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173 lines
4.5 KiB
173 lines
4.5 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js physics - ammo.js instancing</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> physics - ammo.js instancing
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</div>
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<script src="js/libs/ammo.wasm.js"></script>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { AmmoPhysics } from 'three/addons/physics/AmmoPhysics.js';
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import Stats from 'three/addons/libs/stats.module.js';
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let camera, scene, renderer, stats;
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let physics, position;
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let boxes, spheres;
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init();
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async function init() {
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physics = await AmmoPhysics();
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position = new THREE.Vector3();
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//
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.set( - 1, 1.5, 2 );
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camera.lookAt( 0, 0.5, 0 );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x666666 );
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const hemiLight = new THREE.HemisphereLight();
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hemiLight.intensity = 0.35;
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scene.add( hemiLight );
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const dirLight = new THREE.DirectionalLight();
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dirLight.position.set( 5, 5, 5 );
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dirLight.castShadow = true;
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dirLight.shadow.camera.zoom = 2;
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scene.add( dirLight );
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const floor = new THREE.Mesh(
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new THREE.BoxGeometry( 10, 5, 10 ),
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new THREE.ShadowMaterial( { color: 0x111111 } )
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);
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floor.position.y = - 2.5;
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floor.receiveShadow = true;
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scene.add( floor );
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physics.addMesh( floor );
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//
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const material = new THREE.MeshLambertMaterial();
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const matrix = new THREE.Matrix4();
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const color = new THREE.Color();
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// Boxes
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const geometryBox = new THREE.BoxGeometry( 0.1, 0.1, 0.1 );
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boxes = new THREE.InstancedMesh( geometryBox, material, 100 );
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boxes.instanceMatrix.setUsage( THREE.DynamicDrawUsage ); // will be updated every frame
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boxes.castShadow = true;
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boxes.receiveShadow = true;
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scene.add( boxes );
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for ( let i = 0; i < boxes.count; i ++ ) {
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matrix.setPosition( Math.random() - 0.5, Math.random() * 2, Math.random() - 0.5 );
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boxes.setMatrixAt( i, matrix );
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boxes.setColorAt( i, color.setHex( 0xffffff * Math.random() ) );
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}
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physics.addMesh( boxes, 1 );
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// Spheres
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const geometrySphere = new THREE.IcosahedronGeometry( 0.075, 3 );
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spheres = new THREE.InstancedMesh( geometrySphere, material, 100 );
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spheres.instanceMatrix.setUsage( THREE.DynamicDrawUsage ); // will be updated every frame
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spheres.castShadow = true;
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spheres.receiveShadow = true;
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scene.add( spheres );
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for ( let i = 0; i < spheres.count; i ++ ) {
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matrix.setPosition( Math.random() - 0.5, Math.random() * 2, Math.random() - 0.5 );
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spheres.setMatrixAt( i, matrix );
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spheres.setColorAt( i, color.setHex( 0xffffff * Math.random() ) );
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}
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physics.addMesh( spheres, 1 );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.shadowMap.enabled = true;
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renderer.outputEncoding = THREE.sRGBEncoding;
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document.body.appendChild( renderer.domElement );
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stats = new Stats();
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document.body.appendChild( stats.dom );
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//
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.target.y = 0.5;
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controls.update();
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animate();
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setInterval( () => {
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let index = Math.floor( Math.random() * boxes.count );
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position.set( 0, Math.random() + 1, 0 );
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physics.setMeshPosition( boxes, position, index );
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//
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index = Math.floor( Math.random() * spheres.count );
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position.set( 0, Math.random() + 1, 0 );
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physics.setMeshPosition( spheres, position, index );
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}, 1000 / 60 );
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}
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function animate() {
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requestAnimationFrame( animate );
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renderer.render( scene, camera );
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stats.update();
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}
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</script>
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</body>
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</html>
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