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>
原文地址：https://www.cnblogs.com/shuaihan/p/9872415.html
时间： 2024-08-29 22:34:07