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‎index.html

Lines changed: 9 additions & 278 deletions
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>MediaPipe + Three.js Shape Creator</title>
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<style>
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body, html {
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margin: 0;
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padding: 0;
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overflow: hidden;
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background: #000;
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}
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#webcam, #canvas, #three-canvas {
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position: absolute;
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width: 100%;
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height: 100%;
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top: 0;
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left: 0;
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object-fit: cover;
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pointer-events: none;
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transform: scaleX(-1);
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}
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#recycle-bin {
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position: absolute;
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bottom: 60px;
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right: 60px;
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width: 160px;
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height: 160px;
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z-index: 20;
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pointer-events: none;
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}
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#recycle-bin.active {
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filter: drop-shadow(0 0 10px #ff0000);
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transform: scale(1.1);
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transition: transform 0.2s, filter 0.2s;
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}
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#instructions {
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position: absolute;
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top: 5px;
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left: 5px;
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color: white;
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background: rgba(0, 0, 0, 0.5);
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padding: 10px 15px;
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/* border-radius: 10px; */
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font-family: sans-serif;
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font-size: 14px;
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z-index: 30;
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}
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</style>
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<title>MediaPipe / Three.js Shape Creator</title>
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<script defer src="https://cloud.umami.is/script.js" data-website-id="eb59c81c-27cb-4e1d-9e8c-bfbe70c48cd9"></script>
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<link rel="stylesheet" href="styles.css">
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</head>
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<body>
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<video id="webcam" autoplay muted playsinline></video>
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<canvas id="canvas"></canvas>
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<div id="three-canvas"></div>
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<img id="recycle-bin" src="recyclebin.png" alt="Recycle Bin" />
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<div id="instructions">
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Bring hands close and pinch to create a shape<br>
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Move hands apart (while pinching) to make the shape larger<br>
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Hover over a shape and pinch to move it<br>
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> Move hands apart to make the shape larger<br>
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Hover over a shape / pinch to move it<br>
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Move a shape into the recycle bin to delete it
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</div>
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<p id="links-para"><a href="https://x.com/measure_plan" target="_blank">Twitter</a> | <a href="https://www.instagram.com/stereo.drift/" target="_blank">Instagram</a> | <a href="https://github.com/collidingScopes/threejs-handtracking-101" target="_blank">Source Code</a> | <a href="https://buymeacoffee.com/stereodrift" target="_blank">❤️</a></p>
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<script src="https://cdn.jsdelivr.net/npm/@mediapipe/hands/hands.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/@mediapipe/camera_utils/camera_utils.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
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<script>
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let video = document.getElementById('webcam');
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let canvas = document.getElementById('canvas');
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let ctx = canvas.getContext('2d');
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let scene, camera, renderer;
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let shapes = [];
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let currentShape = null;
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let isPinching = false;
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let shapeScale = 1;
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let originalDistance = null;
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let selectedShape = null;
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let shapeCreatedThisPinch = false;
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let lastShapeCreationTime = 0;
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const shapeCreationCooldown = 1000;
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const initThree = () => {
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scene = new THREE.Scene();
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camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
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camera.position.z = 5;
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renderer = new THREE.WebGLRenderer({ alpha: true });
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renderer.setSize(window.innerWidth, window.innerHeight);
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document.getElementById('three-canvas').appendChild(renderer.domElement);
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const light = new THREE.AmbientLight(0xffffff, 1);
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scene.add(light);
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animate();
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};
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const animate = () => {
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requestAnimationFrame(animate);
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shapes.forEach(shape => {
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if (shape !== selectedShape) {
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shape.rotation.x += 0.01;
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shape.rotation.y += 0.01;
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}
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});
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renderer.render(scene, camera);
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};
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const neonColors = [0xFF00FF, 0x00FFFF, 0xFF3300, 0x39FF14, 0xFF0099, 0x00FF00, 0xFF6600, 0xFFFF00];
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let colorIndex = 0;
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const getNextNeonColor = () => {
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const color = neonColors[colorIndex];
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colorIndex = (colorIndex + 1) % neonColors.length;
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return color;
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};
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const createRandomShape = (position) => {
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const geometries = [
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new THREE.BoxGeometry(),
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new THREE.SphereGeometry(0.5, 32, 32),
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new THREE.ConeGeometry(0.5, 1, 32),
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new THREE.CylinderGeometry(0.5, 0.5, 1, 32)
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];
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const geometry = geometries[Math.floor(Math.random() * geometries.length)];
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const color = getNextNeonColor();
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const group = new THREE.Group();
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const material = new THREE.MeshBasicMaterial({ color: color, transparent: true, opacity: 0.5 });
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const fillMesh = new THREE.Mesh(geometry, material);
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const wireframeMaterial = new THREE.MeshBasicMaterial({ color: 0xffffff, wireframe: true });
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const wireframeMesh = new THREE.Mesh(geometry, wireframeMaterial);
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group.add(fillMesh);
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group.add(wireframeMesh);
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group.position.copy(position);
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scene.add(group);
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shapes.push(group);
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return group;
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};
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const get3DCoords = (normX, normY) => {
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const x = (normX - 0.5) * 10;
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const y = (0.5 - normY) * 10;
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return new THREE.Vector3(x, y, 0);
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};
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const isPinch = (landmarks) => {
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const d = (a, b) => Math.hypot(a.x - b.x, a.y - b.y, a.z - b.z);
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return d(landmarks[4], landmarks[8]) < 0.06;
