javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157
							<!-- Licensed under a BSD license. See license.html for license -->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
    <title>Three.js - WebXR - Basic - VR Optional</title>
    <style>
    html, body {
        height: 100%;
        margin: 0;
    }
    #c {
        width: 100%;
        height: 100%;
        display: block;
    }
    .mode {
      position: absolute;
      right: 1em;
      top: 1em;
    }
    </style>
  </head>
  <body>
    <canvas id="c"></canvas>
    <div class="mode">
      <a href="?allowvr=true" id="vr">Allow VR</a>
      <a href="?" id="nonvr">Use Non-VR Mode</a>
    </div>
  </body>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>

<script type="importmap">
{
  "imports": {
    "three": "../../build/three.module.js",
    "three/addons/": "../../examples/jsm/"
  }
}
</script>

<script type="module">
import * as THREE from 'three';
import {VRButton} from 'three/addons/webxr/VRButton.js';
import {OrbitControls} from 'three/addons/controls/OrbitControls.js';

function main() {
  const canvas = document.querySelector('#c');
  const renderer = new THREE.WebGLRenderer({canvas});

  const fov = 75;
  const aspect = 2;  // the canvas default
  const near = 0.1;
  const far = 5;
  const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
  camera.position.set(0, 1.6, 0);

  const params = (new URL(document.location)).searchParams;
  const allowvr = params.get('allowvr') === 'true';
  if (allowvr) {
    renderer.xr.enabled = true;
    document.body.appendChild(VRButton.createButton(renderer));
    document.querySelector('#vr').style.display = 'none';
  } else {
    // no VR, add some controls
    const controls = new OrbitControls(camera, canvas);
    controls.target.set(0, 1.6, -2);
    controls.update();
    document.querySelector('#nonvr').style.display = 'none';
  }

  const scene = new THREE.Scene();
  {
    const loader = new THREE.CubeTextureLoader();
    const texture = loader.load([
      'resources/images/grid-1024.png',
      'resources/images/grid-1024.png',
      'resources/images/grid-1024.png',
      'resources/images/grid-1024.png',
      'resources/images/grid-1024.png',
      'resources/images/grid-1024.png',
    ]);
    scene.background = texture;
  }

  {
    const color = 0xFFFFFF;
    const intensity = 1;
    const light = new THREE.DirectionalLight(color, intensity);
    light.position.set(-1, 2, 4);
    scene.add(light);
  }

  const boxWidth = 1;
  const boxHeight = 1;
  const boxDepth = 1;
  const geometry = new THREE.BoxGeometry(boxWidth, boxHeight, boxDepth);

  function makeInstance(geometry, color, x) {
    const material = new THREE.MeshPhongMaterial({color});

    const cube = new THREE.Mesh(geometry, material);
    scene.add(cube);

    cube.position.x = x;
    cube.position.y = 1.6;
    cube.position.z = -2;

    return cube;
  }

  const cubes = [
    makeInstance(geometry, 0x44aa88,  0),
    makeInstance(geometry, 0x8844aa, -2),
    makeInstance(geometry, 0xaa8844,  2),
  ];

  function resizeRendererToDisplaySize(renderer) {
    const canvas = renderer.domElement;
    const width = canvas.clientWidth;
    const height = canvas.clientHeight;
    const needResize = canvas.width !== width || canvas.height !== height;
    if (needResize) {
      renderer.setSize(width, height, false);
    }
    return needResize;
  }

  function render(time) {
    time *= 0.001;

    if (resizeRendererToDisplaySize(renderer)) {
      const canvas = renderer.domElement;
      camera.aspect = canvas.clientWidth / canvas.clientHeight;
      camera.updateProjectionMatrix();
    }

    cubes.forEach((cube, ndx) => {
      const speed = 1 + ndx * .1;
      const rot = time * speed;
      cube.rotation.x = rot;
      cube.rotation.y = rot;
    });

    renderer.render(scene, camera);
  }

  renderer.setAnimationLoop(render);
}

main();
</script>
</html>