javascript
/
three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - performance [nodes]</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org" target="_blank">three.js</a><span class="white"> - NodeMaterial Performance</span><br />
			<br>
			<b>Node Material System</b>
			<br>
			<div>
				Standard<b>Node</b>Material |
				<span id="node" class="white">None</span>
			</div>
			<div>
				MeshStandard<b>Node</b>Material |
				<span id="nodeBased" class="white">None</span>
			</div>
			<br>
			<b>Current Material System</b>
			<br>
			<div>
				MeshStandardMaterial |
				<span id="default" class="white">None</span>
			</div>
			<br>
			<a id="startButton" href="javascript:void(0);">Click to benchmark</a>
		</div>

		<!-- Import maps polyfill -->
		<!-- Remove this when import maps will be widely supported -->
		<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import Stats from './jsm/libs/stats.module.js';

			import {
				StandardNodeMaterial,
				MeshStandardNodeMaterial
			} from './jsm/nodes/Nodes.js';

			let stats;

			let camera, scene, renderer;

			let geometry;

			let mouseX = 0, mouseY = 0;

			let windowHalfX = window.innerWidth / 2;
			let windowHalfY = window.innerHeight / 2;

			const meshes = [];

			document.addEventListener( 'mousemove', onDocumentMouseMove );

			init();
			animate();

			function createScene( MaterialClass, count ) {

				count = count !== undefined ? count : 70;

				let i = 0;

				for ( i = 0; i < meshes.length; i ++ ) {

					meshes[ i ].material.dispose();

					scene.remove( meshes[ i ] );

				}

				meshes.length = 0;

				for ( i = 0; i < count; i ++ ) {

					const material = new MaterialClass(),
						color = 0xFFFFFF * Math.random();

					if ( material.color.isNode ) material.color.value.setHex( color );
					else material.color.setHex( color );

					// prevent share code
					material.defines.UUID = material.uuid;

					const mesh = new THREE.Mesh( geometry, material );

					mesh.position.x = Math.random() * 1000 - 500;
					mesh.position.y = Math.random() * 1000 - 500;
					mesh.position.z = Math.random() * 1000 - 500;
					mesh.rotation.x = Math.random() * 2 * Math.PI;
					mesh.rotation.y = Math.random() * 2 * Math.PI;
					mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 50 + 100;
					mesh.matrixAutoUpdate = false;
					mesh.updateMatrix();

					scene.add( mesh );

					meshes.push( mesh );

				}

			}

			function benchmark() {

				let time, benchmarkTime;

				// Stabilizes CPU

				createScene( THREE.MeshStandardMaterial, 10 );

				render();

				// Standard *Node* Material

				time = performance.now();

				createScene( StandardNodeMaterial );

				render();

				benchmarkTime = ( performance.now() - time ) / 1000;

				document.getElementById( 'node' ).textContent = benchmarkTime.toFixed( 3 ) + ' seconds';

				// Mesh Standard *Node* Material

				time = performance.now();

				createScene( MeshStandardNodeMaterial );

				render();

				benchmarkTime = ( performance.now() - time ) / 1000;

				document.getElementById( 'nodeBased' ).textContent = benchmarkTime.toFixed( 3 ) + ' seconds';

				// Mesh Standard Material

				time = performance.now();

				createScene( THREE.MeshStandardMaterial );

				render();

				benchmarkTime = ( performance.now() - time ) / 1000;

				document.getElementById( 'default' ).textContent = benchmarkTime.toFixed( 3 ) + ' seconds';

			}

			document.getElementById( 'startButton' ).addEventListener( 'click', function () {

				if ( geometry ) {

					benchmark();

				}

			} );

			function init() {

				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 1800;

				scene = new THREE.Scene();
				scene.add( new THREE.PointLight( 0xFFFFFF ) );
				//scene.background = new THREE.Color( 0xffffff );

				const loader = new THREE.BufferGeometryLoader();
				loader.load( 'models/json/suzanne_buffergeometry.json', function ( geo ) {

					geo.computeVertexNormals();

					geometry = geo;

				} );

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );

				container.appendChild( renderer.domElement );

				stats = new Stats();
				container.appendChild( stats.dom );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function onDocumentMouseMove( event ) {

				mouseX = ( event.clientX - windowHalfX ) * 10;
				mouseY = ( event.clientY - windowHalfY ) * 10;

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;

				camera.lookAt( scene.position );

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>