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};
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const areIndexFingersClose = (l, r) => {
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const d = (a, b) => Math.hypot(a.x - b.x, a.y - b.y);
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return d(l[8], r[8]) < 0.12;
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};
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const findNearestShape = (position) => {
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let minDist = Infinity;
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let closest = null;
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shapes.forEach(shape => {
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const dist = shape.position.distanceTo(position);
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if (dist < 1.5 && dist < minDist) {
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minDist = dist;
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closest = shape;
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}
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});
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return closest;
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};
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const isInRecycleBinZone = (position) => {
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const vector = position.clone().project(camera);
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const screenX = ((vector.x + 1) / 2) * window.innerWidth;
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const screenY = ((-vector.y + 1) / 2) * window.innerHeight;
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const binWidth = 160;
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const binHeight = 160;
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const binLeft = window.innerWidth - 60 - binWidth;
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const binTop = window.innerHeight - 60 - binHeight;
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const binRight = binLeft + binWidth;
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const binBottom = binTop + binHeight;
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const adjustedX = window.innerWidth - screenX;
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return adjustedX >= binLeft && adjustedX <= binRight && screenY >= binTop && screenY <= binBottom;
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};
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const hands = new Hands({ locateFile: file => `https://cdn.jsdelivr.net/npm/@mediapipe/hands/${file}` });
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hands.setOptions({ maxNumHands: 2, modelComplexity: 1, minDetectionConfidence: 0.7, minTrackingConfidence: 0.7 });
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hands.onResults(results => {
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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const recycleBin = document.getElementById('recycle-bin');
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for (const landmarks of results.multiHandLandmarks) {
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const drawCircle = (landmark) => {
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ctx.beginPath();
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ctx.arc(landmark.x * canvas.width, landmark.y * canvas.height, 10, 0, 2 * Math.PI);
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ctx.fillStyle = 'rgba(0, 255, 255, 0.7)';
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ctx.fill();
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};
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drawCircle(landmarks[4]); // Thumb tip
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drawCircle(landmarks[8]); // Index tip
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}
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// Existing shape interaction and gesture logic...
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if (results.multiHandLandmarks.length === 2) {
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const [l, r] = results.multiHandLandmarks;
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const leftPinch = isPinch(l);
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const rightPinch = isPinch(r);
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const indexesClose = areIndexFingersClose(l, r);
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if (leftPinch && rightPinch) {
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const left = l[8];
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const right = r[8];
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const centerX = (left.x + right.x) / 2;
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const centerY = (left.y + right.y) / 2;
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const distance = Math.hypot(left.x - right.x, left.y - right.y);
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if (!isPinching) {
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const now = Date.now();
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if (!shapeCreatedThisPinch && indexesClose && now - lastShapeCreationTime > shapeCreationCooldown) {
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currentShape = createRandomShape(get3DCoords(centerX, centerY));
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lastShapeCreationTime = now;
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shapeCreatedThisPinch = true;
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originalDistance = distance;
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}
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} else if (currentShape && originalDistance) {
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shapeScale = distance / originalDistance;
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currentShape.scale.set(shapeScale, shapeScale, shapeScale);
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}
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isPinching = true;
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recycleBin.classList.remove('active');
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return;
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}
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}
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isPinching = false;
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shapeCreatedThisPinch = false;
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originalDistance = null;
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currentShape = null;
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if (results.multiHandLandmarks.length > 0) {
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for (const landmarks of results.multiHandLandmarks) {
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const indexTip = landmarks[8];
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const position = get3DCoords(indexTip.x, indexTip.y);
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if (isPinch(landmarks)) {
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if (!selectedShape) {
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selectedShape = findNearestShape(position);
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}
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if (selectedShape) {
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selectedShape.position.copy(position);
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const inBin = isInRecycleBinZone(selectedShape.position);
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selectedShape.children.forEach(child => {
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if (child.material && child.material.wireframe) {
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child.material.color.set(inBin ? 0xff0000 : 0xffffff);
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}
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});
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if (inBin) {
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recycleBin.classList.add('active');
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} else {
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recycleBin.classList.remove('active');
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}
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}
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} else {
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if (selectedShape && isInRecycleBinZone(selectedShape.position)) {
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scene.remove(selectedShape);
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shapes = shapes.filter(s => s !== selectedShape);
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}
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selectedShape = null;
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recycleBin.classList.remove('active');
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}
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}
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} else {
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if (selectedShape && isInRecycleBinZone(selectedShape.position)) {
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scene.remove(selectedShape);
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shapes = shapes.filter(s => s !== selectedShape);
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}
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selectedShape = null;
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recycleBin.classList.remove('active');
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}
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});
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</body>
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const initCamera = async () => {
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const stream = await navigator.mediaDevices.getUserMedia({ video: { width: 1280, height: 720 } });
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video.srcObject = stream;
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await new Promise(resolve => video.onloadedmetadata = resolve);
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canvas.width = video.videoWidth;
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canvas.height = video.videoHeight;
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new Camera(video, {
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onFrame: async () => await hands.send({ image: video }),
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width: video.videoWidth,
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height: video.videoHeight
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}).start();
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};
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<script src="main.js"></script>
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initThree();
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initCamera();
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</script>
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</body>
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</html>

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