Unity VR First Person Shooter

Creating Terrain

Open Unity and create a new project called YourName-Unity-VR-FPS
Go into the Assets store and search and download Mega Fantasy Props Pack. After the download is complete, click import.
Create a new Terrain by right-clicking in the Hierarchy window then select 3D Object > Terrain
Change the Terrain Width and Terrain Length of the terrain to 200:
Under the Terrain component, we select the paintbrush from the tool bar to paint the texture.
Add the grass_1_fixed_d texture. You can do this by searching for grass_1_fixed_d in the Assets folder located in the Project window. Set the x and y size of the terrain to 1
Add another texture called Dirt_1_fixed_d
Select the dirt texture and the biggest brush to add a dirt patch. This is where we will put our buildings.

Adding Buildings

Click on the Mega Fantasy Props Pack folder. Add buildings or props from the Prefab folder. Be creative!

Setting Up Our Character

NOTE: Because this is a VR game, the MAIN CAMERA will be our player

Go into the Hierarchy window and create an empty game object make sure nothing is highlighted in the Hierarchy window before you add the empty object!. Right click and select Create Empty. Rename it Player then we’ll make our main camera a child of player.
From the Hierarchy window, drag the Main Camera into the Player so that Main Camera becomes the child of Player. Your Hierarchy should look like:
Set the Main Camera position to (0, 1, 0) and the Player position to be (5, 1, 5)
Add a Capsule Collider component to the Player game object and set the height to 2
Attach a RigidBody component to Player
Make sure the Player game object is highlighted. Next, create a new script called PlayerController. Delete everything in the script and add the following:

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

public class PlayerController : MonoBehaviour {

   public float Speed = 3f;

   private Vector3 _movement;
   private Rigidbody _playerRigidBody;

   private void Awake()
   {
       _playerRigidBody = GetComponent<Rigidbody>();
   }


   private void FixedUpdate()
   {
       float horizontal = Input.GetAxisRaw("Horizontal");
       float vertical = Input.GetAxisRaw("Vertical");

       Move(horizontal, vertical);
   }

   private void Move(float horizontal, float vertical)
   {
       _movement = (vertical * transform.forward) + (horizontal * transform.right);
       _movement = _movement.normalized * Speed * Time.deltaTime;
       _playerRigidBody.MovePosition(transform.position + _movement);
   }
}

Rotating Camera

In the Hierarchy window, select Main Camera and add a new script component called MouseCameraController delete everything and add the following:

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

public class MouseCameraController : MonoBehaviour {
	public float Sensitivity = 5.0f;
	public float Smoothing = 2.0f;

	private Vector2 _mouseLook;
	private Vector2 _smoothV;

	private GameObject _player;

	void Awake () {
		_player = transform.parent.gameObject;
	}

	// Update is called once per frame
	void Update () {
		Vector2 mouseDirection = new Vector2 (Input.GetAxisRaw ("Mouse X"), Input.GetAxisRaw ("Mouse Y"));

		mouseDirection.x *= Sensitivity * Smoothing;
		mouseDirection.y *= Sensitivity * Smoothing;

		_smoothV.x = Mathf.Lerp (_smoothV.x, mouseDirection.x, 1f / Smoothing);
		_smoothV.y = Mathf.Lerp (_smoothV.y, mouseDirection.y, 1f / Smoothing);

		_mouseLook += _smoothV;
		_mouseLook.y = Mathf.Clamp (_mouseLook.y, -90, 90);

		transform.localRotation = Quaternion.AngleAxis (-_mouseLook.y, Vector3.right);
		_player.transform.rotation = Quaternion.AngleAxis (_mouseLook.x, _player.transform.up);
	}
}

Setting Up A Weapon

In the Hierarchy window, select Main Camera. Next, create a Cube 3D Object and rename it to Gun
Change the Position to (0.25, -0.5, 1) and the Scale to (0.25, 0.25, .5)
In the Inspector window remove the Box Collider component from the Gun game object. Your window should look like the following:
Select Gun next, right click and select Effects > Particle System
Change the Particle System configurations to:

Duration: 1
Looping: unchecked
Start Lifetime: 0.05
Start Speed: 5
Start Size: 1
Start Color: Yellow
Play Awake: unchecked

In the Hierarchy window select Main Camera and create a new script called PlayerShootingController delete everything and replace with:

