09 Three.js使用性能插件stats进行性能监听

admin · 发表于 2021-1-3 10:46:44

stats性能插件添加了以后，会默认在左上角显示性能帧数，每次刷新所用时间，占用内存。鼠标左键点击可进行切换，默认显示每秒的帧数。

首先需要将stats插件引入，地址是官网下载文件里面的examples/js/libs/stats.min.js。
然后需要实例化一个组件，然后添加到dom当中。

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style type="text/css">
html, body {
margin: 0;
height: 100%;
}
canvas {
display: block;
}
</style>
</head>
<body onload="draw();">
</body>
<script src="https://www.wjceo.com/lib/three.js"></script>
<script src="https://www.wjceo.com/lib/js/controls/TrackballControls.js"></script>
<script src="https://www.wjceo.com/lib/js/libs/stats.min.js"></script>
<script>
var renderer;
function initRender() {
renderer = new THREE.WebGLRenderer({antialias:true});
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
}
var camera;
function initCamera() {
camera = new THREE.PerspectiveCamera(45, window.innerWidth/window.innerHeight, 1, 10000);
camera.position.set(0, 0, 400);
}
var scene;
function initScene() {
scene = new THREE.Scene();
}
var light;
function initLight() {
scene.add(new THREE.AmbientLight(0x404040));
light = new THREE.DirectionalLight(0xffffff);
light.position.set(1,1,1);
scene.add(light);
}
function initModel() {
var map = new THREE.TextureLoader().load("/lib/textures/UV_Grid_Sm.jpg");
var material = new THREE.MeshLambertMaterial({map:map});
var cube = new THREE.Mesh(new THREE.BoxGeometry(100, 200, 100, 1, 1, 1), material);
scene.add(cube);
}
//初始化性能插件
var stats;
function initStats() {
stats = new Stats();
document.body.appendChild(stats.dom);
}
//用户交互插件鼠标左键按住旋转，右键按住平移，滚轮缩放
var controls;
function initControls() {
controls = new THREE.TrackballControls( camera );
//旋转速度
controls.rotateSpeed = 5;
//变焦速度
controls.zoomSpeed = 3;
//平移速度
controls.panSpeed = 0.8;
//是否不变焦
controls.noZoom = false;
//是否不平移
controls.noPan = false;
//是否开启移动惯性
controls.staticMoving = false;
//动态阻尼系数就是灵敏度
controls.dynamicDampingFactor = 0.3;
//未知，占时先保留
//controls.keys = [ 65, 83, 68 ];
controls.addEventListener( 'change', render );
}
function render() {
renderer.render( scene, camera );
}
//窗口变动触发的函数
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
controls.handleResize();
render();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function animate() {
//更新控制器
controls.update();
render();
//更新性能插件
stats.update();
requestAnimationFrame(animate);
}
function draw() {
initRender();
initScene();
initCamera();
initLight();
initModel();
initControls();
initStats();
animate();
window.onresize = onWindowResize;
}
</script>
</html>

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09 Three.js使用性能插件stats进行性能监听

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