web_projection/projector.html at main · eburke/web_projection · 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>Projector</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html, body {
      width: 100%;
      height: 100%;
      overflow: hidden;
    }
    canvas {
      display: block;
      width: 100%;
      height: 100%;
      background-color: black;
    }
  </style>
</head>
<body>
  <canvas id="projectionCanvas"></canvas>
  <script src="lines_api.js"></script>
  <script src="zigzag_api.js"></script>
  <script src="text_api.js"></script>
  <script src="shapes_api.js"></script>
  <script src="images_api.js"></script>

  <script>
    const canvas = document.getElementById('projectionCanvas');
    let prevEvtData = null;

    function resizeCanvas() {
      canvas.width = window.innerWidth;
      canvas.height = window.innerHeight;
      if (prevEvtData != null) {
        drawEvtData(prevEvtData);
      }
    }

    let debounceTimer;
    window.addEventListener('resize', () => {
      clearTimeout(debounceTimer);
      debounceTimer = setTimeout(resizeCanvas, 100);
    });

    window.addEventListener("message", (event) => {
      prevEvtData = event.data;
      drawEvtData(event.data);
    });

    function drawEvtData(evt_data) {
      if (!evt_data || !evt_data.scene) {
        console.error("Invalid event data or missing scene type:", evt_data);
        return; // Log the error and terminate the function if validation fails
      }

      if (evt_data.scene === "lines") {
        drawLines(evt_data);
      } else if (evt_data.scene === "zigzag") {
        drawZigzags(evt_data);
      } else if (evt_data.scene === "text") {
        drawText(evt_data);
      } else if (evt_data.scene === "shapes") {
        drawShapes(evt_data);
      } else if (evt_data.scene === "images") {
        drawImages(evt_data);
      } else {
        console.error("Unsupported scene type:", evt_data.scene);
      }
    }

    window.onload = resizeCanvas
  </script>
</body>
</html>