VisionSimVR/index.html at main · Joeboukhalil/VisionSimVR · 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>Visual Impairment Simulator</title>
  <style>
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html, body { height: 100%; background: black; overflow: hidden; }
    #container { display: flex; height: 100vh; width: 100vw; }
    canvas { object-fit: cover; }
    #leftView, #rightView {
      width: 50vw;
      height: 100vh;
    }
    .single #rightView {
      display: none;
    }
    .single #leftView {
      width: 100vw;
    }
    #controls {
      position: fixed;
      top: 10px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 10;
      background: white;
      padding: 10px;
      border-radius: 8px;
      font-size: 14px;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      justify-content: center;
    }
    select {
      font-size: 14px;
    }
  </style>
</head>
<body>

<div id="controls">
  <select id="filterSelector">
    <option value="normal">Normal</option>
    <option value="cataract">Cataract</option>
    <option value="glaucoma">Glaucoma</option>
    <option value="macular">Macular Degeneration</option>
  </select>
  <select id="cameraSelector">
    <option value="environment">Back Camera</option>
    <option value="user">Front Camera</option>
  </select>
  <select id="viewModeSelector">
    <option value="split">Google Cardboard (Split View)</option>
    <option value="single">Normal View (Single Screen)</option>
  </select>
</div>

<div id="container" class="split">
  <canvas id="leftView"></canvas>
  <canvas id="rightView"></canvas>
</div>

<script>
  const leftCanvas = document.getElementById('leftView');
  const rightCanvas = document.getElementById('rightView');
  const leftCtx = leftCanvas.getContext('2d');
  const rightCtx = rightCanvas.getContext('2d');
  const filterSelector = document.getElementById('filterSelector');
  const cameraSelector = document.getElementById('cameraSelector');
  const viewModeSelector = document.getElementById('viewModeSelector');
  const container = document.getElementById('container');

  let filterType = 'normal';
  let facingMode = 'environment';
  let stream = null;

  const video = document.createElement('video');
  video.autoplay = true;
  video.playsInline = true;

  filterSelector.addEventListener('change', (e) => {
    filterType = e.target.value;
  });

  cameraSelector.addEventListener('change', (e) => {
    facingMode = e.target.value;
    startCamera();
  });

  viewModeSelector.addEventListener('change', (e) => {
    container.className = e.target.value; // 'split' or 'single'
  });

  function startCamera() {
    stopCamera();
    navigator.mediaDevices.getUserMedia({
      video: { facingMode: { exact: facingMode } }
    }).then(s => {
      stream = s;
      video.srcObject = stream;
    }).catch(err => {
      alert("Error accessing camera: " + err.message);
    });
  }

  function stopCamera() {
    if (stream) {
      stream.getTracks().forEach(track => track.stop());
      stream = null;
    }
  }

  function applyFilter(ctx, canvas) {
    if (filterType === 'cataract') {
      ctx.globalAlpha = 0.6;
      ctx.fillStyle = 'rgba(255,255,255,0.3)';
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      ctx.filter = 'blur(5px) contrast(70%)';
    } else if (filterType === 'glaucoma') {
      ctx.save();
      ctx.beginPath();
      ctx.arc(canvas.width / 2, canvas.height / 2, canvas.width / 4, 0, 2 * Math.PI);
      ctx.clip();
      ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
      ctx.restore();
      ctx.fillStyle = 'rgba(0,0,0,0.9)';
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      ctx.globalCompositeOperation = 'destination-in';
      ctx.beginPath();
      ctx.arc(canvas.width / 2, canvas.height / 2, canvas.width / 4, 0, 2 * Math.PI);
      ctx.fill();
      ctx.globalCompositeOperation = 'source-over';
    } else if (filterType === 'macular') {
      ctx.beginPath();
      ctx.fillStyle = 'rgba(0,0,0,0.7)';
      ctx.arc(canvas.width / 2, canvas.height / 2, canvas.width / 6, 0, 2 * Math.PI);
      ctx.fill();
    }

    ctx.filter = 'none';
    ctx.globalAlpha = 1;
  }

  function draw(ctx, canvas) {
    if (video.readyState < 2) return;

    canvas.width = video.videoWidth;
    canvas.height = video.videoHeight;
    ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
    applyFilter(ctx, canvas);
  }

  function loop() {
    draw(leftCtx, leftCanvas);
    if (container.className === 'split') draw(rightCtx, rightCanvas);
    requestAnimationFrame(loop);
  }

  startCamera();
  loop();
</script>

</body>
</html>