feat: player can jump with adjustable gravity

Assets/Scripts/PlayerMovement.cs

@@ -1,5 +1,4 @@
-using System.Collections;
-using System.Collections.Generic;
+using System;
 using UnityEngine;
 using UnityEngine.InputSystem;
 
@@ -8,20 +7,55 @@ public class PlayerMovement : MonoBehaviour
     private InputMaster _inputMaster;
     [SerializeField] private CharacterController controller;
     [SerializeField] private float speed;
+    [SerializeField] private Transform groundCheck;
+    private float _groundDistance = 0.4f;
+    [SerializeField] private LayerMask groundMask;
     
     private Vector2 _moveDirection;
+    private Vector3 _velocity;
+    private readonly float _gravity = -9.81f * 2f;
+    private bool _isGrounded;
+
+    private float _jumpHeight = 3f;
 
     private void Awake()
     {
         controller = GetComponent<CharacterController>();
         _inputMaster = new InputMaster();
         _inputMaster.Player.Move.Enable();
+        _inputMaster.Player.Jump.Enable();
     }
 
-    public void OnMove(InputAction.CallbackContext context)
-    {   
-        _moveDirection  = context.ReadValue<Vector2>();
-        Debug.Log("direction: " + _moveDirection);
+    private void Update()
+    {
+        _isGrounded = Physics.CheckSphere(groundCheck.position, _groundDistance, groundMask);
+        if (_isGrounded && _velocity.y < 0)
+        {
+            _velocity.y = -2f; //force player on the ground
+        }
+        
+        _moveDirection = _inputMaster.Player.Move.ReadValue<Vector2>();
+        Vector3 move = transform.right * _moveDirection.x + transform.forward * _moveDirection.y;
+        controller.Move(move * (speed * Time.deltaTime));
+        
+        _velocity.y += _gravity * Time.deltaTime;
+        controller.Move(_velocity * Time.deltaTime); // multiply again because of m/s^2
     }
 
+    public void Jump(InputAction.CallbackContext context)
+    {
+        if (context.performed)
+        {
+            if (_isGrounded)
+            {
+                _velocity.y = (float)Math.Sqrt(_jumpHeight * -2f * _gravity);
+            }
+        }
+    }
+
+    private void OnDisable()
+    {
+        _inputMaster.Player.Move.Disable();
+        _inputMaster.Player.Jump.Disable();
+    }
 }