You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
372 lines
7.2 KiB
372 lines
7.2 KiB
3 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - instancing - performance</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">
|
||
|
|
<style>
|
||
|
|
#info {
|
||
|
|
background-color: rgba(0,0,0,0.75);
|
||
|
|
}
|
||
|
|
|
||
|
|
.lil-gui .gui-stats {
|
||
|
|
line-height: var(--widget-height);
|
||
|
|
padding: var(--padding);
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<div id="info">
|
||
|
|
|
||
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - instancing - performance
|
||
|
|
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div id="container"></div>
|
||
|
|
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<script type="importmap">
|
||
|
|
{
|
||
|
|
"imports": {
|
||
|
|
"three": "../build/three.module.js",
|
||
|
|
"three/addons/": "./jsm/"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
import Stats from 'three/addons/libs/stats.module.js';
|
||
|
|
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
||
|
|
|
||
|
|
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
||
|
|
import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
|
||
|
|
|
||
|
|
let container, stats, gui, guiStatsEl;
|
||
|
|
let camera, controls, scene, renderer, material;
|
||
|
|
|
||
|
|
// gui
|
||
|
|
|
||
|
|
const Method = {
|
||
|
|
INSTANCED: 'INSTANCED',
|
||
|
|
MERGED: 'MERGED',
|
||
|
|
NAIVE: 'NAIVE'
|
||
|
|
};
|
||
|
|
|
||
|
|
const api = {
|
||
|
|
method: Method.INSTANCED,
|
||
|
|
count: 1000
|
||
|
|
};
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
init();
|
||
|
|
initMesh();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
function clean() {
|
||
|
|
|
||
|
|
const meshes = [];
|
||
|
|
|
||
|
|
scene.traverse( function ( object ) {
|
||
|
|
|
||
|
|
if ( object.isMesh ) meshes.push( object );
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
for ( let i = 0; i < meshes.length; i ++ ) {
|
||
|
|
|
||
|
|
const mesh = meshes[ i ];
|
||
|
|
mesh.material.dispose();
|
||
|
|
mesh.geometry.dispose();
|
||
|
|
|
||
|
|
scene.remove( mesh );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const randomizeMatrix = function () {
|
||
|
|
|
||
|
|
const position = new THREE.Vector3();
|
||
|
|
const rotation = new THREE.Euler();
|
||
|
|
const quaternion = new THREE.Quaternion();
|
||
|
|
const scale = new THREE.Vector3();
|
||
|
|
|
||
|
|
return function ( matrix ) {
|
||
|
|
|
||
|
|
position.x = Math.random() * 40 - 20;
|
||
|
|
position.y = Math.random() * 40 - 20;
|
||
|
|
position.z = Math.random() * 40 - 20;
|
||
|
|
|
||
|
|
rotation.x = Math.random() * 2 * Math.PI;
|
||
|
|
rotation.y = Math.random() * 2 * Math.PI;
|
||
|
|
rotation.z = Math.random() * 2 * Math.PI;
|
||
|
|
|
||
|
|
quaternion.setFromEuler( rotation );
|
||
|
|
|
||
|
|
scale.x = scale.y = scale.z = Math.random() * 1;
|
||
|
|
|
||
|
|
matrix.compose( position, quaternion, scale );
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
}();
|
||
|
|
|
||
|
|
function initMesh() {
|
||
|
|
|
||
|
|
clean();
|
||
|
|
|
||
|
|
// make instances
|
||
|
|
new THREE.BufferGeometryLoader()
|
||
|
|
.setPath( 'models/json/' )
|
||
|
|
.load( 'suzanne_buffergeometry.json', function ( geometry ) {
|
||
|
|
|
||
|
|
material = new THREE.MeshNormalMaterial();
|
||
|
|
|
||
|
|
geometry.computeVertexNormals();
|
||
|
|
|
||
|
|
console.time( api.method + ' (build)' );
|
||
|
|
|
||
|
|
switch ( api.method ) {
|
||
|
|
|
||
|
|
case Method.INSTANCED:
|
||
|
|
makeInstanced( geometry );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Method.MERGED:
|
||
|
|
makeMerged( geometry );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Method.NAIVE:
|
||
|
|
makeNaive( geometry );
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
console.timeEnd( api.method + ' (build)' );
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function makeInstanced( geometry ) {
|
||
|
|
|
||
|
|
const matrix = new THREE.Matrix4();
|
||
|
|
const mesh = new THREE.InstancedMesh( geometry, material, api.count );
|
||
|
|
|
||
|
|
for ( let i = 0; i < api.count; i ++ ) {
|
||
|
|
|
||
|
|
randomizeMatrix( matrix );
|
||
|
|
mesh.setMatrixAt( i, matrix );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
scene.add( mesh );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
const geometryByteLength = getGeometryByteLength( geometry );
|
||
|
|
|
||
|
|
guiStatsEl.innerHTML = [
|
||
|
|
|
||
|
|
'<i>GPU draw calls</i>: 1',
|
||
|
|
'<i>GPU memory</i>: ' + formatBytes( api.count * 16 + geometryByteLength, 2 )
|
||
|
|
|
||
|
|
].join( '<br/>' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function makeMerged( geometry ) {
