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-<html lang="en">
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- <head>
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- <title>Convex buffer object breaking example</title>
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- <meta charset="utf-8">
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- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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- <style>
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- body {
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- color: #61443e;
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- font-family:Monospace;
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- font-size:13px;
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- text-align:center;
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-
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- background-color: #bfd1e5;
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- margin: 0px;
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- overflow: hidden;
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- }
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-
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- #info {
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- position: absolute;
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- top: 0px; width: 100%;
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- padding: 5px;
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- }
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-
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- a {
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- color: #a06851;
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- }
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-
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- </style>
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- </head>
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- <body>
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-
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- <div id="info">Physics threejs demo with convex objects breaking in real time<br />Press mouse to throw balls and move the camera.</div>
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- <div id="container"><br /><br /><br /><br /><br />Loading...</div>
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-
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- <script src="../build/three.js"></script>
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- <script src="js/libs/ammo.js"></script>
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- <script src="js/controls/OrbitControls.js"></script>
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- <script src="js/Detector.js"></script>
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- <script src="js/libs/stats.min.js"></script>
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- <script src="js/ConvexBufferObjectBreaker.js"></script>
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- <script src="js/QuickHull.js"></script>
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- <script src="js/geometries/ConvexGeometry.js"></script>
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-
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- <script>
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-
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- // Detects webgl
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- if ( ! Detector.webgl ) {
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- Detector.addGetWebGLMessage();
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- document.getElementById( 'container' ).innerHTML = "";
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- }
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-
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- // - Global variables -
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-
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- // Graphics variables
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- var container, stats;
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- var camera, controls, scene, renderer;
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- var textureLoader;
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- var clock = new THREE.Clock();
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-
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- var mouseCoords = new THREE.Vector2();
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- var raycaster = new THREE.Raycaster();
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- var ballMaterial = new THREE.MeshPhongMaterial( { color: 0x202020 } );
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-
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- // Physics variables
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- var gravityConstant = 7.8;
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- var collisionConfiguration;
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- var dispatcher;
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- var broadphase;
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- var solver;
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- var physicsWorld;
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- var margin = 0.05;
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-
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- var convexBreaker = new THREE.ConvexBufferObjectBreaker();
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-
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- // Rigid bodies include all movable objects
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- var rigidBodies = [];
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-
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- var pos = new THREE.Vector3();
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- var quat = new THREE.Quaternion();
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- var transformAux1 = new Ammo.btTransform();
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- var tempBtVec3_1 = new Ammo.btVector3( 0, 0, 0 );
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-
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- var time = 0;
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-
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- var objectsToRemove = [];
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- for ( var i = 0; i < 500; i++ ) {
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- objectsToRemove[ i ] = null;
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- }
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- var numObjectsToRemove = 0;
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-
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- var impactPoint = new THREE.Vector3();
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- var impactNormal = new THREE.Vector3();
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-
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- // - Main code -
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-
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- init();
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- animate();
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-
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-
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- // - Functions -
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-
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- function init() {
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-
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- initGraphics();
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-
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- initPhysics();
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-
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- createObjects();
