function to damp movement

three_js_damping.js

const parameters = {
    radius: 1.0,
    moveSpeed: 0.01,
    damping: 0.1,
    tilt: 10,
}

const raycaster = new THREE.Raycaster()
const mouse = new THREE.Vector2()

const origin = new THREE.Vector3()
let velocity = new THREE.Vector3()

    // inside the tick:

    raycaster.setFromCamera(mouse, camera)
    // Ray direction vector
    const ray = raycaster.ray.direction
    // Calculate the displacement vector between the cube and the final location
    const xDelta = camera.position.clone()
                                  .add( ray.normalize() )
                                  .sub( origin )
                                  .normalize()
                                  .multiplyScalar( parameters.radius )
                                  .sub( cube.position )
    // Note: cube is always trapped inside an invisible sphere
    // Acceleration from the drag force
    const aDrag = xDelta.clone()
                        .multiplyScalar( parameters.moveSpeed )
    // Acceleration from the damping force
    const aDamp = velocity.clone()
                          .multiplyScalar( parameters.damping )
    // Change the velocity
    velocity = velocity.add( aDrag )
                       .sub( aDamp )
  
    // Move the cube
    cube.position.add( velocity )

    // Tilt the cube
    const {x, y, z} = velocity.clone().multiplyScalar( parameters.tilt )
    cube.rotation.set(-z, x, y)

// Desktop
window.addEventListener('mousemove', (event) => {
    mouse.x = event.clientX / sizes.width * 2 - 1
    mouse.y = - (event.clientY / sizes.height) * 2 + 1
})
// Mobile
window.addEventListener('touchstart', (event) => {
    mouse.x = event.touches[0].clientX / sizes.width * 2 - 1
    mouse.y = - (event.touches[0].clientY / sizes.height) * 2 + 1
})