Develop Reference

Character randomly rotating on the X and Z axes even thought Rigidbody constraints are enabled

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UIElements;
class FirstPersonCamera : MonoBehaviour
{
public float mouseSensitivity = 100f;
public Transform playerTransform;
public Transform weaponTransform;
private float xRotation = 0;
void Start()
{
UnityEngine.Cursor.lockState = CursorLockMode.Locked; //Hides the cursor and locks it to the center
}
void Update()
{
float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;
xRotation -= mouseY;
xRotation = Mathf.Clamp(xRotation, -90, 90);
transform.localRotation = Quaternion.Euler(xRotation, 0, 0);
weaponTransform.localRotation = Quaternion.Euler(xRotation, 0, 0);
playerTransform.Rotate(new Vector3(0.0f, mouseX, 0.0f));
//playerTransform.gameObject.GetComponent<Rigidbody>().MoveRotation(Quaternion.Euler(0.0f,mouseX,0.0f));
if (Input.GetKeyDown(KeyCode.Escape))
{
UnityEngine.Cursor.lockState = CursorLockMode.None;
}
}
}
This is what I'm using for player looking (mouse controls) and this keeps happening:
even though I have rigidbody X and Z rotations locked. The issue mainly seems to arise when using keyboard controls and mouse together. Here is the playerMove code as well: https://codeshare.io/wnzrYj . It shouldn't be doing anything with rotation.
I've tried removing the playerTransform.Rotate and the issue seems to disappear. I've also tried rotating the gameObject via the rigidbody but that doesn't seem to rotate the body at all.

You're causing the rotations yourself. You've added the xRotation, which will affect the pitch, but then you use Transform.Rotate, which works locally. That means that when pitched, your Rotate is no longer around the world's Y axis, but rather around the object's pitched Y-axis, adding rotation to axes you don't want.
The easiest way to solve this is to build your hierarchy properly to make sure that the rotations are applied in the order you want. I usually go with something like:
Root -> YawPivot -> Body -> PitchPivot -> Head/Camera
The Root object would have the translations (offsets/movement) applied to it. The YawPivot is only rotated around the Y axis. And the PitchPivot is only rotated around the X axis (and is usually located around the neck or head area).

Is there a simple way of creating a spring-like camera rotation out of this script? (Unity C#)

This is the script im using. This is the result im looking for
ex: https://imgur.com/a/1L2wV52
void Update()
{
float mouseX = Input.GetAxisRaw("Mouse X") * Time.fixedDeltaTime * _sensitivityX;
float mouseY = Input.GetAxisRaw("Mouse Y") * Time.fixedDeltaTime * _sensitivityY;
yRotation += mouseX;
xRotation -= mouseY;
xRotation = Mathf.Clamp(xRotation, -90f, 90f);
camHolder.rotation = Quaternion.Euler(xRotation, yRotation, 0);
orientation.rotation = Quaternion.Euler(0, yRotation, 0);
}
The result doesn't have to be exact but somewhat similar, I have tried using lerp but it didn't quite work.. If you have any answers to this, I would really appreciate it, thanks!

To achieve this effect you want to calculate the target rotation from the mouse input and then increase / decrease the rotation of the camera based on it. But you can not dirrectly link the mouse movement to the camera as you did, because it will not look smooth. You have to do rotate it over multiple frames.
You also need to set a maximum delta between last frame cam angle and current frame cam angle.
If you also want to have an overshooting effect, then adding a velocity to the camera movement is the best solution in my opinion.

Unity 3D first person movement

I'm following brackeys 1st person movement tutorial. but I can't get the camera working.
I followed the tutorial correctly, But this code isn't working. gives no errors but it doesn't work. here's the code
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MouseLook : MonoBehaviour
{
public float mouseSensitivity = 100f;
public Transform playerBody;
float xRotation = 0f;
// Start is called before the first frame update
void Start()
{
Cursor.lockState = CursorLockMode.Locked;
}
// Update is called once per frame
void Update()
{
float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;
xRotation -= mouseY;
xRotation = Mathf.Clamp(xRotation, -90f, 90f);
transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);
playerBody.Rotate(Vector3.up * mouseX);
}
}
This code gives no errors but doesn't work. how can i fix this?

The code you've attached is correct.
I recommend you follow the tutorial once more and pay close attention to where this script should be attached.
Having checked the tutorial myself right now I got it to work by parenting camera as a child of player, attaching MouseLook.cs to Camera game object, and setting player game object as a Player Body variable in MouseLook.cs.I recommend making sure that mouseSensitivity variable is set to 100. Next, if that won't solve your issue, it could mean a number of things.
First, your project can have Axis "Mouse X" and "Mouse Y" unset, meaning that it does not record the movement of your mouse when you move it.
Second, player or camera rotation can be overridden by some other behavior that might cause MouseLook rotation to be ignored.

