First Person Camera

First person mouse look camera with sensitivity, vertical clamp, and cursor lock. Plug into any FPS or exploration game.

Unity 2022.3+ · 2.4 KB · FirstPersonCamera.cs

How to Use

Create your Player object with a child Camera

Attach FirstPersonCamera to the Camera

Adjust mouse sensitivity and vertical clamp angles

Cursor locks automatically on Start

Press Escape to toggle cursor lock

Pair with 3D Player Controller for complete FPS movement

Source Code

  
 FirstPersonCamera.cs
C# 
using UnityEngine;

/// <summary>
/// First person mouse look camera. Attach to the Camera (child of player).
/// Handles horizontal rotation on the player body and vertical rotation on the camera.
/// </summary>
public class FirstPersonCamera : MonoBehaviour
{
    [Header("Sensitivity")]
    [SerializeField] private float mouseSensitivity = 2f;
    [SerializeField] private float smoothing = 1.5f;

    [Header("Vertical Clamp")]
    [SerializeField] private float minVerticalAngle = -90f;
    [SerializeField] private float maxVerticalAngle = 90f;

    [Header("Cursor")]
    [SerializeField] private bool lockCursorOnStart = true;

    private Transform playerBody;
    private float xRotation;
    private float yRotation;
    private Vector2 currentMouseDelta;
    private Vector2 currentMouseDeltaVelocity;

    private void Awake()
    {
        playerBody = transform.parent;
    }

    private void Start()
    {
        if (lockCursorOnStart)
        {
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
        }
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            bool locked = Cursor.lockState == CursorLockMode.Locked;
            Cursor.lockState = locked ? CursorLockMode.None : CursorLockMode.Locked;
            Cursor.visible = locked;
        }

        if (Cursor.lockState != CursorLockMode.Locked) return;

        Vector2 targetMouseDelta = new Vector2(
            Input.GetAxisRaw("Mouse X"),
            Input.GetAxisRaw("Mouse Y")
        );

        currentMouseDelta = Vector2.SmoothDamp(
            currentMouseDelta, targetMouseDelta,
            ref currentMouseDeltaVelocity, 1f / smoothing
        );

        xRotation -= currentMouseDelta.y * mouseSensitivity;
        xRotation = Mathf.Clamp(xRotation, minVerticalAngle, maxVerticalAngle);

        yRotation += currentMouseDelta.x * mouseSensitivity;

        transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);

        if (playerBody != null)
            playerBody.rotation = Quaternion.Euler(0f, yRotation, 0f);
    }

    /// <summary>
    /// Add recoil to the camera (e.g., from weapon fire).
    /// </summary>
    public void AddRecoil(float vertical, float horizontal)
    {
        xRotation -= vertical;
        yRotation += horizontal;
    }
}
 80 lines

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