Putting everything in void Update() for a first person controller, how do I make movement smoother?

Unity Engine
1

First my code is here:

https://github.com/Some-T/FirstPersonController-CSharp/blob/master/Assets/Scripts/FirstPersonController.cs

and:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UIElements;
using Cursor = UnityEngine.Cursor;




public class FirstPersonController : MonoBehaviour
{
    private float speed = 5;
    private float jumpPower = 5;
    Rigidbody rb;
    CapsuleCollider col;
    public Camera PlayerCamera;
    public GameObject crossHair;
    bool isActive;
    float HorizontalInput;
    float VerticalInput;
    public GameObject mainPlayer;


    void Start()
    {
        Cursor.visible = false;
        Cursor.lockState = CursorLockMode.Locked;
        rb = GetComponent<Rigidbody>();
        col = GetComponent<CapsuleCollider>();
        crossHair = GameObject.FindWithTag("CrossHair");
        mainPlayer = GameObject.FindWithTag("Player");
    }


    void Update()
    {
        HorizontalInput = Input.GetAxisRaw("Horizontal");
        VerticalInput = Input.GetAxisRaw("Vertical");
        Vector3 xMovement = PlayerCamera.transform.right * HorizontalInput;
        Vector3 zMovement = PlayerCamera.transform.forward * VerticalInput;
        Vector3 velocity = (xMovement + zMovement).normalized * speed;
        Vector3 forward = PlayerCamera.transform.forward;
       
        velocity.y = rb.velocity.y;
        rb.velocity = velocity;
        forward.y = 0;
        forward.Normalize();
        zMovement = forward * VerticalInput;

        if (isGrounded() && Input.GetButtonDown("Jump"))

        {
            rb.velocity = Vector3.zero;
            rb.AddForce(Vector3.up * jumpPower, ForceMode.Impulse);
        }


        if (Input.GetKeyDown("escape"))
        {
            Cursor.lockState = CursorLockMode.None;
        }

        if (Input.GetButtonDown("Sprint"))
        {
            speed = 15;
            Debug.Log("Speed is now: " + speed);
        }

        if (Input.GetButtonUp("Sprint"))
        {
            speed = 5;
            Debug.Log("Speed is now: " + speed);
        }

        if (Input.GetKeyDown(KeyCode.LeftControl))
        {
            mainPlayer.transform.localScale = new Vector3(1.0f, 0.5f, 1.0f);
            Debug.Log("Left control held down");
        }

        if (Input.GetKeyUp(KeyCode.LeftControl))
        {
            mainPlayer.transform.localScale = new Vector3(1.0f, 1.0f, 1.0f);
            Debug.Log("Left control no longer held down");
        }

        if (Input.GetKeyDown(KeyCode.H))
        {
            isActive = !isActive;
        }

        if (isActive)
        {
            crossHair.SetActive(true);
        }
        else
        {
            crossHair.SetActive(false);
        }
    }

    private bool isGrounded()
    {
        return Physics.Raycast(transform.position, Vector3.down, col.bounds.extents.y + 0.1f);
    }
}

I don’t know if I am being overly pedantic as the player moves fine, but is there anyway to make the movement / camera movement more smoother when the player moves in any given direction? Or have I done the best I can here? Looking for feedback on my code more than anything in this respect.

2

Instead of setting the speed, set the acceleration. Have a separate variable store the velocity. In the Update() function, use velocity = velocity * acceleration; Clamp the magnitude of the velocity between 0 and the max velocity.

3

Thanks for the tips, can you be a bit more specific on which lines you are referring to please?