple = Math.sin(dist * 0.05 - time * 10) * 50 * Math.exp(-dist * 0.005);

tz += ripple;

}

r = 0.2; g = 0.6; b = 1.0;

} else if (currentTargetShape === 'sphere') {

const offset = 2 / PARTICLE_COUNT;

const inc = Math.PI * (3 - Math.sqrt(5));

const y = ((i * offset) - 1) + (offset / 2);

const rDist = Math.sqrt(1 - Math.pow(y, 2));

const phi = ((i + 1) % PARTICLE_COUNT) * inc;

const radius = 200;

// Rotating

const rotSpeed = time * 3;

let sx = Math.cos(phi + rotSpeed) * rDist;

let sz = Math.sin(phi + rotSpeed) * rDist;

let sy = y;

tx = leftHandPalmPos.x + sx * radius;

ty = leftHandPalmPos.y + sy * radius;

tz = leftHandPalmPos.z + sz * radius;

// Jumping Effect check? "Bouncing trajectory"

// Done via simple lerp for now, maybe add noise to path?

// To strictly follow "Jumping trajectory", we'd need bezier.

// But lerp 0.16 is fast. Let's add some vertical noise if far.

r = 1.0; g = 0.6; b = 0.0; // Orange

if (i % 30 === 0) { r=0.1; g=0.1; b=0.1; } // Texture lines

} else if (currentTargetShape === 'idle') {

// Random float

const data = particlesData[i];

tx = Math.sin(time * 0.1 + data.phase) * width * 0.6;

ty = Math.cos(time * 0.15 + data.phase) * height * 0.6;

tz = Math.sin(time * 0.1 + i*0.01) * 200;

r=0.2; g=0.2; b=0.2;

}

// --- 2. Physics Update (Lerp) ---

px += (tx - px) * LERP_FACTOR;

py += (ty - py) * LERP_FACTOR;

pz += (tz - pz) * LERP_FACTOR;

// --- 3. Scatter Interaction (Right Hand - Closed) ---

if (!isDualCombo && rhDetected && !rhOpen) {

const dx = px - scatterPos.x;

const dy = py - scatterPos.y;

const dist = Math.sqrt(dx*dx + dy*dy);

if (dist < 200) {

const angle = Math.atan2(dy, dx);

const force = (200 - dist) * 0.8; // Stronger push

px += Math.cos(angle) * force;

py += Math.sin(angle) * force;

}

posAttr.setXYZ(i, px, py, pz);

colAttr.setXYZ(i, r, g, b);

}

posAttr.needsUpdate = true;

colAttr.needsUpdate = true;

renderer.render(scene, camera);

}

// Helper

function ieee_random(n) { return Math.sin(n) * 10000 - Math.floor(Math.sin(n) * 10000); }

// Start

animate();

// Handle Resize

window.addEventListener('resize', () => {

width = window.innerWidth;

height = window.innerHeight;

camera.aspect = width / height;

camera.updateProjectionMatrix();

renderer.setSize(width, height);

});

</script>

</body>

</html>

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