效果图
安装
npm install three
帧率统计工具
// 监听动画帧率
var Stats = function () {
var mode = 0;
var container = document.createElement( 'div' );
container.style.cssText = 'position:fixed;top:0;left:0;cursor:pointer;opacity:0.9;z-index:10000';
container.addEventListener( 'click', function ( event ) {
event.preventDefault();
showPanel( ++ mode % container.children.length );
}, false );
//
function addPanel( panel ) {
container.appendChild( panel.dom );
return panel;
}
function showPanel( id ) {
for ( var i = 0; i < container.children.length; i ++ ) {
container.children[ i ].style.display = i === id ? 'block' : 'none';
}
mode = id;
}
//
var beginTime = ( performance || Date ).now(), prevTime = beginTime, frames = 0;
var fpsPanel = addPanel( new Stats.Panel( 'FPS', '#0ff', '#002' ) );
var msPanel = addPanel( new Stats.Panel( 'MS', '#0f0', '#020' ) );
if ( self.performance && self.performance.memory ) {
var memPanel = addPanel( new Stats.Panel( 'MB', '#f08', '#201' ) );
}
showPanel( 0 );
return {
REVISION: 16,
dom: container,
addPanel: addPanel,
showPanel: showPanel,
begin: function () {
beginTime = ( performance || Date ).now();
},
end: function () {
frames ++;
var time = ( performance || Date ).now();
msPanel.update( time - beginTime, 200 );
if ( time >= prevTime + 1000 ) {
fpsPanel.update( ( frames * 1000 ) / ( time - prevTime ), 100 );
prevTime = time;
frames = 0;
if ( memPanel ) {
var memory = performance.memory;
memPanel.update( memory.usedJSHeapSize / 1048576, memory.jsHeapSizeLimit / 1048576 );
}
}
return time;
},
update: function () {
beginTime = this.end();
},
// Backwards Compatibility
domElement: container,
setMode: showPanel
};
};
Stats.Panel = function ( name, fg, bg ) {
var min = Infinity, max = 0, round = Math.round;
var PR = round( window.devicePixelRatio || 1 );
var WIDTH = 80 * PR, HEIGHT = 48 * PR,
TEXT_X = 3 * PR, TEXT_Y = 2 * PR,
GRAPH_X = 3 * PR, GRAPH_Y = 15 * PR,
GRAPH_WIDTH = 74 * PR, GRAPH_HEIGHT = 30 * PR;
var canvas = document.createElement( 'canvas' );
canvas.width = WIDTH;
canvas.height = HEIGHT;
canvas.style.cssText = 'width:80px;height:48px';
var context = canvas.getContext( '2d' );
context.font = 'bold ' + ( 9 * PR ) + 'px Helvetica,Arial,sans-serif';
context.textBaseline = 'top';
context.fillStyle = bg;
context.fillRect( 0, 0, WIDTH, HEIGHT );
context.fillStyle = fg;
context.fillText( name, TEXT_X, TEXT_Y );
context.fillRect( GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT );
context.fillStyle = bg;
context.globalAlpha = 0.9;
context.fillRect( GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT );
return {
dom: canvas,
update: function ( value, maxValue ) {
min = Math.min( min, value );
max = Math.max( max, value );
context.fillStyle = bg;
context.globalAlpha = 1;
context.fillRect( 0, 0, WIDTH, GRAPH_Y );
context.fillStyle = fg;
context.fillText( round( value ) + ' ' + name + ' (' + round( min ) + '-' + round( max ) + ')', TEXT_X, TEXT_Y );
context.drawImage( canvas, GRAPH_X + PR, GRAPH_Y, GRAPH_WIDTH - PR, GRAPH_HEIGHT, GRAPH_X, GRAPH_Y, GRAPH_WIDTH - PR, GRAPH_HEIGHT );
context.fillRect( GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, GRAPH_HEIGHT );
context.fillStyle = bg;
context.globalAlpha = 0.9;
