Three.js--带阴影的旋转体

Demo演示地址   https://5mfivemeter.github.io/THREE/20191226.html

演示图片

源码   https://github.com/5mFiveMeter/5mFiveMeter.github.io/tree/master/THREE

　　　　　//之前要引入three.js 　　　　
　
　　　　　//场景
        var scene = new THREE.Scene();
        //相机 此处选择透视相机（近大远小）
        /*
        *param 视野角度 我理解为上下眼皮中点和视网膜中心连线的夹角
        *param 长宽比 哦
        *param 距离近截面的距离
        *param 距离远截面的距离
        * 近截面和远截面之间的距离则是被渲染的范围 这里也就是距离相机 0.1-1000 范围
        */
        var camera = new THREE.PerspectiveCamera(60,window.innerWidth/window.innerHeight,0.1,1000);
        //相机位置  也可以直接属性赋值(camera.position.x=30 ...)
        camera.position.set(30,30,30);
        //设置相机的焦点 此时看向圆心
        camera.lookAt(new THREE.Vector3(0,0,0));
        //渲染器采用WebGLRenderer
        var renderer = new THREE.WebGLRenderer();
        //渲染器尺寸
        renderer.setSize(window.innerWidth,window.innerHeight);
        //渲染器加入到body中
        document.body.appendChild(renderer.domElement);
        //设置渲染器颜色
        renderer.setClearColor(new THREE.Color(0xe2e2e2));
        //开启阴影
        renderer.shadowMap.enabled = true;
        //承载台
        //一个长15宽20的面
        var paneGeometry = new THREE.PlaneGeometry(15,20);
        //表面不光泽的漫反射材质
        var planeMaterial = new THREE.MeshLambertMaterial({color:0xcccccc});
        //产生物体
        var plane = new THREE.Mesh(paneGeometry,planeMaterial);
        //设置位置
        plane.position.set(0,0,0);
        plane.rotation.x = -0.5*Math.PI;
        //能接受阴影投射
        plane.receiveShadow=true;
        //添加到场景
        scene.add(plane);
        //坐标轴
        var axes = new THREE.AxesHelper(20);
        scene.add(axes);
        //光源
        var spotLight = new THREE.SpotLight(0xffffff);
        spotLight.position.set(-40,60,-10);
        spotLight.castShadow = true;
        scene.add(spotLight);
        //盒子
        var geometry = new THREE.BoxGeometry(4,4,4);
        var material = new THREE.MeshLambertMaterial({color:0x00ff00});
        var cube = new THREE.Mesh(geometry,material);
        cube.castShadow = true;
        cube.position.set(0,4,0);
        scene.add(cube);
        render();

        function render(){
            requestAnimationFrame(render);
            cube.rotation.x += 0.1;
            cube.rotation.y += 0.1;
            renderer.render(scene,camera);
        }