Third person Character with mouse look

Questions & Answers
1

I am making a game, where I want to have a character, a generic unity capsule, to be moved around using the arrow keys/WASD, and turned using the mouse. I made a script, which according to my knowledge, should work fine. Script:
public Rigidbody Player;
public float jumpheight;
public float Speed;
public bool isGrounded;
Vector3 jump;

	void OnCollisionEnter(Collision col){
		if (col.gameObject.tag == "Ground") 
		{
			isGrounded = true;
			Debug.Log ("IsGrounded = true");
		} 
		else 
		{
			isGrounded = false;
			Debug.Log ("IsGrounded = false");
		}
	}
	// Update is called once per frame
	void FixedUpdate () {
		float forward = Input.GetAxis ("Vertical");
		float side = Input.GetAxis ("Horizontal");
		float rotY = Input.GetAxis ("Mouse X");

		gameObject.transform.Rotate (0, rotY, 0);
		Vector3 speed = new Vector3(forward, 0.0f, side);
		Player.AddForce(speed);

		if (Input.GetButtonDown("Jump") && isGrounded == true)
		{
			Jump ();
		}

	}
	void Jump(){
		jump = new Vector3 (0.0f, jumpheight, 0.0f);
		Player.AddForce(jump);
		Debug.Log ("Jumping");
		isGrounded = false;
	}

However when I play the game, the character does not move, and even when it does, it does not follow the capsules’ “forward”. It just moves on the initial x and z axis.
Any help would be appreciated.

2

instead of Vector3.speed = new Vector3(…)
you should do:

Vector3 speed = transform.forward * Input.GetAxis(“Vertical”) + transform.right * Input.GetAxis(“Horizontal”);

The other problem maybe can be solved by adding a Physic material with 0 friction to both the player and the terrain.