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-
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- initInput();
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-
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- }
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-
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- function initGraphics() {
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-
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- container = document.getElementById( 'container' );
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-
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- camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.2, 2000 );
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-
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- scene = new THREE.Scene();
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- scene.background = new THREE.Color( 0xbfd1e5 );
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-
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- camera.position.set( -14, 8, 16 );
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-
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- controls = new THREE.OrbitControls( camera );
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- controls.target.set( 0, 2, 0 );
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- controls.update();
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-
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- renderer = new THREE.WebGLRenderer();
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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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-
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- textureLoader = new THREE.TextureLoader();
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-
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- var ambientLight = new THREE.AmbientLight( 0x707070 );
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- scene.add( ambientLight );
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-
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- var light = new THREE.DirectionalLight( 0xffffff, 1 );
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- light.position.set( -10, 18, 5 );
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- light.castShadow = true;
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- var d = 14;
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- light.shadow.camera.left = -d;
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- light.shadow.camera.right = d;
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- light.shadow.camera.top = d;
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- light.shadow.camera.bottom = -d;
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-
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- light.shadow.camera.near = 2;
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- light.shadow.camera.far = 50;
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-
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- light.shadow.mapSize.x = 1024;
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- light.shadow.mapSize.y = 1024;
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-
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- scene.add( light );
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-
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-
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- container.innerHTML = "";
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-
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- container.appendChild( renderer.domElement );
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-
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- stats = new Stats();
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- stats.domElement.style.position = 'absolute';
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- stats.domElement.style.top = '0px';
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- container.appendChild( stats.domElement );
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-
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- //
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-
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- window.addEventListener( 'resize', onWindowResize, false );
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-
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- }
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-
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- function initPhysics() {
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-
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- // Physics configuration
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-
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- collisionConfiguration = new Ammo.btDefaultCollisionConfiguration();
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- dispatcher = new Ammo.btCollisionDispatcher( collisionConfiguration );
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- broadphase = new Ammo.btDbvtBroadphase();
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- solver = new Ammo.btSequentialImpulseConstraintSolver();
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- physicsWorld = new Ammo.btDiscreteDynamicsWorld( dispatcher, broadphase, solver, collisionConfiguration );
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- physicsWorld.setGravity( new Ammo.btVector3( 0, - gravityConstant, 0 ) );
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-
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- }
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-
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- function createObject( mass, halfExtents, pos, quat, material ) {
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-
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- var object = new THREE.Mesh( new THREE.BoxBufferGeometry( halfExtents.x * 2, halfExtents.y * 2, halfExtents.z * 2 ), material );
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- object.position.copy( pos );
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- object.quaternion.copy( quat );
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- convexBreaker.prepareBreakableObject( object, mass, new THREE.Vector3(), new THREE.Vector3(), true );
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- createDebrisFromBreakableObject( object );
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-
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- }
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-
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- function createObjects() {
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-
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- // Ground
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- pos.set( 0, - 0.5, 0 );
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- quat.set( 0, 0, 0, 1 );
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- var ground = createParalellepipedWithPhysics( 40, 1, 40, 0, pos, quat, new THREE.MeshPhongMaterial( { color: 0xFFFFFF } ) );
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- ground.receiveShadow = true;
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- 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( 40, 40 );
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- ground.material.map = texture;
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- ground.material.needsUpdate = true;
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- } );
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-
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- // Tower 1
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- var towerMass = 1000;
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- var towerHalfExtents = new THREE.Vector3( 2, 5, 2 );
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- pos.set( -8, 5, 0 );
