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transform.position = Vector3.position vibrates

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraSc : MonoBehaviour
{
public float sens;
public Transform body;
public Transform head;
float xRot = 0;
void Start()
{
Cursor.visible = false;
Cursor.lockState = CursorLockMode.Locked;
}
void Update()
{
float x = Input.GetAxisRaw("Mouse X") * sens * Time.deltaTime;
float y = Input.GetAxisRaw("Mouse Y") * sens * Time.deltaTime;
xRot -= y;
xRot = Mathf.Clamp(xRot,-80f,80f);
transform.localRotation = Quaternion.Euler(xRot,0f,0f);
body.Rotate(Vector3.up, x);
transform.position = head.position;
//transform.rotation = head.rotation;
}
}
I have a body and I want my camera to follow my head. it follows of course but it vibrates, its like its not moving , its teleporting to head every second. I tried using FixedUpdate but it was worse. I tried Lerp too but lerp makes camera follow slow, when I move my mouse quick it takes a lot of time to follow.

If you don't need any acceleration or advanced movement for your camera, you can simply make your camera gameobject a child of your head gameobject in the scene hierarchy (or prefab). This will make your camera copy the position and rotation of the head gameobject without any coding.
If you wish to make it third person view, you can simply modify the child position which will always be local to the parent's one.
Hopefully this helps.

It's can be complex problem. Maybe one of these solutions can help.
Why you use Input.GetAxisRaw() - this function return value without smoothing filtering, try Input.GetAxis() as alternative.
"Vibration" effect can be if camera position updates later than your body position. Try setup position for you body object in LateUpdate().
Problem can be in rotation calculation, in your case euler angles will be enough. Try to use something like this:
public float sens = 100.0f;
public float minY = -45.0f;
public float maxY = 45.0f;
private float rotationY = 0.0f;
private float rotationX = 0.0f;
private void Update()
{
rotationX += Input.GetAxis("Mouse X") * sens * Time.deltaTime;
rotationY += Input.GetAxis("Mouse Y") * sens * Time.deltaTime;
rotationY = Mathf.Clamp(rotationY, minY, maxY);
transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
}

How to track transform.position in real time?

I'm working on a little 2d game where you control a planet to dodge incoming asteroids. I'm implementing gravity in the following manner:
public class Gravity : MonoBehaviour
{
Rigidbody2D rb;
Vector2 lookDirection;
float lookAngle;
[Header ("Gravity")]
// Distance where gravity works
[Range(0.0f, 1000.0f)]
public float maxGravDist = 150.0f;
// Gravity force
[Range(0.0f, 1000.0f)]
public float maxGravity = 150.0f;
// Your planet
public GameObject planet;
void Start()
{
rb = GetComponent<Rigidbody2D>();
}
void Update()
{
// Distance to the planet
float dist = Vector3.Distance(planet.transform.position, transform.position);
// Gravity
Vector3 v = planet.transform.position - transform.position;
rb.AddForce(v.normalized * (1.0f - dist / maxGravDist) * maxGravity);
// Rotating to the planet
lookDirection = planet.transform.position - transform.position;
lookAngle = Mathf.Atan2(lookDirection.y, lookDirection.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.Euler(0f, 0f, lookAngle);
}
}
The problem is that the asteroids are attracted to the initial spawn point of the planet (0,0), it doesn't update in real time with the movement of the planet. So if I move the planet to the corner of the screen, the asteroids are still attracted to the centre of it.
Is there a way to solve this?
Thank you very much and excuse any flagrant errors!

There are 2 ways to get to an object with speed:
get the object to the player and in each update just use the planet.transform.position
using look at first to rotate to the plant and then using vector3.forword as the direction of the movement.
The first solution doesn't work for you so you might want to try the second one.
any way, if your lookAt part doesn't work too you can use
Vector3 dir = target.position - transform.position;
float angle = Mathf.Atan2(dir.y,dir.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
or
Vector3 targetPos = target.transform.position;
Vector3 targetPosFlattened = new Vector3(targetPos.x, targetPos.y, 0);
transform.LookAt(targetPosFlattened);

When I hit play, my Sprite character rotates. Why?

