Javascript 3D Create Mask Ball

createMaskBall.js

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);
}