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- quat.set( 0, 0, 0, 1 );
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- createObject( towerMass, towerHalfExtents, pos, quat, createMaterial( 0xB03014 ) );
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-
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- // Tower 2
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- pos.set( 8, 5, 0 );
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- quat.set( 0, 0, 0, 1 );
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- createObject( towerMass, towerHalfExtents, pos, quat, createMaterial( 0xB03214 ) );
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-
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- //Bridge
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- var bridgeMass = 100;
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- var bridgeHalfExtents = new THREE.Vector3( 7, 0.2, 1.5 );
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- pos.set( 0, 10.2, 0 );
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- quat.set( 0, 0, 0, 1 );
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- createObject( bridgeMass, bridgeHalfExtents, pos, quat, createMaterial( 0xB3B865 ) );
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-
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- // Stones
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- var stoneMass = 120;
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- var stoneHalfExtents = new THREE.Vector3( 1, 2, 0.15 );
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- var numStones = 8;
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- quat.set( 0, 0, 0, 1 );
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- for ( var i = 0; i < numStones; i++ ) {
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-
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- pos.set( 0, 2, 15 * ( 0.5 - i / ( numStones + 1 ) ) );
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-
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- createObject( stoneMass, stoneHalfExtents, pos, quat, createMaterial( 0xB0B0B0 ) );
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-
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- }
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-
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- // Mountain
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- var mountainMass = 860;
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- var mountainHalfExtents = new THREE.Vector3( 4, 5, 4 );
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- pos.set( 5, mountainHalfExtents.y * 0.5, - 7 );
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- quat.set( 0, 0, 0, 1 );
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- var mountainPoints = [];
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- mountainPoints.push( new THREE.Vector3( mountainHalfExtents.x, - mountainHalfExtents.y, mountainHalfExtents.z ) );
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- mountainPoints.push( new THREE.Vector3( - mountainHalfExtents.x, - mountainHalfExtents.y, mountainHalfExtents.z ) );
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- mountainPoints.push( new THREE.Vector3( mountainHalfExtents.x, - mountainHalfExtents.y, - mountainHalfExtents.z ) );
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- mountainPoints.push( new THREE.Vector3( - mountainHalfExtents.x, - mountainHalfExtents.y, - mountainHalfExtents.z ) );
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- mountainPoints.push( new THREE.Vector3( 0, mountainHalfExtents.y, 0 ) );
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- var mountain = new THREE.Mesh( new THREE.ConvexBufferGeometry( mountainPoints ), createMaterial( 0xB03814 ) );
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- mountain.position.copy( pos );
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- mountain.quaternion.copy( quat );
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- convexBreaker.prepareBreakableObject( mountain, mountainMass, new THREE.Vector3(), new THREE.Vector3(), true );
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- createDebrisFromBreakableObject( mountain );
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-
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- }
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-
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- function createParalellepipedWithPhysics( sx, sy, sz, mass, pos, quat, material ) {
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-
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- var object = new THREE.Mesh( new THREE.BoxBufferGeometry( sx, sy, sz, 1, 1, 1 ), material );
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- var shape = new Ammo.btBoxShape( new Ammo.btVector3( sx * 0.5, sy * 0.5, sz * 0.5 ) );
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- shape.setMargin( margin );
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-
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- createRigidBody( object, shape, mass, pos, quat );
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-
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- return object;
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-
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- }
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-
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- function createDebrisFromBreakableObject( object ) {
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-
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- object.castShadow = true;
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- object.receiveShadow = true;
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-
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- var shape = createConvexHullPhysicsShape( object.geometry.attributes.position.array );
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- shape.setMargin( margin );
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-
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- var body = createRigidBody( object, shape, object.userData.mass, null, null, object.userData.velocity, object.userData.angularVelocity );
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-
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- // Set pointer back to the three object only in the debris objects
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- var btVecUserData = new Ammo.btVector3( 0, 0, 0 );
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- btVecUserData.threeObject = object;
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- body.setUserPointer( btVecUserData );
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-
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- }
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-
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- function removeDebris( object ) {
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-
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- scene.remove( object );
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-
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- physicsWorld.removeRigidBody( object.userData.physicsBody );
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-
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- }
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-
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- function createConvexHullPhysicsShape( coords ) {
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-
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- var shape = new Ammo.btConvexHullShape();
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-
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- for ( var i = 0, il = coords.length; i < il; i+= 3 ) {
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- var p = coords[ i ];
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- this.tempBtVec3_1.setValue( coords[ i ], coords[ i + 1 ], coords[ i + 2 ] );
