wonglok/index.html

## index.html
<html>
    <head>
        <meta charset="utf-8">
        <title>JS 3D Physics</title>
        <style>
            body { margin: 0; }
        </style>
    </head>
    <body>
        <script src="js/three.js"></script>
        <script src="js/ammo.js"></script>
        <script>

            //variable declaration section
            let physicsWorld, scene, camera, renderer, rigidBodies = [];
            let colGroupPlane = 1, colGroupRedBall = 2, colGroupGreenBall = 4

            //Ammojs Initialization
            Ammo().then(start)

            function start (){

                tmpTrans = new Ammo.btTransform();

                setupPhysicsWorld();

                setupGraphics();
                createBlock();
                createBall();
                createMaskBall();

                renderFrame();

            }

            function setupPhysicsWorld(){

                let collisionConfiguration  = new Ammo.btDefaultCollisionConfiguration(),
                    dispatcher              = new Ammo.btCollisionDispatcher(collisionConfiguration),
                    overlappingPairCache    = new Ammo.btDbvtBroadphase(),
                    solver                  = new Ammo.btSequentialImpulseConstraintSolver();

                physicsWorld           = new Ammo.btDiscreteDynamicsWorld(dispatcher, overlappingPairCache, solver, collisionConfiguration);
                physicsWorld.setGravity(new Ammo.btVector3(0, -10, 0));

            }


            function setupGraphics(){

                //create clock for timing
                clock = new THREE.Clock();

                //create the scene
                scene = new THREE.Scene();
                scene.background = new THREE.Color( 0xbfd1e5 );

                //create camera
                camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.2, 5000 );
                camera.position.set( 0, 30, 70 );
                camera.lookAt(new THREE.Vector3(0, 0, 0));

                //Add hemisphere light
                let hemiLight = new THREE.HemisphereLight( 0xffffff, 0xffffff, 0.1 );
                hemiLight.color.setHSL( 0.6, 0.6, 0.6 );
                hemiLight.groundColor.setHSL( 0.1, 1, 0.4 );
                hemiLight.position.set( 0, 50, 0 );
                scene.add( hemiLight );

                //Add directional light
                let dirLight = new THREE.DirectionalLight( 0xffffff , 1);
                dirLight.color.setHSL( 0.1, 1, 0.95 );
                dirLight.position.set( -1, 1.75, 1 );
                dirLight.position.multiplyScalar( 100 );
                scene.add( dirLight );

                dirLight.castShadow = true;

                dirLight.shadow.mapSize.width = 2048;
                dirLight.shadow.mapSize.height = 2048;

                let d = 50;

                dirLight.shadow.camera.left = -d;
                dirLight.shadow.camera.right = d;
                dirLight.shadow.camera.top = d;
                dirLight.shadow.camera.bottom = -d;

                dirLight.shadow.camera.far = 13500;

                //Setup the renderer
                renderer = new THREE.WebGLRenderer( { antialias: true } );
                renderer.setClearColor( 0xbfd1e5 );
                renderer.setPixelRatio( window.devicePixelRatio );
                renderer.setSize( window.innerWidth, window.innerHeight );
                document.body.appendChild( renderer.domElement );

                renderer.gammaInput = true;
                renderer.gammaOutput = true;

                renderer.shadowMap.enabled = true;

            }


            function renderFrame(){

                let deltaTime = clock.getDelta();

                updatePhysics( deltaTime );

                renderer.render( scene, camera );

                requestAnimationFrame( renderFrame );

            }


            function createBlock(){

                let pos = {x: 0, y: 0, z: 0};
                let scale = {x: 50, y: 2, z: 50};
                let quat = {x: 0, y: 0, z: 0, w: 1};
                let mass = 0;

                //threeJS Section
                let blockPlane = new THREE.Mesh(new THREE.BoxBufferGeometry(), new THREE.MeshPhongMaterial({color: 0xa0afa4}));

                blockPlane.position.set(pos.x, pos.y, pos.z);
                blockPlane.scale.set(scale.x, scale.y, scale.z);

                blockPlane.castShadow = true;
                blockPlane.receiveShadow = true;

                scene.add(blockPlane);


