loong17.github.io/render.html at main · VestronVoyager/loong17.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Floating Point Precision Errors - Shape Selector</title>
  <style>
    body { margin: 0; overflow: hidden; }
    #ui {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(255,255,255,0.8);
      padding: 10px;
      border-radius: 5px;
      font-family: sans-serif;
      z-index: 10;
    }
    input, select { margin-right: 5px; }
    button { padding: 4px 8px; }
  </style>
</head>
<body>
  <!-- UI panel with shape selector and coordinate inputs -->
  <div id="ui">
    <label for="shapeSelector">Shape:</label>
    <select id="shapeSelector">
      <option value="sphere">Sphere</option>
      <option value="pyramid">Pyramid</option>
      <option value="cube">Cube</option>
      <option value="torusKnot">Torus Knot</option>
    </select>
    <br>
    <input type="text" id="x" placeholder="x" value="0">
    <input type="text" id="y" placeholder="y" value="0">
    <input type="text" id="z" placeholder="z" value="0">
    <button id="teleport">Teleport</button>
  </div>

  <!-- Include Three.js -->
  <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
  <script>
    // Set up the scene, camera, and renderer.
    const scene = new THREE.Scene();
    const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1e8);
    const renderer = new THREE.WebGLRenderer({ antialias: true });
    renderer.setSize(window.innerWidth, window.innerHeight);
    document.body.appendChild(renderer.domElement);

    // Global variable to hold the current mesh.
    let currentMesh = null;

    // Create a mesh based on the selected shape.
    function createMesh(shape) {
      let geometry;
      switch (shape) {
        case "sphere":
          geometry = new THREE.SphereGeometry(2, 128, 128);
          break;
        case "pyramid":
          // A square pyramid using ConeGeometry with 4 radial segments.
          geometry = new THREE.ConeGeometry(2, 3, 4);
          break;
        case "cube":
          geometry = new THREE.BoxGeometry(2, 2, 2);
          break;
        case "torusKnot":
          // A high resolution torus knot.
          geometry = new THREE.TorusKnotGeometry(2, 0.5, 300, 20);
          break;
        default:
          geometry = new THREE.SphereGeometry(2, 128, 128);
      }
      return new THREE.Mesh(geometry, new THREE.MeshNormalMaterial());
    }

    // Update the mesh in the scene.
    function updateMesh(shape) {
      if (currentMesh) {
        scene.remove(currentMesh);
      }
      currentMesh = createMesh(shape);
      scene.add(currentMesh);
    }

    // Initialize with the default shape from the selector.
    const shapeSelector = document.getElementById("shapeSelector");
    updateMesh(shapeSelector.value);

    // Listen for shape selection changes.
    shapeSelector.addEventListener("change", function() {
      updateMesh(this.value);
    });

    // Add an axes helper for reference.
    const axesHelper = new THREE.AxesHelper(5);
    scene.add(axesHelper);

    // Parameters for an orbiting camera.
    let angle = 0;
    const orbitRadius = 10;

    // Animation loop: the camera orbits around the current mesh.
    function animate() {
      requestAnimationFrame(animate);
      angle += 0.005;
      if (currentMesh) {
        camera.position.x = currentMesh.position.x + orbitRadius * Math.cos(angle);
        camera.position.z = currentMesh.position.z + orbitRadius * Math.sin(angle);
        camera.position.y = currentMesh.position.y + 5; // Elevated view.
        camera.lookAt(currentMesh.position);
      }
      renderer.render(scene, camera);
    }
    animate();

    // Teleport the current mesh to the entered coordinates.
    document.getElementById("teleport").addEventListener("click", () => {
      const x = parseFloat(document.getElementById("x").value) || 0;
      const y = parseFloat(document.getElementById("y").value) || 0;
      const z = parseFloat(document.getElementById("z").value) || 0;
      if (currentMesh) {
        currentMesh.position.set(x, y, z);
        console.log(`Teleported mesh to: (${x}, ${y}, ${z})`);
      }
    });

    // Update camera and renderer on window resize.
    window.addEventListener("resize", () => {
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
    });
  </script>
</body>
</html>