Move object with finger on x-axis 3d - unity3d

Question

I have a question: How can I moce a object on the x-axis with my finger on th smartphone? In the internet I can only find solutions for 2d but non for 3d projects.
I have tried this code, but it is really jerky:
void FixedUpdate()
{
if (Input.touchCount == 1) {
touch = Input.GetTouch(0);
if (touch.phase == TouchPhase.Moved) {
transform.position = new Vector3(
transform.position.x + touch.deltaPosition.x * speedModifier,
transform.position.y,
transform.position.z
);
}
}
transform.position = new Vector3(
transform.position.x,
transform.position.y,
transform.position.z + (speed * Time.fixedDeltaTime)
);
}
The real question is, how can I make this code, that it works smoothly, because it is really unsmoothly at the moment?

Answer 1

If you want to move the player where you are pressing you can use this code that is simpler than yours:
if (Input.touchCount > 0)
{
touch = Input.GetTouch(0);
if (touch.phase == TouchPhase.Moved)
{
transform.position = new Vector3(
transform.position.x,
transform.position.y,
transform.position.z + touch.deltaPosition.x * speed);
}
}
It is very customizable, in this case, for example, I am moving the player along the z-axis , like in your example, but it depends on the position of the finger from left to right.
You can easily change the last part of the code in the way you prefer, for example:
transform.position = new Vector3(
transform.position.x + touch.deltaPosition.x * speed,
transform.position.y + touch.deltaPosition.y * speed,
transform.position.z);
In this way, it will go up and down and left and right, based on the point you press and it could be useful for a game in 2d view. In 3D keep in mind that if you press up you want to move on the z axis most of the time so my first code is working well because I am changing z position on the x touch.