                //Ammojs Section
                let transform = new Ammo.btTransform();
                transform.setIdentity();
                transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
                transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
                let motionState = new Ammo.btDefaultMotionState( transform );

                let colShape = new Ammo.btBoxShape( new Ammo.btVector3( scale.x * 0.5, scale.y * 0.5, scale.z * 0.5 ) );
                colShape.setMargin( 0.05 );

                let localInertia = new Ammo.btVector3( 0, 0, 0 );
                colShape.calculateLocalInertia( mass, localInertia );

                let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colShape, localInertia );
                let body = new Ammo.btRigidBody( rbInfo );


                physicsWorld.addRigidBody( body, colGroupPlane, colGroupRedBall );
            }


            function createBall(){

                let pos = {x: 0, y: 20, z: 0};
                let radius = 2;
                let quat = {x: 0, y: 0, z: 0, w: 1};
                let mass = 1;

                //threeJS Section
                let ball = new THREE.Mesh(new THREE.SphereBufferGeometry(radius), new THREE.MeshPhongMaterial({color: 0xff0505}));

                ball.position.set(pos.x, pos.y, pos.z);

                ball.castShadow = true;
                ball.receiveShadow = true;

                scene.add(ball);


                //Ammojs Section
                let transform = new Ammo.btTransform();
                transform.setIdentity();
                transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
                transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
                let motionState = new Ammo.btDefaultMotionState( transform );

                let colShape = new Ammo.btSphereShape( radius );
                colShape.setMargin( 0.05 );

                let localInertia = new Ammo.btVector3( 0, 0, 0 );
                colShape.calculateLocalInertia( mass, localInertia );

                let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colShape, localInertia );
                let body = new Ammo.btRigidBody( rbInfo );


                physicsWorld.addRigidBody( body, colGroupRedBall, colGroupPlane | colGroupGreenBall );

                ball.userData.physicsBody = body;
                rigidBodies.push(ball);
            }


            function createMaskBall(){

                let pos = {x: 1, y: 30, z: 0};
                let radius = 2;
                let quat = {x: 0, y: 0, z: 0, w: 1};
                let mass = 1;

                //threeJS Section
                let ball = new THREE.Mesh(new THREE.SphereBufferGeometry(radius), new THREE.MeshPhongMaterial({color: 0x00ff08}));

                ball.position.set(pos.x, pos.y, pos.z);

                ball.castShadow = true;
                ball.receiveShadow = true;

                scene.add(ball);


                //Ammojs Section
                let transform = new Ammo.btTransform();
                transform.setIdentity();
                transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
                transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
                let motionState = new Ammo.btDefaultMotionState( transform );

                let colShape = new Ammo.btSphereShape( radius );
                colShape.setMargin( 0.05 );

                let localInertia = new Ammo.btVector3( 0, 0, 0 );
                colShape.calculateLocalInertia( mass, localInertia );

                let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colShape, localInertia );
                let body = new Ammo.btRigidBody( rbInfo );


                physicsWorld.addRigidBody( body, colGroupGreenBall, colGroupRedBall);

                ball.userData.physicsBody = body;
                rigidBodies.push(ball);
            }


            function updatePhysics( deltaTime ){

                // Step world
                physicsWorld.stepSimulation( deltaTime, 10 );

                // Update rigid bodies
                for ( let i = 0; i < rigidBodies.length; i++ ) {
                    let objThree = rigidBodies[ i ];
                    let objAmmo = objThree.userData.physicsBody;
                    let ms = objAmmo.getMotionState();
                    if ( ms ) {

                        ms.getWorldTransform( tmpTrans );
                        let p = tmpTrans.getOrigin();
                        let q = tmpTrans.getRotation();
                        objThree.position.set( p.x(), p.y(), p.z() );
                        objThree.quaternion.set( q.x(), q.y(), q.z(), q.w() );

