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190 lines
4.7 KiB
HTML
190 lines
4.7 KiB
HTML
2 months 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 - rapier3d basic</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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<style>
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body {
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color: #333;
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}
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</style>
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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 - <a href="https://github.com/dimforge/rapier.js" target="_blank">rapier</a> basic
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</div>
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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 { RapierPhysics } from 'three/addons/physics/RapierPhysics.js';
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import { RapierHelper } from 'three/addons/helpers/RapierHelper.js';
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import Stats from 'three/addons/libs/stats.module.js';
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let camera, scene, renderer, stats, controls;
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let physics, physicsHelper;
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init();
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async function init() {
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xbfd1e5 );
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camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.set( 0, 3, 10 );
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const ambient = new THREE.HemisphereLight( 0x555555, 0xFFFFFF );
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scene.add( ambient );
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const light = new THREE.DirectionalLight( 0xffffff, 4 );
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light.position.set( 0, 12.5, 12.5 );
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light.castShadow = true;
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light.shadow.radius = 3;
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light.shadow.blurSamples = 8;
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light.shadow.mapSize.width = 1024;
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light.shadow.mapSize.height = 1024;
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const size = 10;
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light.shadow.camera.left = - size;
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light.shadow.camera.bottom = - size;
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light.shadow.camera.right = size;
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light.shadow.camera.top = size;
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light.shadow.camera.near = 1;
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light.shadow.camera.far = 50;
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scene.add( light );
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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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document.body.appendChild( renderer.domElement );
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renderer.setAnimationLoop( animate );
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controls = new OrbitControls( camera, renderer.domElement );
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controls.enableDamping = true;
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controls.target = new THREE.Vector3( 0, 2, 0 );
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controls.update();
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const geometry = new THREE.BoxGeometry( 10, 0.5, 10 );
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const material = new THREE.MeshStandardMaterial( { color: 0xFFFFFF } );
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const floor = new THREE.Mesh( geometry, material );
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floor.receiveShadow = true;
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floor.position.y = - 0.25;
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floor.userData.physics = { mass: 0 };
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scene.add( floor );
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new THREE.TextureLoader().load( 'textures/grid.png', function ( texture ) {
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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texture.repeat.set( 20, 20 );
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floor.material.map = texture;
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floor.material.needsUpdate = true;
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} );
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stats = new Stats();
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document.body.appendChild( stats.dom );
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initPhysics();
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onWindowResize();
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window.addEventListener( 'resize', onWindowResize, false );
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}
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async function initPhysics() {
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//Initialize physics engine using the script in the jsm/physics folder
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physics = await RapierPhysics();
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physics.addScene( scene );
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addBody( );
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//Optionally display collider outlines
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physicsHelper = new RapierHelper( physics.world );
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scene.add( physicsHelper );
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setInterval( addBody, 1000 );
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}
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function addBody( ) {
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const geometry = ( Math.random() > 0.5 ) ? new THREE.SphereGeometry( 0.5 ) : new THREE.BoxGeometry( 1, 1, 1 );
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const material = new THREE.MeshStandardMaterial( { color: Math.floor( Math.random() * 0xFFFFFF ) } );
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const mesh = new THREE.Mesh( geometry, material );
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mesh.castShadow = true;
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mesh.position.set( Math.random() * 2 - 1, Math.random() * 3 + 6, Math.random() * 2 - 1 );
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scene.add( mesh );
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//parameter 2 - mass, parameter 3 - restitution ( how bouncy )
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physics.addMesh( mesh, 1, 0.5 );
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}
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function onWindowResize( ) {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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for ( const object of scene.children ) {
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if ( object.isMesh ) {
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if ( object.position.y < - 10 ) {
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scene.remove( object );
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physics.removeMesh( object );
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}
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}
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}
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if ( physicsHelper ) physicsHelper.update();
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controls.update();
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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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