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

public class PlayerShootingController : MonoBehaviour {
	public float Range = 100;

	private Camera _camera;
	private ParticleSystem _particle;

	void Start () {
        _camera = Camera.main;
        _particle = GetComponentInChildren<ParticleSystem>();
        Cursor.lockState = CursorLockMode.Locked;
}

	void Update () {

		if (Input.GetMouseButton (0)) {
			Ray ray = _camera.ScreenPointToRay (Input.mousePosition);
			RaycastHit hit = new RaycastHit ();

			if (Physics.Raycast (ray, out hit, Range)) {
				print ("hit " + hit.collider.gameObject);

				_particle.Play ();
			}
		}
	}
}

In the Hierarchy window, make sure everything is deselected. Next, right-click and select UI > Image. Rename the image to Crosshair
In the Inspector window change the Width and Height to 10. You should now have something that looks like:
Select Canvas and add a Canvas Group from the Inspector window. Deselect Interactable and Blocks Raycasts

Creating An Enemy

In the Hierarchy window, make sure everything is deselected. Next, create a new Cube 3D Object. Rename it to Enemy.
With Enemy selected in the Hierarchy window, create a new script called EnemyHealth. Delete everything and replace with:

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

public class EnemyHealth : MonoBehaviour {
	public float Health = 10;

	public void TakeDamage (float damage) {
		Health -= damage;
		if (Health == 0) {
			Destroy (gameObject);
		}
	}
}

With the Enemy object selected in the Hierarchy window. Go to the Inspector window and find the Layer drop down and add a new layer called Shootable. Your window should now look like the following:
Go back to the PlayerShootingController script and replace the code with the following:

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

public class PlayerShootingController : MonoBehaviour {
	public float Range = 100;

	private Camera _camera;
	private ParticleSystem _particle;
	private LayerMask _shootableMask;

	void Start () {
		_camera = Camera.main;
		_particle = GetComponentInChildren<ParticleSystem> ();
		Cursor.lockState = CursorLockMode.Locked;
		_shootableMask = LayerMask.GetMask ("Shootable");
	}

	void Update () {
		if (Input.GetMouseButton (0)) {
			Ray ray = _camera.ScreenPointToRay (Input.mousePosition);
			RaycastHit hit = new RaycastHit ();

			if (Physics.Raycast (ray, out hit, Range, _shootableMask)) {
				print ("hit " + hit.collider.gameObject);
				_particle.Play ();

				EnemyHealth health = hit.collider.GetComponent<EnemyHealth> ();
				if (health != null) {
					health.TakeDamage (1);
				}
			}
		}
	}
}

WHEN YOU GET TO THIS STEP CALL OVER AN INSTRUCTOR TO HELP YOU DOWNLOAD THE Mecanim Warrior Anim FOLDER FROM THIS REPOSITORY
From the Assets Store search for Warrior Pack Bundle 1 and Strong Knight download and import.
In the Project window, deselect everything, then create a new folder called Animation
Right click the Animation folder and select Create > Animation Controller. Rename the Animation Controller to Knight Controller
Create 3 parameters: bool: IsPlayerNear, trigger: Death, trigger: Idle
Drag the following animations into Animation Controller:

death from Mecanim Warrior
Attack1 from Brute Warrior Mecanim
Idle from Brute Warrior Mecanim
Run from Brute Warrior Mecanim

WHEN YOU GET TO THIS STEP CALL OVER AN INSTRUCTOR TO HELP YOU WITH THE ANIMATIONS Your animation flow should look like. Right click on the button and select Make Transition. To create conditions click the arrow and a screen will appear in the Inspector window to create conditions:
- Run => Attack (IsPlayerNear = true)
- Attack => Run (IsPlayerNear = false)
- Any State => Idle (Idle)
- Any State => Death (Death)
Drag the Knight from the prefabs folder into the Scene. Next, drag the Knight Controller to the Knight object in the Hierarchy window.
Add a Nav Mesh Agent component to the Knight
Open up the Navigation window by going to the top of the screen where File, Edit, Selection, Etc is located. Select Window > Navigation. The Navigation window will pop up in the same area as Inspector
In the Bake hit the Bake Button
With the Knight selected in the Hierarchy window, create a new script called EnemyMovement. Delete and replace the script with the following:

