Player.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent (typeof (PlayerController))]
[RequireComponent (typeof (GunController))]
public class Player : LivingEntity {

	public float moveSpeed = 5;

	Camera viewCamera;
	PlayerController controller;
	GunController gunController;
	
	protected override void Start () {
		base.Start ();
		controller = GetComponent<PlayerController> ();
		gunController = GetComponent<GunController> ();
		viewCamera = Camera.main;
	}

	void Update () {
		// Movement input
		Vector3 moveInput = new Vector3 (Input.GetAxisRaw ("Horizontal"), 0, Input.GetAxisRaw ("Vertical"));
		Vector3 moveVelocity = moveInput.normalized * moveSpeed;
		controller.Move (moveVelocity);

		// Look input
		Ray ray = viewCamera.ScreenPointToRay (Input.mousePosition);
		Plane groundPlane = new Plane (Vector3.up, Vector3.zero);
		float rayDistance;

		if (groundPlane.Raycast(ray,out rayDistance)) {
			Vector3 point = ray.GetPoint(rayDistance);
			//Debug.DrawLine(ray.origin,point,Color.red);
			controller.LookAt(point);
		}

		// Weapon input
		if (Input.GetMouseButton(0)) {
			gunController.Shoot();
		}
	}
}