1 files changed, 145 insertions, 0 deletions
diff --git a/td/Assets/Scripts/tower.cs b/td/Assets/Scripts/tower.cs
new file mode 100644
index 0000000..004605b
--- /dev/null
+++ b/td/Assets/Scripts/tower.cs
@@ -0,0 +1,145 @@
+using UnityEngine;
+
+public class Tower : MonoBehaviour {
+
+	[Header("Attributes")]
+	public int TowerPrice;           // The price of the tower, set this in the desiger (tower prefab)
+	public float FireRate;           // How long the turret should use to reload, Set in designer (tower prefab)
+	public float TurnSpeed;          // How fast the turret should rotate. Set in designer (tower prefab)
+	[Range(0, 10)]
+	public float TowerRange;         // How large the range of the tower is. this is the diameter. Set in designer (tower prefab)
+	public GameObject ProjectilePrefab;
+	public Transform FirePoint;
+	[Header("Materials")]
+	public Material MaterialDanger;  // The material used when tower can't be placed, set in the designer (tower prefab)
+	public Material MaterialSuccess; // The material used when the tower can be placed, or is selected, set in the designer (tower prefab)
+	[Header("Scripting vars")]
+	public Player Player;            // Reference to the player object, should be set when instantiating
+
+	private GameObject _placementIndicator;        // The placement indicator
+	private Renderer _placementIndicatorRenderer;  // The renderer of the placement indicator
+	private Plane _groundPlane;                    // Plane used for raycasting when placing tower
+	private float _groundYpoint = 0.525f;          // What Y-position the Tower should be placed on, this should be constant in every use-case.
+	private bool _towerPlaced;                     // Bool used to descide what to do this frame
+	private bool _colliding;                       // Set if the tower collides with any GameObject, used when placing, to see where it can be placed
+
+	private Transform _target;
+	private float _fireCountdown;
+
+	void Start () {
+		_placementIndicator = transform.GetChild (0).gameObject;
+		_placementIndicatorRenderer = _placementIndicator.GetComponent<Renderer> ();
+		_placementIndicator.transform.localScale = new Vector3 (TowerRange*7, 0.00000001f, TowerRange*7); 
+
+		_groundPlane = new Plane (Vector3.up, new Vector3(0f, _groundYpoint, 0f));
+	}
+
+	void Update () {
+
+		#region placeTower
+		if (!_towerPlaced) {
+			if (Input.touchCount == 1 || Input.GetMouseButton (0)) {
+				
+				/* Activate indicator if not already */
+				if (!_placementIndicator.activeSelf) { _placementIndicator.SetActive (true); }
+				/* Change indicator-color based on placement */
+				if (!_colliding) { _placementIndicatorRenderer.sharedMaterial = MaterialDanger; }
+				else { _placementIndicatorRenderer.sharedMaterial = MaterialSuccess; }
+				/* Calculate new position */
+				Ray touchRay = Camera.main.ScreenPointToRay (Input.mousePosition);
+				float rayDistance;
+				if (_groundPlane.Raycast (touchRay, out rayDistance)) {
+					transform.position = touchRay.GetPoint (rayDistance);
+				}
+
+			} else {
+				
+				/* User let go of the screen, decide if tower can be placed */
+				if (!_colliding) { Destroy (gameObject); }  // Skal kollidere for å være på et godkjent område
+				else {
+					_towerPlaced = true;
+					Player.MoneySubtract (TowerPrice);
+					_placementIndicator.SetActive (false);
+					_placementIndicatorRenderer.sharedMaterial = MaterialSuccess;
+					InvokeRepeating ("UpdateTarget", 0f, 0.5f);  // This starts the 
+					gameObject.GetComponent <BoxCollider>().enabled = false;
+				}
+
+			}
+
+			return;
+		}
+		#endregion
+
+		// Stop rest of update if no target is aquired
+		if (_target == null) {
+			return;
+		}
+		// Target lockon
+		Vector3 direction = _target.position - transform.position;
+		Quaternion lookRotation = Quaternion.LookRotation (direction);
+		Vector3 rotation = Quaternion.Lerp (transform.rotation, lookRotation, Time.deltaTime * TurnSpeed).eulerAngles;
+		transform.rotation = Quaternion.Euler (0f, rotation.y, 0f);
+
+		if (_fireCountdown <= 0f) {
+			// FAIAAAAA
+			Shoot();
+			_fireCountdown = 1f / FireRate;
+		}
+
+		_fireCountdown -= Time.deltaTime;
+
+	}
+
+	void Shoot() {
+		GameObject projectileGo = (GameObject) Instantiate (ProjectilePrefab, FirePoint.position, FirePoint.rotation);
+		Projectile projectile = projectileGo.GetComponent <Projectile>();
+		if (projectile != null) {
+			projectile.Player = Player;
+			projectile.Seek (_target);
+		}
+	}
+
+	void UpdateTarget() {
+		/* Method that updates the currentTarget.
+		 * The target will be set to the nearest in range */
+		GameObject[] enemies = GameObject.FindGameObjectsWithTag ("enemy");
+		float shortestDistance = Mathf.Infinity;
+		GameObject nearestEnemy = null;
+
+		foreach (var enemy in enemies) {
+			float distanceToEnemy = Vector3.Distance (transform.position, enemy.transform.position);
+			if (distanceToEnemy < shortestDistance) {
+				shortestDistance = distanceToEnemy;
+				nearestEnemy = enemy;
+			}
+		}
+
+		if (nearestEnemy != null && shortestDistance <= TowerRange) {
+			_target = nearestEnemy.transform;
+		} else {
+			_target = null;
+		}
+	}
+
+	void OnTriggerEnter(Collider other) {
+		_colliding = true;
+	}
+
+	void OnTriggerStay(Collider other) {
+		_colliding = true;
+	}
+
+	void OnTriggerExit(Collider other) {
+		_colliding = false;
+	}
+
+	void OnDrawGizmosSelected() {
+		/* Show gizmos in designer */
+		Gizmos.color = Color.red;
+		Gizmos.DrawWireSphere (transform.position, TowerRange);
+	}
+
+}
+
+