第一个3D场景

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="lib/three.js"></script>
    <script src="lib/OrbitControls.js"></script>
</head>

<body>
    <script>
        var scene = new THREE.Scene(); //场景
        var geometry = new THREE.BoxGeometry(90, 90, 90);//穿件一个几何体
        var material = new THREE.MeshLambertMaterial({//材质
            color: 0xffff00
        })
        var mesh = new THREE.Mesh(geometry, material)//模型
        scene.add(mesh)

        var point = new THREE.PointLight(0xffffff);
        point.position.set(100, 100, 100);
        scene.add(point);

        var ambient = new THREE.AmbientLight(0x66666);
        scene.add(ambient);

        //helper
        var helper = new THREE.AxesHelper(200);
        scene.add(helper);

        var width = window.innerWidth;
        var height = window.innerHeight;

        var camera = new THREE.PerspectiveCamera(75, width / height, 0.1, 1000);
        camera.position.set(50, 100, 300);
        camera.lookAt(new THREE.Vector3(0, 0, 0))

        var renderer = new THREE.WebGLRenderer();
        renderer.setClearColor(0x0000ff)
        renderer.setSize(width, height)
        document.body.appendChild(renderer.domElement);

        renderer.render(scene, camera);
    </script>
</body>

</html>
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