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三大组件
scence 物体的容器
camera 取景拍摄
renderer 显示

var scene = new THREE.Scene(); //场景var camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000); //相机var renderer = new THREE.WebGLRenderer();//渲染器renderer.setSize(window.innerWidth, window.innerHeight);document.body.appendChild(renderer.domElement);var geometry = new THREE.CubeGeometry(2,1,1);var material = new THREE.MeshBasicMaterial({color: 0xaabbff});var cube = new THREE.Mesh(geometry, material); scene.add(cube);camera.position.z = 5;function render() {    requestAnimationFrame(render);//实时渲染    cube.rotation.x += 0.1;    cube.rotation.y += 0.1;    renderer.render(scene, camera);}render();

from
http://www.hewebgl.com/article/getarticle/50