JavaScript-Sandpit/big_cube_mouse_movement.html at main · johnstack/JavaScript-Sandpit · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>3D Cursor Cube</title>
  <style>
    body {
      margin: 0;
      overflow: hidden;
      cursor: none; /* Hide default cursor */
    }
    canvas {
      display: block;
    }
  </style>
</head>
<body>
  <!-- Three.js via CDN -->
  <script src="https://cdn.jsdelivr.net/npm/three@0.158.0/build/three.min.js"></script>

  <script>
    // Setup scene, camera, renderer
    const scene = new THREE.Scene();
    const camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 0.1, 1000);
    const renderer = new THREE.WebGLRenderer({ alpha: true });
    renderer.setSize(window.innerWidth, window.innerHeight);
    document.body.appendChild(renderer.domElement);

    // Create wireframe cube
    const geometry = new THREE.BoxGeometry(1, 1, 1);
    const edges = new THREE.EdgesGeometry(geometry);
    const material = new THREE.LineBasicMaterial({ color: 0x888888 }); // grey
    const cube = new THREE.LineSegments(edges, material);
    scene.add(cube);

    camera.position.z = 5;

    // Track mouse position
    let mouseX = 0, mouseY = 0;
    document.addEventListener('mousemove', (event) => {
      mouseX = (event.clientX / window.innerWidth) * 2 - 1;
      mouseY = -(event.clientY / window.innerHeight) * 2 + 1;
    });

    // Animate cube
    function animate() {
      requestAnimationFrame(animate);

      // Smooth cube position toward cursor
      const vector = new THREE.Vector3(mouseX, mouseY, 0.5).unproject(camera);
      cube.position.lerp(vector, 0.2);

      // Rotate cube
      cube.rotation.x += 0.01;
      cube.rotation.y += 0.01;

      renderer.render(scene, camera);
    }

    animate();

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