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- var lastOne = ( i >= ( il - 3 ) );
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- shape.addPoint( this.tempBtVec3_1, lastOne );
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- }
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-
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- return shape;
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-
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- }
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-
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- function createRigidBody( object, physicsShape, mass, pos, quat, vel, angVel ) {
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-
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- if ( pos ) {
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- object.position.copy( pos );
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- }
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- else {
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- pos = object.position;
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- }
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- if ( quat ) {
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- object.quaternion.copy( quat );
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- }
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- else {
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- quat = object.quaternion;
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- }
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-
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- var transform = new Ammo.btTransform();
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- transform.setIdentity();
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- transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
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- transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
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- var motionState = new Ammo.btDefaultMotionState( transform );
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-
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- var localInertia = new Ammo.btVector3( 0, 0, 0 );
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- physicsShape.calculateLocalInertia( mass, localInertia );
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-
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- var rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, physicsShape, localInertia );
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- var body = new Ammo.btRigidBody( rbInfo );
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-
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- body.setFriction( 0.5 );
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-
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- if ( vel ) {
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- body.setLinearVelocity( new Ammo.btVector3( vel.x, vel.y, vel.z ) );
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- }
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- if ( angVel ) {
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- body.setAngularVelocity( new Ammo.btVector3( angVel.x, angVel.y, angVel.z ) );
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- }
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-
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- object.userData.physicsBody = body;
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- object.userData.collided = false;
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-
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- scene.add( object );
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-
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- if ( mass > 0 ) {
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- rigidBodies.push( object );
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-
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- // Disable deactivation
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- body.setActivationState( 4 );
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- }
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-
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- physicsWorld.addRigidBody( body );
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-
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- return body;
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- }
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-
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- function createRandomColor() {
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- return Math.floor( Math.random() * ( 1 << 24 ) );
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- }
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-
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- function createMaterial( color ) {
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- color = color || createRandomColor();
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- return new THREE.MeshPhongMaterial( { color: color } );
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- }
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-
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- function initInput() {
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-
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- window.addEventListener( 'mousedown', function( event ) {
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-
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- mouseCoords.set(
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- ( event.clientX / window.innerWidth ) * 2 - 1,
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- - ( event.clientY / window.innerHeight ) * 2 + 1
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- );
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-
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- raycaster.setFromCamera( mouseCoords, camera );
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-
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- // Creates a ball and throws it
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- var ballMass = 35;
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- var ballRadius = 0.4;
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-
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- var ball = new THREE.Mesh( new THREE.SphereBufferGeometry( ballRadius, 14, 10 ), ballMaterial );
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- ball.castShadow = true;
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- ball.receiveShadow = true;
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- var ballShape = new Ammo.btSphereShape( ballRadius );
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- ballShape.setMargin( margin );
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- pos.copy( raycaster.ray.direction );
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- pos.add( raycaster.ray.origin );
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- quat.set( 0, 0, 0, 1 );
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- var ballBody = createRigidBody( ball, ballShape, ballMass, pos, quat );
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-
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- pos.copy( raycaster.ray.direction );
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- pos.multiplyScalar( 24 );
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- ballBody.setLinearVelocity( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
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-
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- }, false );
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-
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- }
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-
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- function onWindowResize() {