                    }
                }

            }


        </script>
    </body>
</html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>JS 3D Physics</title>
	<style>
	body { margin: 0; }
	</style>
	</head>
	<body>
	<script src="js/three.js"></script>
	<script src="js/ammo.js"></script>
	<script>

	//variable declaration section
	let physicsWorld, scene, camera, renderer, rigidBodies = [];
	let colGroupPlane = 1, colGroupRedBall = 2, colGroupGreenBall = 4

	//Ammojs Initialization
	Ammo().then(start)

	function start (){

	tmpTrans = new Ammo.btTransform();

	setupPhysicsWorld();

	setupGraphics();
	createBlock();
	createBall();
	createMaskBall();

	renderFrame();

	}

	function setupPhysicsWorld(){

	let collisionConfiguration = new Ammo.btDefaultCollisionConfiguration(),
	dispatcher = new Ammo.btCollisionDispatcher(collisionConfiguration),
	overlappingPairCache = new Ammo.btDbvtBroadphase(),
	solver = new Ammo.btSequentialImpulseConstraintSolver();

	physicsWorld = new Ammo.btDiscreteDynamicsWorld(dispatcher, overlappingPairCache, solver, collisionConfiguration);
	physicsWorld.setGravity(new Ammo.btVector3(0, -10, 0));

	}


	function setupGraphics(){

	//create clock for timing
	clock = new THREE.Clock();

	//create the scene
	scene = new THREE.Scene();
	scene.background = new THREE.Color( 0xbfd1e5 );

	//create camera
	camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.2, 5000 );
	camera.position.set( 0, 30, 70 );
	camera.lookAt(new THREE.Vector3(0, 0, 0));

	//Add hemisphere light
	let hemiLight = new THREE.HemisphereLight( 0xffffff, 0xffffff, 0.1 );
	hemiLight.color.setHSL( 0.6, 0.6, 0.6 );
	hemiLight.groundColor.setHSL( 0.1, 1, 0.4 );
	hemiLight.position.set( 0, 50, 0 );
	scene.add( hemiLight );

	//Add directional light
	let dirLight = new THREE.DirectionalLight( 0xffffff , 1);
	dirLight.color.setHSL( 0.1, 1, 0.95 );
	dirLight.position.set( -1, 1.75, 1 );
	dirLight.position.multiplyScalar( 100 );
	scene.add( dirLight );

	dirLight.castShadow = true;

	dirLight.shadow.mapSize.width = 2048;
	dirLight.shadow.mapSize.height = 2048;

	let d = 50;

	dirLight.shadow.camera.left = -d;
	dirLight.shadow.camera.right = d;
	dirLight.shadow.camera.top = d;
	dirLight.shadow.camera.bottom = -d;

	dirLight.shadow.camera.far = 13500;

	//Setup the renderer
	renderer = new THREE.WebGLRenderer( { antialias: true } );
	renderer.setClearColor( 0xbfd1e5 );
	renderer.setPixelRatio( window.devicePixelRatio );
	renderer.setSize( window.innerWidth, window.innerHeight );
	document.body.appendChild( renderer.domElement );

	renderer.gammaInput = true;
	renderer.gammaOutput = true;

	renderer.shadowMap.enabled = true;

	}


	function renderFrame(){

	let deltaTime = clock.getDelta();

	updatePhysics( deltaTime );

	renderer.render( scene, camera );

	requestAnimationFrame( renderFrame );

	}


	function createBlock(){

	let pos = {x: 0, y: 0, z: 0};
	let scale = {x: 50, y: 2, z: 50};
	let quat = {x: 0, y: 0, z: 0, w: 1};
	let mass = 0;

	//threeJS Section
	let blockPlane = new THREE.Mesh(new THREE.BoxBufferGeometry(), new THREE.MeshPhongMaterial({color: 0xa0afa4}));

	blockPlane.position.set(pos.x, pos.y, pos.z);
	blockPlane.scale.set(scale.x, scale.y, scale.z);

	blockPlane.castShadow = true;
	blockPlane.receiveShadow = true;

	scene.add(blockPlane);