I am making a top down game on Unity, so I am using the x and z axis as my plane. I have my character rotated x 90, y 0, z 0 so that it is flat on the plane. As soon as I hit play the character is rotated vertical?! I think it has something to do with my script to face the mouse position.
What it should look like:
When I hit play:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerMovement : MonoBehaviour
{
public static float moveSpeed = 10f;
private Rigidbody rb;
private Vector3 moveInput;
private Vector3 moveVelocity;
// Update is called once per frame
void Start()
{
rb = GetComponent<Rigidbody>();
mainCamera = FindObjectOfType<Camera>();
}
void Update()
{
// Setting up movement along x and z axis. (Top Down Shooter)
moveInput = new Vector3(Input.GetAxis("Horizontal"), 0f, Input.GetAxis("Vertical"));
moveVelocity = moveInput * moveSpeed;
//Make character look at mouse.
var dir = Input.mousePosition - Camera.main.WorldToScreenPoint(transform.position);
var angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.AngleAxis(angle, Vector3.up);
}
void FixedUpdate()
{
// Allows character to move.
rb.velocity = moveVelocity;
}
}

Figured it out: I am answering my own question to help others.
Vector3 difference = Input.mousePosition - Camera.main.WorldToScreenPoint(transform.position);
float rotZ = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.Euler(90f, 0f, rotZ -90);
This does EXACTLY what I wanted!

unity 3d rotate object (space.self) toward player

i need your help please.
i want an object to rotate in Y axis (space.self) toward the player position.
i have already tried this code, it works but i think there is a bug in it because the object keep changing position slowly.
public Transform _Playertrs;
public float RotationSpeed = 10f;
private Quaternion _LookRotation;
private Vector3 _direction;
private bool Patroling = true;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
_direction = (_Playertrs.position - transform.position).normalized;
_LookRotation = Quaternion.LookRotation(_direction);
transform.rotation = Quaternion.Slerp(transform.rotation, _LookRotation, Time.deltaTime * RotationSpeed);
}
thank you guys for your answers, the rotation is working perfectly now, but the problem is the object keep moving from its position even that i don't have any movement code, watch the video to understand pls
https://www.youtube.com/watch?v=Gys5xYQ5psw&feature=youtu.be

If you want it to be instantaneous, replace
transform.rotation = Quaternion.Slerp(transform.rotation, _LookRotation, Time.deltaTime * RotationSpeed);
by
transform.rotation = _LookRotation;
The Slerp function gives an intermediate point between the to rotation to make a smooth effect.

Here, this is taken from the Unity Quaternion.LookRotation() official documentation, you can just simply apply the Quaternion that you have _LookRotation and apply it to your desired transform.rotation as such transform.rotation = _LookRotation;
using UnityEngine;
using System.Collections;
public class ExampleClass : MonoBehaviour
{
public Transform target;
void Update() {
Vector3 relativePos = target.position - transform.position;
Quaternion rotation = Quaternion.LookRotation(relativePos);
transform.rotation = rotation;
}
}

How to automatically rotate turrets towards enemy direction continously?

I have a turret placed as a game-object ,i have set the target as enemy in inspector,but somehow the turrets just point towards my enemy but are not continuously rotating on z axis.what is the problem,any help thanx...!!
Here is my code
using UnityEngine;
using System.Collections;
public class TurretScript: MonoBehaviour
{
public Transform target;
void Update()
{
Vector3 tarPos = new Vector3(target.position.x, target.position.y, 10);
Vector3 lookPos = Camera.main.ScreenToWorldPoint(tarPos);
lookPos = lookPos - transform.position;
float angle = Mathf.Atan2(lookPos.y, lookPos.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
}
}

Easiest way to achieve this? Cheat! Something like this:
public class TurretScript: MonoBehaviour
{
//values that will be set in the Inspector
public Transform Target;
public float RotationSpeed;
void Update()
{
var direction = Target.transform.position - transform.position;
// Set Y the same to make the rotations turret-like:
direction.y = transform.position.y;
var rot = Quaternion.LookRotation(direction, Vector3.up);
transform.rotation = Quaternion.RotateTowards(
transform.rotation,
rot,
RotationSpeed * Time.deltaTime);
}
}

You can also use Transform.LookAt() from the Documentation
I find this to be the simplest approach without the headache of computing rotations.