THREE.JS第一个场景
<!DOCTYPE html><html> ???<head> ???????<meta charset="UTF-8"> ???????<title></title> ???????<script src="https://cdn.bootcss.com/three.js/r67/three.js"></script> ???????<script src="https://cdn.bootcss.com/stats.js/r10/Stats.min.js"></script> ???????<style> ???????????body{ ???????????????margin:0; ???????????????overflow:hidden; ???????????} ???????</style> ???</head> ???<body> ???????<!-- ???????????作者： ???????????时间：2018-10-29 ???????????描述：状态 ???????--> ???????<div id="Stats-output"></div> ???????<!-- ???????????作者： ???????????时间：2018-10-29 ???????????描述：显示动画效果 ???????--> ???????<div id="WebGL-output"></div> ???????<script> ???????????function init(){ ????????????????????????????????var stats = initStats(); ???????????????????????????????//创建一个场景 ???????????????var scene = new THREE.Scene(); ???????????????????????????????//创建一个相机 ????????????????var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000); ????????????????????????????????//创建一个渲染器 ???????????????var renderer = new THREE.WebGLRenderer(); ???????????????????????????????//渲染器的背景颜色#EEEEEE ???????????????renderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0)); ???????????????????????????????//渲染器的大小 ???????????????renderer.setSize(window.innerWidth, window.innerHeight); ???????????????????????????????//是否显示阴影 ???????????????renderer.shadowMapEnabled = true; ???????????????????????????????????????????????//创建一个地面几何 ???宽60 ??高20 ??宽分成1份 ??高分成1份 ???????????????var planeGeometry = new THREE.PlaneGeometry(60, 20, 1, 1); ???????????????????????????????//地面的材料是光照材料 颜色是#FFFFFF ???????????????var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff}); ???????????????????????????????//合成材料和几何 ???????????????var plane = new THREE.Mesh(planeGeometry, planeMaterial); ???????????????????????????????//地面允许接收阴影 ???????????????plane.receiveShadow = true; ???????????????????????????????//地面坐标 ???????????????plane.rotation.x = -0.5 * Math.PI; ??//地面本来是竖着的 ?要逆时针旋转90度 ??-90 * Math.PI / 180; ?????????????????plane.position.x = 15; ???????????????plane.position.y = 0; ???????????????plane.position.z = 0; ???????????????????????????????// 在场景中添加地面 ???????????????scene.add(plane); ???????????????????????????????// 创建一个正方体 ?使用基本材料 ?允许正方体有阴影 ???????????????var cubeGeometry = new THREE.BoxGeometry(4, 4, 4); ?????????????????var cubeMaterial = new THREE.MeshLambertMaterial({color: 0xff0000}); ???????????????var cube = new THREE.Mesh(cubeGeometry, cubeMaterial); ???????????????cube.castShadow = true; ???????????????????????// 正方体的坐标 ???????????????cube.position.x = -4; ???????????????cube.position.y = 3; ???????????????cube.position.z = 0; ???????????????????????????????// 把正方体添加到场景中 ???????????????scene.add(cube); ???????????????????????????????//球体 ?基本材料 ??????????????????var sphereGeometry = new THREE.SphereGeometry(4, 20, 20); ???????????????var sphereMaterial = new THREE.MeshLambertMaterial({color: 0x7777ff}); ???????????????var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial); ???????????????????????// 球体坐标 ?允许有阴影 ???????????????sphere.position.x = 20; ???????????????sphere.position.y = 0; ???????????????sphere.position.z = 2; ???????????????sphere.castShadow = true; ???????????????????????// 把球体添加到场景中去 ???????????????scene.add(sphere); ???????????????????????????????// 相机的坐标 ?相机的镜头朝向场景 ???????????????camera.position.x = -30; ???????????????camera.position.y = 40; ???????????????camera.position.z = 30; ???????????????camera.lookAt(scene.position); ????????????????????????????????// 添加自然光 ???自然光不会产生阴影 ???????????????var ambientLight = new THREE.AmbientLight(0x0c0c0c); ???????????????scene.add(ambientLight); ???????????????????????// 添加点光源 ?点光源会产生阴影 ???????????????var spotLight = new THREE.SpotLight(0xffffff); ???????????????spotLight.position.set(-40, 60, -10); ???????????????spotLight.castShadow = true; ??//允许点光源产生阴影 ???????????????scene.add(spotLight); ???????????????????????????????//将渲染的场景添加到dom元素中去 ??????????????????document.getElementById("WebGL-output").appendChild(renderer.domElement); ??????????????????????????????????????// 调用渲染场景的循环 ???????????????var step = 0; ???????????????renderScene(); ???????????????????????function renderScene() { ???????????????????????????????????????//更新FPS值 ???????????????????stats.update(); ???????????????????// 旋转正方体 ???????????????????cube.rotation.x += 0.02; ???????????????????cube.rotation.y += 0.02; ???????????????????cube.rotation.z += 0.02; ???????????????????????????// 移动球体 ???????????????????step += 0.04; ???????????????????sphere.position.x = 20 + ( 10 * (Math.cos(step))); ???????????????????sphere.position.y = 2 + ( 10 * Math.abs(Math.sin(step))); ???????????????????????????// render using requestAnimationFrame ???????????????????requestAnimationFrame(renderScene); ???????????????????renderer.render(scene, camera); ???????????????} ???????????????????????????????//在一个小图里显示每秒显示的帧数(FPS) ???????????????function initStats(){ ???????????????????var stats = new Stats(); ???????????????????stats.setMode(0); // 0: fps, 1: ms ???????????????????stats.domElement.style.position = ‘absolute‘; ???????????????????stats.domElement.style.left = ‘0px‘; ???????????????????stats.domElement.style.top = ‘0px‘; ???????????????????document.getElementById("Stats-output").appendChild(stats.domElement); ???????????????????return stats; ???????????????} ???????????} ???????????window.onload = init; ???????</script> ???</body></html>01-THREE.JS第一个场景
原文地址：https://www.cnblogs.com/shuaihan/p/9872415.html