context.fillRect( GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, round( ( 1 - ( value / maxValue ) ) * GRAPH_HEIGHT ) );
}
};
};
export { Stats as default };
变量控制GUI
创建一个小窗口，能够方便的控制变量
安装 npm install --save dat.gui
demo
<template>
<div>
<div id="Stats-output"></div>
<div ref="ThreeBox"></div>
</div>
</template>
<script>
/* eslint-disable */
import * as THREE from 'three';
import Stats from '../assets/js/stats.js';
import * as dat from 'dat.gui';
var scene = new THREE.Scene(); // 场景，用来保存渲染的物体
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth/window.innerHeight, 0.1, 1000 ); // 相机，定义渲染的物体
var mousecontrols = new THREE.OrbitControls(camera);
var renderer = new THREE.WebGLRenderer(); // 渲染器，定义角度，WebGLRenderer表示使用显卡来渲染场景
renderer.setClearColor(0xEEEEEE); // 设置背景颜色
renderer.setSize( window.innerWidth, window.innerHeight ); // 设置背景大小
renderer.shadowMap.enabled = true; // 开启阴影映射
var axes= new THREE.AxesHelper(20); // 创建坐标轴
scene.add(axes);
var spotLight = new THREE.SpotLight(0xffffff); // 创建光源
spotLight.position.set(-40, 60, -10);
spotLight.castShadow = true; // 此光源开启阴影效果
scene.add(spotLight);
var planeGeometry = new THREE.PlaneGeometry(60,20,1,1); // 创建平面，宽60高20
var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff}); // 设置平面的材质,MeshBasicMaterial材质不会对光源产生效果
var plane = new THREE.Mesh(planeGeometry,planeMaterial); // 将平面放置到Mesh对象中
plane.rotation.x = -0.5*Math.PI;
plane.position.x = 15;
plane.position.y = 0;
plane.position.z = 0;
plane.receiveShadow = true; // 生成阴影
scene.add(plane);
var cubeGeometry = new THREE.CubeGeometry(4,4,4); // 创建立方体
var cubeMaterial = new THREE.MeshLambertMaterial({color : 0xff0000}); // 可以添加，wireframe: true表示线框
var cube= new THREE.Mesh(cubeGeometry, cubeMaterial );
cube.position.x = -4;
cube.position.y = 3;
cube.position.z = 0;
cube.castShadow = true;
scene.add(cube);
var sphereGeometry = new THREE.SphereGeometry(4,20,20); // 创建球体
var sphereMaterial = new THREE.MeshLambertMaterial({color: 0x7777ff});
var sphere= new THREE.Mesh(sphereGeometry,sphereMaterial);
sphere.position.x = 20;
sphere.position.y = 4 ;
sphere.position.z = 2 ;
sphere.castShadow = true;
scene.add (sphere) ;
camera.position.x = -30;
camera.position.y = 40;
camera.position.z = 30;
camera.lookAt(scene.position); // 场景中心
let step = 0;
const gui = new dat.GUI(); // 创建gui工具，控制变量
var controls= new function() {
this.rotationSpeed = 0.02;
this.bouncingSpeed = 0.03 ;
}
gui.add(controls,'rotationSpeed', 0, 0.5);
gui.add(controls,'bouncingSpeed', 0, 0.5);
export default {
mounted() {
this.$refs.ThreeBox.appendChild( renderer.domElement );
renderer.render(scene, camera );
this.renderScene();
},
methods: {
renderScene(){
let stats = this.initStats(); // stats.js代码如下，用来监听动画帧率的
stats.begin();
cube.rotation.x += 0.02; // 旋转正方体
cube.rotation.y += 0.02;
cube.rotation.z += 0.02;
step+=0.04; // 球运动的速度
sphere.position.x = 20+(10*(Math.cos(step)));
sphere.position.y = 2+(10*Math.abs(Math.sin(step)));
renderer.render(scene, camera);
stats.end();
requestAnimationFrame(this.renderScene); // 重画场景，从而方便应用动画效果
},
initStats () {
var stats= new Stats ();
stats.showPanel( 1 );
this.$refs.StatsBox.appendChild(stats.dom);
return stats;
}
}
}
</script>
