add: player movement and camera scripts

Assets/Scripts/CameraMovement.cs

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+using UnityEngine;
+
+public class CameraMovement : MonoBehaviour
+{
+    public float horSpeed = 20f;
+    public float verSpeed = 20f;
+    public float verUpperBound = 45f;
+    public float verLowerBound = -45f;
+
+    private float verRotation = 0f;
+    private Camera cam;
+
+    void Start() {
+        cam = GetComponentInChildren<Camera>();
+        Cursor.lockState = CursorLockMode.Locked;
+        Cursor.visible = false;
+    }
+
+    void Update() {
+        float horRotation = Input.GetAxis("Mouse X") * Time.deltaTime * horSpeed;
+        transform.Rotate(0, horRotation, 0);
+
+        verRotation -= Input.GetAxis("Mouse Y") * Time.deltaTime * verSpeed;
+        verRotation = Mathf.Clamp(verRotation, verLowerBound, verUpperBound);
+        cam.transform.localEulerAngles = new(verRotation, 0, 0);
+    }
+}

Assets/Scripts/CameraMovement.cs.meta

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+fileFormatVersion: 2
+guid: 1241dd14aac57cb40a0e8493ced10162

Assets/Scripts/PlayerMovement.cs

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+using UnityEngine;
+
+public class PlayerMovement : MonoBehaviour
+{
+    public float speed = 1f;
+    public float sprintSpeedMultiplier = 2f;
+    public float crouchSpeedMultiplier = 0.5f;
+    public float crouchHeightMultiplier = 0.5f;
+    public float jumpForce = 1f;
+    public float gravityMultiplier = 1f;
+
+    Rigidbody rb;
+    CharacterController characterController;
+    [SerializeField] bool isCrouching = false;
+    Vector3 charControllerCenter;
+
+    void Start() {
+        rb = GetComponent<Rigidbody>();
+        characterController = GetComponent<CharacterController>();
+        charControllerCenter = characterController.center;
+    }
+
+    void Update() {
+        HandleCrouching();
+        HandleJumping();
+        HandleMovement();
+        DoGravity();
+    }
+
+    void HandleCrouching() {
+        if (Input.GetKeyDown(KeyCode.C)) {
+            isCrouching = !isCrouching;
+            if (isCrouching) {
+                characterController.center += Vector3.down * (characterController.height * (1 - crouchHeightMultiplier)) / 2;
+                characterController.height *= crouchHeightMultiplier;
+            } else {
+                characterController.height /= crouchHeightMultiplier;
+                characterController.center -= Vector3.down * (characterController.height * (1 - crouchHeightMultiplier)) / 2;
+            }
+            if (characterController.isGrounded) rb.AddForce(Vector3.up * (characterController.height / 5), ForceMode.VelocityChange);
+        }
+    }
+
+    void HandleJumping() {
+        if (Input.GetKeyDown(KeyCode.Space) && characterController.isGrounded) {
+            rb.AddForce(Vector3.up * jumpForce, ForceMode.VelocityChange);
+        }
+    }
+
+    void HandleMovement() {
+        float horInput = Input.GetAxis("Horizontal");
+        float verInput = Input.GetAxis("Vertical");
+        Vector3 movementVec = new(horInput, 0, verInput);
+        movementVec = transform.TransformDirection(movementVec);
+        movementVec = Vector3.ClampMagnitude(movementVec * speed, speed) * Time.deltaTime;
+        float modifier = isCrouching ? crouchSpeedMultiplier : Input.GetKey(KeyCode.LeftShift) ? sprintSpeedMultiplier : 1;
+
+        characterController.Move(movementVec * modifier);
+    }
+
+    void DoGravity() {
+        characterController.Move(rb.linearVelocity * (gravityMultiplier * Time.deltaTime));
+        if (characterController.isGrounded) rb.linearVelocity *= 0.2f;
+    }
+
+    void OnControllerColliderHit(ControllerColliderHit hit) {
+        hit.gameObject.SendMessage("ReverseOnControllerColliderHit", hit, SendMessageOptions.DontRequireReceiver);
+    }
+}

Assets/Scripts/PlayerMovement.cs.meta

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+fileFormatVersion: 2
+guid: ecc089d81c2c4574693f263b2365fdc5