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我們來學習material的side屬性；
就讓顯示讓渲染器渲染正面/雙面/背面。默認是正面
<html>
<head>
<title>material-side</title>
<style>
body { margin: 0; }
canvas { width: 100%; height: 100% }
</style>
</head>
<body>
<!-- 寫自己的路徑 -->
<script src="../../../build/three.js"></script>
<script>
var scene = new THREE.Scene();
scene.background=new THREE.Color(0xcfcfcf)
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth/window.innerHeight, 0.1, 1000 );
var renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
var geometry = new THREE.BoxGeometry( 1, 1, 1 );
var material_1 = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );//默認正面
var material_2 = new THREE.MeshBasicMaterial( { color: 0xfdfdfd ,side:2} );//雙面
var material_3 = new THREE.MeshBasicMaterial( { color: 0xccffff ,side:3} );//背面
var cube = new THREE.Mesh( geometry, material_1 );
cube.position.set(-2,0,0);
var cube02=new THREE.Mesh( geometry, material_2 );
cube02.position.set(0,0,0);
var cube03=new THREE.Mesh( geometry, material_3 );
cube03.position.set(2,0,0);
scene.add( cube,cube02,cube03 );
camera.position.z = 5;
var animate = function () {
requestAnimationFrame( animate );
cube.rotation.x=cube02.rotation.x=cube03.rotation.x += 0.01;
cube.rotation.y=cube02.rotation.y=cube03.rotation.y+= 0.01;
renderer.render( scene, camera );
};
animate();
</script>
</body>
</html>