threejs——新建场景，添加立方体和球体

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代码效果

源码

<!DOCTYPE html>

<html>

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

<div id="Lapbin-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() {

      
        // 创建一个场景，该场景将包含所有元素，例如对象、摄影机和灯光。
        var scene = new THREE.Scene();

        // 创建一个摄像头，它定义了我们要看的范围。
        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        // 创建渲染并设置大小
        var renderer = new THREE.WebGLRenderer();
        renderer.setClearColor(new THREE.Color(0x000000));
        renderer.setSize(window.innerWidth, window.innerHeight);

        // 在屏幕上显示轴
        var axes = new THREE.AxisHelper(20);
        scene.add(axes);

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

        // 旋转并定位平面
        plane.rotation.x = -0.5 * Math.PI;
        plane.position.x = 15;
        plane.position.y = 0;
        plane.position.z = 0;

        // 将平面添加到场景中
        scene.add(plane);

        // 创建一个立方体
        var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
        var cubeMaterial = new THREE.MeshBasicMaterial({color: 0xff0000, wireframe: true});
        var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);

        // 定位立方体
        cube.position.x = -4;
        cube.position.y = 3;
        cube.position.z = 0;

        // 将立方体添加到场景中
        scene.add(cube);

        // 创建一个球体
        var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
        var sphereMaterial = new THREE.MeshBasicMaterial({color: 0xdd77ff, wireframe: true});
        var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);

        // 定位球体
        sphere.position.x = 20;
        sphere.position.y = 4;
        sphere.position.z = 2;

        // 将球体添加到场景中
        scene.add(sphere);

        // 将摄影机定位并指向场景的中心
        camera.position.x = -30;
        camera.position.y = 40;
        camera.position.z = 30;
        camera.lookAt(scene.position);

        // 将渲染器的输出添加到html元素
        document.getElementById("Lapbin-output").appendChild(renderer.domElement);

        // 渲染场景
        renderer.render(scene, camera);
    }
    window.onload = init;

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

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