First Person Controller

using System.Collections;using System.Collections.Generic;using UnityEngine;
public class FirstPersonController : MonoBehaviour{ private float rotationX = 0F; private float rotationY = 0F; private Quaternion originalRotation;
[SerializeField] private float MoveSpeed = 0.1f; [SerializeField] private float CursorSensitivity = 5f;
void Start() { originalRotation = Quaternion.identity;
Cursor.visible = false; } void Update() { float CurrentSpeed = MoveSpeed; if (Input.GetKey(KeyCode.W)) { transform.position += transform.forward * MoveSpeed; } if (Input.GetKey(KeyCode.E)) { transform.position += transform.up * MoveSpeed; } if (Input.GetKey(KeyCode.Q)) { transform.position -= transform.up * MoveSpeed; } if (Input.GetKey(KeyCode.A)) { transform.position -= transform.right * MoveSpeed; } if (Input.GetKey(KeyCode.S)) { transform.position -= transform.forward * MoveSpeed; } if (Input.GetKey(KeyCode.D)) { transform.position += transform.right * MoveSpeed; } if (Input.GetKeyDown(KeyCode.Q)) { Application.Quit(); }
UpdateXandY(); }
private void UpdateXandY() { rotationX += Input.GetAxis("Mouse X"); rotationY += Input.GetAxis("Mouse Y"); Quaternion xQuaternion = Quaternion.AngleAxis(rotationX * CursorSensitivity, Vector3.up); Quaternion yQuaternion = Quaternion.AngleAxis(rotationY * CursorSensitivity, -Vector3.right); transform.localRotation = originalRotation * xQuaternion * yQuaternion; }}

Basically, you just need 2 floats to represent the horizontal and vertical angles that you are looking at which is called Spherical Coordinates.

Based on the cursor x and y positions we will rotate the player which has the camera attached to it as a child object.

Then for WASD movement, we just use the Player's transform to get the forward direction and add some movement.

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