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-
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- camera.aspect = window.innerWidth / window.innerHeight;
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- camera.updateProjectionMatrix();
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-
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- renderer.setSize( window.innerWidth, window.innerHeight );
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-
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- }
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-
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- function animate() {
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-
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- requestAnimationFrame( animate );
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-
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- render();
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- stats.update();
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-
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- }
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-
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- function render() {
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-
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- var deltaTime = clock.getDelta();
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-
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- updatePhysics( deltaTime );
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-
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- renderer.render( scene, camera );
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-
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- time += deltaTime;
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-
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- }
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-
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- function updatePhysics( deltaTime ) {
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-
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- // Step world
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- physicsWorld.stepSimulation( deltaTime, 10 );
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-
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- // Update rigid bodies
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- for ( var i = 0, il = rigidBodies.length; i < il; i++ ) {
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- var objThree = rigidBodies[ i ];
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- var objPhys = objThree.userData.physicsBody;
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- var ms = objPhys.getMotionState();
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- if ( ms ) {
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-
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- ms.getWorldTransform( transformAux1 );
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- var p = transformAux1.getOrigin();
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- var q = transformAux1.getRotation();
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- objThree.position.set( p.x(), p.y(), p.z() );
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- objThree.quaternion.set( q.x(), q.y(), q.z(), q.w() );
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-
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- objThree.userData.collided = false;
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-
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- }
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- }
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-
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- for ( var i = 0, il = dispatcher.getNumManifolds(); i < il; i ++ ) {
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-
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- var contactManifold = dispatcher.getManifoldByIndexInternal( i );
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- var rb0 = contactManifold.getBody0();
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|
- var rb1 = contactManifold.getBody1();
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-
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- var threeObject0 = Ammo.castObject( rb0.getUserPointer(), Ammo.btVector3 ).threeObject;
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|
- var threeObject1 = Ammo.castObject( rb1.getUserPointer(), Ammo.btVector3 ).threeObject;
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-
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- if ( ! threeObject0 && ! threeObject1 ) {
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|
- continue;
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|
|
- }
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|
-
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|
- var userData0 = threeObject0 ? threeObject0.userData : null;
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|
- var userData1 = threeObject1 ? threeObject1.userData : null;
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|
|
-
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- var breakable0 = userData0 ? userData0.breakable : false;
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|
|
- var breakable1 = userData1 ? userData1.breakable : false;
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|
|
-
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|
|
- var collided0 = userData0 ? userData0.collided : false;
|
|
|
- var collided1 = userData1 ? userData1.collided : false;
|
|
|
-
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|
|
- if ( ( ! breakable0 && ! breakable1 ) || ( collided0 && collided1 ) ) {
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- var contact = false;
|
|
|
- var maxImpulse = 0;
|
|
|
- for ( var j = 0, jl = contactManifold.getNumContacts(); j < jl; j ++ ) {
|
|
|
- var contactPoint = contactManifold.getContactPoint( j );
|
|
|
- if ( contactPoint.getDistance() < 0 ) {
|
|
|
- contact = true;
|
|
|
- var impulse = contactPoint.getAppliedImpulse();
|
|
|
- if ( impulse > maxImpulse ) {
|
|
|
- maxImpulse = impulse;
|
|
|
- var pos = contactPoint.get_m_positionWorldOnB();
|
|
|
- var normal = contactPoint.get_m_normalWorldOnB();
|
|
|
- impactPoint.set( pos.x(), pos.y(), pos.z() );
|
|
|
- impactNormal.set( normal.x(), normal.y(), normal.z() );
|
|
|
- }
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // If no point has contact, abort
|
|
|
- if ( ! contact ) {
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- // Subdivision
|
|
|
-
|
|
|
- var fractureImpulse = 250;
|
|
|
-
|
|
|
- if ( breakable0 && !collided0 && maxImpulse > fractureImpulse ) {
|
|
|
-
|
|
|
- var debris = convexBreaker.subdivideByImpact( threeObject0, impactPoint, impactNormal , 1, 2, 1.5 );
|
|
|
-
|
|
|
- var numObjects = debris.length;
|
|
|
- for ( var j = 0; j < numObjects; j++ ) {
|
|
|
-
|
|
|
- createDebrisFromBreakableObject( debris[ j ] );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- objectsToRemove[ numObjectsToRemove++ ] = threeObject0;
|
|
|
- userData0.collided = true;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- if ( breakable1 && !collided1 && maxImpulse > fractureImpulse ) {
|
|
|
-
|
|
|
- var debris = convexBreaker.subdivideByImpact( threeObject1, impactPoint, impactNormal , 1, 2, 1.5 );
|
|
|
-
|
|
|
- var numObjects = debris.length;
|
|
|
- for ( var j = 0; j < numObjects; j++ ) {
|
|
|
-
|
|
|
- createDebrisFromBreakableObject( debris[ j ] );
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- objectsToRemove[ numObjectsToRemove++ ] = threeObject1;
|
|
|
- userData1.collided = true;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- for ( var i = 0; i < numObjectsToRemove; i++ ) {
|
|
|
-
|
|
|
- removeDebris( objectsToRemove[ i ] );
|
|
|
-
|
|
|
- }
|
|
|
- numObjectsToRemove = 0;
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- </script>
|
|
|
-
|
|
|
- </body>
|
|
|
-</html>
|
yomboprime