player controller dilema

Questions & Answers
1

I’ve trying to create a script which acts as a player controller for a 3rd person type of game. I’ve had a multitude of problems which I can’t yet solve.
The first is that I’m not able to hold down such a button and the forward action is repeated. I’m only able to click once.
The second issue is that I don’t know how to change it to a local axis. This might not be the problem, but when a key is pressed, I want the character to go forward in the direction the character is facing, not along a global axis.
Finally, even though I have a float variable which i reference along all axis’s, I’m only able to move the character in 1 direction (along the z axis).
script

public class playercontroller : MonoBehaviour {
public float Speed = 7f;
public Rigidbody daRB;
// Use this for initialization
void Start () {
daRB = GetComponent< Rigidbody >();
}

// Update is called once per frame
void FixedUpdate () {

	if (Input.GetKeyDown("w"))
	{
		daRB.velocity = new Vector3(daRB.velocity.x, daRB.velocity.y, Speed);
	}

	if (Input.GetKeyDown("w") && Input.GetKeyDown("A"))
	{
		daRB.velocity = new Vector3(-Speed, daRB.velocity.y, Speed);
	}

	if (Input.GetButtonDown("w") && Input.GetButton("d"))
	{
		daRB.velocity = new Vector3(Speed, daRB.velocity.y, Speed);
	}

	if (Input.GetKeyDown("s"))
	{
		daRB.velocity = new Vector3(daRB.velocity.x, daRB.velocity.y, -Speed);
	}

	if (Input.GetButtonDown("s") && Input.GetButton("a"))
	{
		daRB.velocity = new Vector3(-Speed, daRB.velocity.y, -Speed);
	}

	if (Input.GetButtonDown("s") && Input.GetButton("d"))
	{
		daRB.velocity = new Vector3(Speed, daRB.velocity.y, -Speed);
	}
}

}

2

Here is the movement script I usually use:

void FixedUpdate () {
	var x = Input.GetAxis ("Horizontal");
	var z = Input.GetAxis ("Vertical");
	
	daRB.MovePosition(transform.position + transform.forward * Time.deltaTime) * Speed;
}