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

public class EnemyMovement : MonoBehaviour {
	private NavMeshAgent _nav;
	private Transform _player;

	void Start () {
		_nav = GetComponent<NavMeshAgent> ();
		_player = GameObject.FindGameObjectWithTag ("Player").transform;
	}

	void Update () {
		_nav.SetDestination (_player.position);
	}
}

Click on Player in the Hierarchy window and change the Tag in the Inspector window to Player
Add a Capsule Collider component to the Knight game object and change these settings:

Is Trigger is checked
Y Center is 1
Y Radius is 1.5
Y Height is 1 Your screen should look like:

Select the Knight in the Hierarchy window. Next, create a new script called EnemyAttack. Delete and replace with the following script:

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

public class EnemyAttack : MonoBehaviour {
	Animator _animator;
	GameObject _player;

	void Awake () {
		_player = GameObject.FindGameObjectWithTag ("Player");
		_animator = GetComponent<Animator> ();
	}

	void OnTriggerEnter (Collider other) {
		if (other.gameObject == _player) {
			_animator.SetBool ("IsNearPlayer", true);
		}
	}

	void OnTriggerExit (Collider other) {
		if (other.gameObject == _player) {
			_animator.SetBool ("IsNearPlayer", false);
		}
	}
}

Note: If the Knight stops attacking after the first time, check the attack animation clip and make sure Loop Time is checked. loop-time

Add a Mesh Collider component to the Knight game object.
Attach the body mesh that our Knight uses to the Mesh Collider
Click on Attack1 in the Animator and the select the Animation tab to open it
Duplicate the Attack1 by typing cmd+d and rename it to Knight Attack. Next, drag Knight Attack into the Animation folder.
Back in the Animator tab for the Knight Animator Controller, switch the Attack1 state to use the new Knight Attack animation clip instead of the previous one.
In the EnemyAttack script replace with the following:

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

public class EnemyAttack : MonoBehaviour {
	private Animator _animator;
	private GameObject _player;
	private bool _collidedWithPlayer;

	void Awake () {
		_player = GameObject.FindGameObjectWithTag ("Player");
		_animator = GetComponent<Animator> ();
	}

	void OnTriggerEnter (Collider other) {
		if (other.gameObject == _player) {
			_animator.SetBool ("IsNearPlayer", true);
		}
		print ("enter trigger with _player");
	}

	void OnCollisionEnter (Collision other) {
		if (other.gameObject == _player) {
			_collidedWithPlayer = true;
		}
		print ("enter collided with _player");
	}

	void OnCollisionExit (Collision other) {
		if (other.gameObject == _player) {
			_collidedWithPlayer = false;
		}
		print ("exit collided with _player");
	}

	void OnTriggerExit (Collider other) {
		if (other.gameObject == _player) {
			_animator.SetBool ("IsNearPlayer", false);
		}
		print ("exit trigger with _player");
	}

	void Attack () {
		if (_collidedWithPlayer) {
			print ("player has been hit");
		}
	}
}

Attacking Enemies & Health System

Select Player from the Hierarchy window and change change Drag in the Inspector window to 5.
Drag the EnemyHealth script to Knight in the Hierarchy window, Next, open the script and replace with the following:

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

public class EnemyHealth : MonoBehaviour {
	public float Health = 10;

	private Animator _animator;

	void Start () {
		_animator = GetComponent<Animator> ();
	}

	public void TakeDamage (float damage) {
		if (Health <= 0) {
			return;
		}

		Health -= damage;
		if (Health <= 0) {
			Death ();
		}
	}

	private void Death () {
		_animator.SetTrigger ("Death");
	}
}

In the EnemyMovement script replace with the following:

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

public class EnemyMovement : MonoBehaviour
{
    private NavMeshAgent _nav;
    private Transform _player;
    private EnemyHealth _enemyHealth;

    void Start ()
    {
        _nav = GetComponent<NavMeshAgent>();
        _player = GameObject.FindGameObjectWithTag("Player").transform;
        _enemyHealth = GetComponent<EnemyHealth>();
    }

    void Update ()
    {
        if (_enemyHealth.Health > 0)
        {
            _nav.SetDestination(_player.position);
        }
        else
        {
            _nav.enabled = false;
        }
    }
}