CharacterController jump in unity - unity3d

Question

Hello I was trying to do movement script in Unity. Also I wanted to add jump, but everytime when I jump it moves up for like 0.025 on Y direction and stops the player in air*(if I am on 0 and I jump it moves on 0.02545 then 0.0543 etc...)* and I can spam Space to move player up. I added gravity but it looks it doesn't work.. I don't know how to fix it. I hope someone can help me with my problem...
Here is the function what I am using...
Vector3 moveDirection = Vector3.zero;
public float walkingSpeed = 10.0f;
public bool canJump = true;
public float jumpSpeed = 8.0f;
public float gravity = 10.0f;
CharacterController characterController;
void Movement()
{
Vector3 forward = transform.TransformDirection(Vector3.forward);
Vector3 right = transform.TransformDirection(Vector3.right);
float moveX = walkingSpeed * Input.GetAxis("Vertical");
float moveY = walkingSpeed * Input.GetAxis("Horizontal");
float MovementY = moveDirection.y;
moveDirection = (forward * moveX) + (right * moveY);
if (Input.GetButtonDown("Jump") && canJump)
{
moveDirection.y = jumpSpeed;
}
moveDirection.y -= gravity * Time.deltaTime;
characterController.Move(moveDirection * Time.deltaTime);
}

Answer 1

Because you are resetting moveDirection every frame (when you call moveDirection = (forward * moveX) + (right * moveY) you aren't letting the gravity accumulate. You should instead save the vertical speed separately and add it every frame.
Something like the following:
Vector3 moveDirection = Vector3.zero;
public float walkingSpeed = 10.0f;
public bool canJump = true;
public float jumpSpeed = 8.0f;
public float gravity = 10.0f;
CharacterController characterController;
private float verticalSpeed;
void Movement()
{
float moveX = walkingSpeed * Input.GetAxis("Vertical");
float moveY = walkingSpeed * Input.GetAxis("Horizontal");
verticalSpeed -= gravity * Time.deltaTime;
if (Input.GetButtonDown("Jump") && canJump)
{
verticalSpeed = jumpSpeed;
}
characterController.Move((moveX * transform.forward + moveY * transform.right + verticalSpeed * transform.up)
* Time.deltaTime);
}
transform.forward is equivalent to transform.TransformDirection(Vector3.forward)