Aim Assist in Unity?

Well, I'm working on something, but I'm stuck right now. as Title says it's about an "aim assist" for a shooting game. I move my camera using pitch-yaw updated every frame. like this:
void Update()
{
float pitch -= Input.GetAxis("Mouse Y") * sensivity;
float yaw += Input.GetAxis("Mouse X") * sensivity;
Vector2 rot = new Vector2(pitch, yaw);
cam.tranform.eulerAngles = rot;
}
And my AimAssit() method look like this:
void AimAssist(float weaponRange)
{
RaycastHit hit;
if (Physics.SphereCast(cam.transform.position, radiusDetection, cam.transform.forward, out hit, weaponRange, 1 << LayerMask.NameToLayer("Shootable"))
{
GameObject aimTo = hit.transform.gameObject;
Vector3 direction = aimTo.transform.position - cam.transform.position;
cam.transform.rotation = Quaternion.Slerp(cam.transform.rotation, Quaternion.LookRotation(direction), .1f);
}
}
So, The problem is they don't work together, it's a mess. I know one of these work with degrees and the other one use angles, it's confusing. In other words, what I need is snap the crosshair in the head and still move fine with mouse. Thanks in advance.
BTW, I made this, but it was useless:
Vector2 aim = new Vector2(Quaternion.LookRotation(direction).eulerAngles.x, Quaternion.LookRotation(direction).eulerAngles.y);
CamTransform().eulerAngles = currentRotation + (Vector2)aim;
To be clear "direction" is the same from AimAssist().

Camera shaking on rotating player while crouching in unity

I am having a problem with the camera following the player. When the player moves, the camera shakes and this effect is more noticeable when the player is in the crouched position. I am using root motion for the player with animations by mixamo.
Player Script:
Transform cameraT;
void Start () {
cameraT = Camera.main.transform;
}
void FixedUpdate ()
{
float sideMotion = Input.GetAxis("SideMotion");
float straightMotion= Input.GetAxis("StraightMotion");
if (Mathf.Abs(sideMotion) > 0 || Mathf.Abs(straightMotion) > 0)
{
transform.eulerAngles = new Vector3(transform.eulerAngles.x,
cameraT.eulerAngles.y);
}
}
Camera Script:
public float distanceFromPlayer=2f;
public float mouseSensitivity=6;
public Transform player;
public Vector2 pitchConstraint= new Vector2(-30,80);
Vector3 rotationSmoothVelocity;
Vector3 currentRotation;
public float rotationSmoothTime = 0.2f;
float yaw; //Rotation around the vertical axis is called yaw
float pitch; //Rotation around the side-to-side axis is called pitch
private void LateUpdate()
{
yaw += Input.GetAxis("Mouse X") * mouseSensitivity;
pitch -= Input.GetAxis("Mouse Y") * mouseSensitivity;
pitch = Mathf.Clamp(pitch, pitchConstraint.x, pitchConstraint.y);
currentRotation = Vector3.SmoothDamp
(currentRotation, new Vector3(pitch, yaw), ref rotationSmoothVelocity, rotationSmoothTime);
transform.eulerAngles = currentRotation;
transform.position = player.position - transform.forward * distanceFromPlayer;
}
For public transform I just added an empty game object to player chest level and parented it to the player. I got the rotating camera smoothly trick from an online tutorial but that exact thing won't work on player rotation though.
A character controller is attached to player without any rigidbody or collider.

You are going to want to use Lerp on the camera in order to smooth its motion from one position to another. The Scripting API has a good example of Vector3.Lerp.
So in your case, you could add a public variable for smoothing position as well. Something like positionSmoothTime. Then make a "Desired Position" variable, we'll call it destPosition.
Vector3 destPosition = player.position - transform.forward * distanceFromPlayer;
transform.position = Vector3.Lerp(transform.position, destPosition, positionSmoothTime);
This should effectively smooth it to where the stuttering should go away. Another thing that will help that someone else mentioned is using a part of the body that moves less (Like the head) as the target. This combined with the Lerp function will give you a smooth camera movement.
Another large help would be to move things into the Update() function. The reason being is FixedUpdate() doesn't get called every frame. So you could potentially get stutter as a result. If you move everything into Update() it will update every frame and help smooth things out. If you do this though you will need to multiply all movement by Time.deltaTime as shown in the example below.
Vector3 destPosition = (player.position - transform.forward * distanceFromPlayer) * Time.deltaTime;
For more examples, check the links to each function to see Unity's documentation on it. It has examples of everything I've shown here.