|
||
|
|
|
||
|
|
const geometries = [];
|
||
|
|
const matrix = new THREE.Matrix4();
|
||
|
|
|
||
|
|
for ( let i = 0; i < api.count; i ++ ) {
|
||
|
|
|
||
|
|
randomizeMatrix( matrix );
|
||
|
|
|
||
|
|
const instanceGeometry = geometry.clone();
|
||
|
|
instanceGeometry.applyMatrix4( matrix );
|
||
|
|
|
||
|
|
geometries.push( instanceGeometry );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const mergedGeometry = BufferGeometryUtils.mergeBufferGeometries( geometries );
|
||
|
|
|
||
|
|
scene.add( new THREE.Mesh( mergedGeometry, material ) );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
guiStatsEl.innerHTML = [
|
||
|
|
|
||
|
|
'<i>GPU draw calls</i>: 1',
|
||
|
|
'<i>GPU memory</i>: ' + formatBytes( getGeometryByteLength( mergedGeometry ), 2 )
|
||
|
|
|
||
|
|
].join( '<br/>' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function makeNaive( geometry ) {
|
||
|
|
|
||
|
|
const matrix = new THREE.Matrix4();
|
||
|
|
|
||
|
|
for ( let i = 0; i < api.count; i ++ ) {
|
||
|
|
|
||
|
|
randomizeMatrix( matrix );
|
||
|
|
|
||
|
|
const mesh = new THREE.Mesh( geometry, material );
|
||
|
|
mesh.applyMatrix4( matrix );
|
||
|
|
|
||
|
|
scene.add( mesh );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
const geometryByteLength = getGeometryByteLength( geometry );
|
||
|
|
|
||
|
|
guiStatsEl.innerHTML = [
|
||
|
|
|
||
|
|
'<i>GPU draw calls</i>: ' + api.count,
|
||
|
|
'<i>GPU memory</i>: ' + formatBytes( api.count * 16 + geometryByteLength, 2 )
|
||
|
|
|
||
|
|
].join( '<br/>' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
const width = window.innerWidth;
|
||
|
|
const height = window.innerHeight;
|
||
|
|
|
||
|
|
// camera
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 70, width / height, 1, 100 );
|
||
|
|
camera.position.z = 30;
|
||
|
|
|
||
|
|
// renderer
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( width, height );
|
||
|
|
renderer.outputEncoding = THREE.sRGBEncoding;
|
||
|
|
|
||
|
|
container = document.getElementById( 'container' );
|
||
|
|
container.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
// scene
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
scene.background = new THREE.Color( 0xffffff );
|
||
|
|
|
||
|
|
// controls
|
||
|
|
|
||
|
|
controls = new OrbitControls( camera, renderer.domElement );
|
||
|
|
controls.autoRotate = true;
|
||
|
|
|
||
|
|
// stats
|
||
|
|
|
||
|
|
stats = new Stats();
|
||
|
|
container.appendChild( stats.dom );
|
||
|
|
|
||
|
|
// gui
|
||
|
|
|
||
|
|
gui = new GUI();
|
||
|
|
gui.add( api, 'method', Method ).onChange( initMesh );
|
||
|
|
gui.add( api, 'count', 1, 10000 ).step( 1 ).onChange( initMesh );
|
||
|
|
|
||
|
|
const perfFolder = gui.addFolder( 'Performance' );
|
||
|
|
|
||
|
|
guiStatsEl = document.createElement( 'div' );
|
||
|
|
guiStatsEl.classList.add( 'gui-stats' );
|
||
|
|
|
||
|
|
perfFolder.$children.appendChild( guiStatsEl );
|
||
|
|
perfFolder.open();
|
||
|
|
|
||
|
|
// listeners
|
||
|
|
|
||
|
|
window.addEventListener( 'resize', onWindowResize );
|
||
|
|
|
||
|
|
Object.assign( window, { scene } );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
function onWindowResize() {
|
||
|
|
|
||
|
|
const width = window.innerWidth;
|
||
|
|
const height = window.innerHeight;
|
||
|
|
|
||
|
|
camera.aspect = width / height;
|
||
|
|
camera.updateProjectionMatrix();
|
||
|
|
|
||
|
|
renderer.setSize( width, height );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate() {
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
|
||
|
|
controls.update();
|
||
|
|
stats.update();
|
||
|
|
|
||
|
|
render();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function render() {
|
||
|
|
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
function getGeometryByteLength( geometry ) {
|
||
|
|
|
||
|
|
let total = 0;
|
||
|
|
|
||
|
|
if ( geometry.index ) total += geometry.index.array.byteLength;
|
||
|
|
|
||
|
|
for ( const name in geometry.attributes ) {
|
||
|
|
|
||
|
|
total += geometry.attributes[ name ].array.byteLength;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return total;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// Source: https://stackoverflow.com/a/18650828/1314762
|
||
|
|
function formatBytes( bytes, decimals ) {
|
||
|
|
|
||
|
|
if ( bytes === 0 ) return '0 bytes';
|
||
|
|
|
||
|
|
const k = 1024;
|
||
|
|
const dm = decimals < 0 ? 0 : decimals;
|
||
|
|
const sizes = [ 'bytes', 'KB', 'MB' ];
|
||
|
|
|
||
|
|
const i = Math.floor( Math.log( bytes ) / Math.log( k ) );
|
||
|
|
|
||
|
|
return parseFloat( ( bytes / Math.pow( k, i ) ).toFixed( dm ) ) + ' ' + sizes[ i ];
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|