	//Ammojs Section
	let transform = new Ammo.btTransform();
	transform.setIdentity();
	transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
	transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
	let motionState = new Ammo.btDefaultMotionState( transform );

	let colShape = new Ammo.btBoxShape( new Ammo.btVector3( scale.x * 0.5, scale.y * 0.5, scale.z * 0.5 ) );
	colShape.setMargin( 0.05 );

	let localInertia = new Ammo.btVector3( 0, 0, 0 );
	colShape.calculateLocalInertia( mass, localInertia );

	let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colShape, localInertia );
	let body = new Ammo.btRigidBody( rbInfo );


	physicsWorld.addRigidBody( body, colGroupPlane, colGroupRedBall );
	}


	function createBall(){

	let pos = {x: 0, y: 20, z: 0};
	let radius = 2;
	let quat = {x: 0, y: 0, z: 0, w: 1};
	let mass = 1;

	//threeJS Section
	let ball = new THREE.Mesh(new THREE.SphereBufferGeometry(radius), new THREE.MeshPhongMaterial({color: 0xff0505}));

	ball.position.set(pos.x, pos.y, pos.z);

	ball.castShadow = true;
	ball.receiveShadow = true;

	scene.add(ball);


	//Ammojs Section
	let transform = new Ammo.btTransform();
	transform.setIdentity();
	transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
	transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
	let motionState = new Ammo.btDefaultMotionState( transform );

	let colShape = new Ammo.btSphereShape( radius );
	colShape.setMargin( 0.05 );

	let localInertia = new Ammo.btVector3( 0, 0, 0 );
	colShape.calculateLocalInertia( mass, localInertia );

	let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colShape, localInertia );
	let body = new Ammo.btRigidBody( rbInfo );


	physicsWorld.addRigidBody( body, colGroupRedBall, colGroupPlane \| colGroupGreenBall );

	ball.userData.physicsBody = body;
	rigidBodies.push(ball);
	}



	function createMaskBall(){

	let pos = {x: 1, y: 30, z: 0};
	let radius = 2;
	let quat = {x: 0, y: 0, z: 0, w: 1};
	let mass = 1;

	//threeJS Section
	let ball = new THREE.Mesh(new THREE.SphereBufferGeometry(radius), new THREE.MeshPhongMaterial({color: 0x00ff08}));

	ball.position.set(pos.x, pos.y, pos.z);

	ball.castShadow = true;
	ball.receiveShadow = true;

	scene.add(ball);


	//Ammojs Section
	let transform = new Ammo.btTransform();
	transform.setIdentity();
	transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
	transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
	let motionState = new Ammo.btDefaultMotionState( transform );

	let colShape = new Ammo.btSphereShape( radius );
	colShape.setMargin( 0.05 );

	let localInertia = new Ammo.btVector3( 0, 0, 0 );
	colShape.calculateLocalInertia( mass, localInertia );

	let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colShape, localInertia );
	let body = new Ammo.btRigidBody( rbInfo );


	physicsWorld.addRigidBody( body, colGroupGreenBall, colGroupRedBall);

	ball.userData.physicsBody = body;
	rigidBodies.push(ball);
	}


	function updatePhysics( deltaTime ){

	// Step world
	physicsWorld.stepSimulation( deltaTime, 10 );

	// Update rigid bodies
	for ( let i = 0; i < rigidBodies.length; i++ ) {
	let objThree = rigidBodies[ i ];
	let objAmmo = objThree.userData.physicsBody;
	let ms = objAmmo.getMotionState();
	if ( ms ) {

	ms.getWorldTransform( tmpTrans );
	let p = tmpTrans.getOrigin();
	let q = tmpTrans.getRotation();
	objThree.position.set( p.x(), p.y(), p.z() );
	objThree.quaternion.set( q.x(), q.y(), q.z(), q.w() );

	}
	}

	}


	</script>
	</body>
	</html>