三.js 脚本不起作用

Question

I'm reading a book "Learning Three.js - The JavaScript 3D Library for WebGL - 2nd Edition" and first example in book which is not working at all.我正在阅读一本书“Learning Three.js - The JavaScript 3D Library for WebGL - 2nd Edition”和书中第一个根本不起作用的例子。

Can someone please give me a direction why?有人可以给我一个方向吗？ I'd tried with "How can I enable WebGL in my browser?"我试过“如何在浏览器中启用 WebGL？” and it didn't help.它没有帮助。 But examples on three.js / examples are working as they should.但是three.js / examples 上的示例正在正常工作。

I've extracted three.js and put example bellow in build folder where three.js is located.我已经提取了three.js并将示例波纹管放在了three.js所在的构建文件夹中。

Do I need local web server to test WebGL?我是否需要本地 Web 服务器来测试 WebGL？

Now I try to debug and code in Visual Code.现在我尝试在 Visual Code 中进行调试和编码。 Any other recommendations?还有其他推荐吗？

<html>

<head>
    <title>Example 01.02 - First Scene</title>
    <script type="text/javascript" src="three.js"></script>
    <style>
        body {
            /* set margin to 0 and overflow to hidden, to go fullscreen */
            margin: 0;
            overflow: hidden;
        }
    </style>
</head>
<body>

<!-- Div which will hold the Output -->
<div id="WebGL-output">
</div>

<!-- Javascript code that runs our Three.js examples -->
<script type="text/javascript">

    // once everything is loaded, we run our Three.js stuff.
    function init() {

        // create a scene, that will hold all our elements such as objects, cameras and lights.
        var scene = new THREE.Scene();

        // create a camera, which defines where we're looking at.
        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        // create a render and set the size
        var renderer = new THREE.WebGLRenderer();
        renderer.setClearColorHex();
        renderer.setClearColor(new THREE.Color(0xEEEEEE));
        renderer.setSize(window.innerWidth, window.innerHeight);

        // show axes in the screen
        var axes = new THREE.AxisHelper(20);
        scene.add(axes);

        // create the ground plane
        var planeGeometry = new THREE.PlaneGeometry(60, 20);
        var planeMaterial = new THREE.MeshBasicMaterial({color: 0xcccccc});
        var plane = new THREE.Mesh(planeGeometry, planeMaterial);

        // rotate and position the plane
        plane.rotation.x = -0.5 * Math.PI;
        plane.position.x = 15;
        plane.position.y = 0;
        plane.position.z = 0;

        // add the plane to the scene
        scene.add(plane);

        // create a cube
        var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
        var cubeMaterial = new THREE.MeshBasicMaterial({color: 0xff0000, wireframe: true});
        var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);

        // position the cube
        cube.position.x = -4;
        cube.position.y = 3;
        cube.position.z = 0;

        // add the cube to the scene
        scene.add(cube);

        // create a sphere
        var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
        var sphereMaterial = new THREE.MeshBasicMaterial({color: 0x7777ff, wireframe: true});
        var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);

        // position the sphere
        sphere.position.x = 20;
        sphere.position.y = 4;
        sphere.position.z = 2;

        // add the sphere to the scene
        scene.add(sphere);

        // position and point the camera to the center of the scene
        camera.position.x = -30;
        camera.position.y = 40;
        camera.position.z = 30;
        camera.lookAt(scene.position);

        // add the output of the renderer to the html element
        document.getElementById("WebGL-output").appendChild(renderer.domElement);

        // render the scene
        renderer.render(scene, camera);
    }
    window.onload = init;

</script>
</body>
</html>

Answer 1

the line线

renderer.setClearColorHex() renderer.setClearColorHex()

should be removed.应该被删除。

Here is new code with a jsfiddle (using three.js from the net):这是带有 jsfiddle 的新代码（使用来自网络的three.js）：

<html>

  <head>
    <title>Example 01.02 - First Scene</title>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/three.js/89/three.js"></script>
    <style>
      body {
        /* set margin to 0 and overflow to hidden, to go fullscreen */
        margin: 0;
        overflow: hidden;
      }

    </style>
  </head>

  <body>

    <!-- Div which will hold the Output -->
    <div id="WebGL-output">
    </div>

    <!-- Javascript code that runs our Three.js examples -->
    <script type="text/javascript">
      // once everything is loaded, we run our Three.js stuff.
      function init() {

        // create a scene, that will hold all our elements such as objects, cameras and lights.
        var scene = new THREE.Scene();

        // create a camera, which defines where we're looking at.
        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        // create a render and set the size
        var renderer = new THREE.WebGLRenderer();
        //renderer.setClearColorHex();
        renderer.setClearColor(new THREE.Color(0xEEEEEE));
        renderer.setSize(window.innerWidth, window.innerHeight);

        // show axes in the screen
        var axes = new THREE.AxisHelper(20);
        scene.add(axes);

        // create the ground plane
        var planeGeometry = new THREE.PlaneGeometry(60, 20);
        var planeMaterial = new THREE.MeshBasicMaterial({
          color: 0xcccccc
        });
        var plane = new THREE.Mesh(planeGeometry, planeMaterial);

        // rotate and position the plane
        plane.rotation.x = -0.5 * Math.PI;
        plane.position.x = 15;
        plane.position.y = 0;
        plane.position.z = 0;

        // add the plane to the scene
        scene.add(plane);

        // create a cube
        var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
        var cubeMaterial = new THREE.MeshBasicMaterial({
          color: 0xff0000,
          wireframe: true
        });
        var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);

        // position the cube
        cube.position.x = -4;
        cube.position.y = 3;
        cube.position.z = 0;

        // add the cube to the scene
        scene.add(cube);

        // create a sphere
        var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
        var sphereMaterial = new THREE.MeshBasicMaterial({
          color: 0x7777ff,
          wireframe: true
        });
        var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);

        // position the sphere
        sphere.position.x = 20;
        sphere.position.y = 4;
        sphere.position.z = 2;

        // add the sphere to the scene
        scene.add(sphere);

        // position and point the camera to the center of the scene
        camera.position.x = -30;
        camera.position.y = 40;
        camera.position.z = 30;
        camera.lookAt(scene.position);

        // add the output of the renderer to the html element
        document.getElementById("WebGL-output").appendChild(renderer.domElement);

        // render the scene
        renderer.render(scene, camera);
      }
      window.onload = init;

    </script>
  </body>

</html>

https://jsfiddle.net/90zzka64/ https://jsfiddle.net/90zzka64/

三.js 脚本不起作用

问题描述

1 个解决方案

解决方案1
1 2018-01-08 09:18:39

三.js 脚本不起作用

问题描述

1 个解决方案

解决方案1 1 2018-01-08 09:18:39

解决方案1
1 2018-01-08 09:18:39