Unity - following finger only works for one direction - unity3d

Question

I have made some code that should make my player move into the direction of the finger:
if (Input.touchCount == 1 && Input.GetTouch(0).phase == TouchPhase.Moved)
{
Vector2 pos = Camera.main.ScreenToWorldPoint(new Vector3(Input.GetTouch(0).position.x, Input.GetTouch(0).position.y, 0));
if (pos.x < rb.position.x)
{
movehorizontal = -1;
}
if(pos.x > rb.position.x)
{
movehorizontal = 1;
}
if (pos.y < rb.position.z)
{
movevertical = -1;
}
if(pos.y > rb.position.z)
{
movevertical = 1;
}
}
Vector3 movement = new Vector3(movehorizontal, 0.00f, movevertical)*speed;
It's a 3D game, with a top-view, so my player starts at 0,0,0 and only moves along the x and z axis. My camera is positionated on 0,10,3. The following works on the x axis, so when my finger touches on the right side it goes to the right, if on the left to the left, but no matter where I touch it, it will only move to the front and not to the bottom of my screen.
I tried debugging, but the instructions werent working at the time.

Answer 1

screentoWorldPoint should be stored as a vector3. also since the camera is 10 units away from your plane the last parameter should be 10.
edit, that will only work for a cam pointing straight down. this code should work regardless of the camera angle.
Vector3 pos = Camera.main.ScreenToWorldPoint(new Vector3(Input.GetTouch(0).position.x, Input.GetTouch(0).position.y, 1f));
Vector3 pointDelta = pos - Camera.main.transform.position;
float multiplier = -Camera.main.transform.position.y / pointDelta.y;
pos = Camera.main.transform.position + pointDelta * multiplier;
finally these lines should compare the z values to each other
if (pos.z < rb.position.z)
if(pos.z > rb.position.z)
make those changes and let us know if any other problems still exist