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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));

}