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Script

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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, viewport-fit=cover">
<title>Universal Neon Cat's Cradle</title>

<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.9.0/p5.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@mediapipe/hands/hands.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@mediapipe/camera_utils/camera_utils.js"></script>

<style>
html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #020816;
  touch-action: none;
}

canvas {
  display: block;
}

#video {
  position: fixed;
  top: 0;
  left: 0;
  opacity: 0;
  pointer-events: none;
}

#status {
  position: fixed;
  top: 20px;
  left: 20px;
  color: rgba(255,255,255,0.7);
  font-family: Arial;
  letter-spacing: 2px;
  font-size: 12px;
  z-index: 10;
}
</style>
</head>

<body>

<div id="status">Initializing Camera...</div>
<video id="video" autoplay playsinline muted></video>

<script>
let video;
let hands;
let camera;

let handData = [];
let ready = false;

const fingertips = [4,8,12,16,20];

function setup() {
  createCanvas(windowWidth, windowHeight);
  pixelDensity(1);

  video = document.getElementById("video");

  startEverything();
}

async function startEverything() {

  try {

    const stream = await navigator.mediaDevices.getUserMedia({
      video: {
        facingMode: "user",
        width: { ideal: 1280 },
        height: { ideal: 720 }
      },
      audio: false
    });

    video.srcObject = stream;

    await video.play();

    setupHands();

    document.getElementById("status").innerText = "Camera Ready";

  } catch(err) {
    console.error(err);
    document.getElementById("status").innerText = "Camera Permission Failed";
  }
}

function setupHands() {

  hands = new Hands({
    locateFile: file =>
      `https://cdn.jsdelivr.net/npm/@mediapipe/hands/${file}`
  });

  hands.setOptions({
    maxNumHands: 2,
    modelComplexity: 1,
    minDetectionConfidence: 0.65,
    minTrackingConfidence: 0.65
  });

  hands.onResults(results => {

    handData = [];

    if (results.multiHandLandmarks) {

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

        handData.push({
          landmarks: results.multiHandLandmarks[i],
          label: results.multiHandedness[i].label
        });
      }
    }

    ready = true;
  });

  camera = new Camera(video, {
    onFrame: async () => {
      await hands.send({ image: video });
    },
    width: 1280,
    height: 720
  });

  camera.start();
}

function draw() {

  background(2,8,22);

  drawVideo();
  drawCRT();

  if (!ready) return;

  drawLandmarks();
  drawStrings();
}

function drawVideo() {

  push();

  translate(width,0);
  scale(-1,1);

  tint(255,70);

  image(video,0,0,width,height);

  pop();

  fill(0,10,30,110);
  rect(0,0,width,height);
}

function drawLandmarks() {

  for (let hand of handData) {

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

      let lm = hand.landmarks[i];

      let x = width - lm.x * width;
      let y = lm.y * height;

      let c = getColor(i);

      drawingContext.shadowBlur = 25;
      drawingContext.shadowColor = c;

      noStroke();
      fill(c);
      circle(x,y,10);

      fill(255);
      circle(x,y,3);
    }
  }

  drawingContext.shadowBlur = 0;
}

function drawStrings() {

  if (handData.length < 2) return;

  let left = null;
  let right = null;

  for (let h of handData) {
    if (h.label === "Left") left = h;
    if (h.label === "Right") right = h;
  }

  if (!left || !right) return;

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

    let a = left.landmarks[fingertips[i]];
    let b = right.landmarks[fingertips[i]];

    let x1 = width - a.x * width;
    let y1 = a.y * height;

    let x2 = width - b.x * width;
    let y2 = b.y * height;

    let d = dist(x1,y1,x2,y2);

    let thick = map(d,50,700,8,1,true);

    neonCurve(x1,y1,x2,y2,thick,d);
  }
}

function neonCurve(x1,y1,x2,y2,t,distance) {

  const ctx = drawingContext;

  let gradient = ctx.createLinearGradient(x1,y1,x2,y2);

  gradient.addColorStop(0,"#00ffff");
  gradient.addColorStop(0.5,"#ff00ff");
  gradient.addColorStop(1,"#ffff00");

  ctx.strokeStyle = gradient;
  ctx.lineWidth = t;

  ctx.shadowBlur = 30;
  ctx.shadowColor = "#00ffff";

  noFill();

  let mx = (x1+x2)/2;
  let my = (y1+y2)/2;

  let wave = sin(frameCount*0.08 + distance*0.01)*20;

  beginShape();

  curveVertex(x1,y1);
  curveVertex(x1,y1);
  curveVertex(mx,my+wave);
  curveVertex(x2,y2);
  curveVertex(x2,y2);

  endShape();

  ctx.shadowBlur = 0;
}

function drawCRT() {

  stroke(255,8);

  for (let y=0;y<height;y+=4) {
    line(0,y,width,y);
  }
}

function getColor(i) {

  if (i % 3 === 0) return "#00ffff";
  if (i % 3 === 1) return "#ff00ff";
  return "#ffff00";
}

function windowResized() {
  resizeCanvas(windowWidth,windowHeight);
}
</script>

</body>
</html>

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215KB

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621.0ms

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622.0ms

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