本篇使用的是5.3版後有UNET的UNITY
目標：基本連線遊戲機制+線上怪物
1.延續前篇(UNET連線遊戲(七){原來這就是掛掉的感覺})
除了連線玩家，以及場景的布置外，還可以在場中加入一些由伺服器控制的NPC怪物增添遊戲的樂趣。首先處理場景的布置~
為了節省效能，我們開啟Window→Lighting關閉Auto Bake並烘焙貼圖後關閉即時的GI渲染，讓遊戲運行的快些節省網路效能。
2.選取全部的地板Window→Navigation按下Bake創建一個導航平面給怪物NPC使用。
3.創建一個空物件當作怪物的重生點，並掛上MonsterSpawner.cs
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
public class MonsterSpawner : NetworkBehaviour {
public GameObject monster;
public int monsterNum;
public float R=3;
void Start () {
InvokeRepeating ("CmdScanMonster",3f ,10f);
}
[Command]
void CmdSpawnMonster(){
for(int i=0 ; i < monsterNum ; i++){
Vector3 pos = new Vector3 (this.transform.position.x + Random.Range(-R,R) , this.transform.position.y , this.transform.position.z + Random.Range(-R,R) );
GameObject mon = (GameObject)Instantiate (monster , pos ,this.transform.rotation);
mon.name = "Monster";
NetworkServer.Spawn (mon);
}
}
[Command]
void CmdScanMonster(){
if (!GameObject.FindWithTag ("MONSTER")) {
CmdSpawnMonster ();
}
}
}
內容如下
InvokeRepeating (“CmdScanMonster”,3f ,10f); 開始3秒後掃描場上是否存在怪物，之後每10秒檢查一次。若無就執行創造怪物的方法。
4.怪物的造型就要發威各位的創意了，該卦的程式還是要掛上。
由於這些程式要改成也能怪物使用，稍做改寫。
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using UnityEngine.UI;
public class EnemyHP : NetworkBehaviour {
private GameObject HudBar;
// Use this for initialization
void Start () {
SpawnHpBar ();
}
// Update is called once per frame
void Update () {
}
void SpawnHpBar ()
{
if (!isLocalPlayer) {
HudBar = Instantiate (Resources.Load ("HP_ENEMY")) as GameObject;
if (this.tag == "MONSTER") {
HudBar.name = "MONSTER_" + GetComponent<NetworkIdentity> ().netId.ToString ();
}else
HudBar.name = "PLAYER_" + GetComponent<NetworkIdentity> ().netId.ToString ();
HudBar.transform.parent = GameObject.Find ("HUD").transform;
HudBar.GetComponent<UIReset> ().playerName = this.gameObject;
} else {
HudBar = Instantiate (Resources.Load ("HP")) as GameObject;
if (this.tag == "MONSTER") {
HudBar.name = "MONSTER_" + GetComponent<NetworkIdentity> ().netId.ToString ();
}else
HudBar.name = "PLAYER_" + GetComponent<NetworkIdentity> ().netId.ToString ();
HudBar.transform.parent = GameObject.Find ("HUD").transform;
HudBar.GetComponent<UIReset> ().playerName = this.gameObject;
HudBar.GetComponent<UIReset> ().offsetXY = 10f;
}
this.gameObject.GetComponent<DamageScript> ().HP_BAR = HudBar.GetComponent<Image>();
}
}
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using UnityEngine.UI;
using UnityStandardAssets.Characters.FirstPerson;
public class DamageScript : NetworkBehaviour {
AudioSource damageAudio;
GunController gunCtrl;
FirstPersonController fpsCtrl;
CharacterController charCtrl;
public Image HP_BAR;
public Image DEAD_BG;
public const int HP_MAX = 3;
public const int HPMON_MAX = 300;
float rotaSpeed;
[SyncVar(hook = "HpBar")]public int HP = HP_MAX;
void Awake()
{
}
void Start (){
if (this.gameObject.tag == "MONSTER") {
HP = HPMON_MAX;
}
damageAudio = GetComponent<AudioSource>();
gunCtrl = GetComponent<GunController> ();
fpsCtrl = GetComponent<FirstPersonController> ();
charCtrl = GetComponent<CharacterController> ();
DEAD_BG = GameObject.Find ("BG").GetComponent<Image> ();
}
public void TakeDamage(int D){
// if (!isServer) {
// return;
// }
print ("GET");
if (HP > 0) {
HP -= D;
if (HP <= 0) {
if (this.gameObject.tag == "MONSTER") {
NetworkServer.Destroy (this.gameObject);
Destroy (this.gameObject);
}else RpcRebirth ();
}
}
}
void HpBar(int h){
print (h);
if (this.gameObject.tag == "MONSTER") {
if(HP_BAR)HP_BAR.fillAmount = (float)h / (float)HPMON_MAX;
}else if(HP_BAR)HP_BAR.fillAmount = (float)h / (float)HP_MAX;
}
void Alive(bool b){
gunCtrl.alive = b;
fpsCtrl.enabled = b;
charCtrl.enabled = b;
rotaSpeed = 270f;
InvokeRepeating ("Dead",0.1f,0.02f);
}
void Dead (){
transform.Rotate(Vector3.right * Time.deltaTime * -30);
transform.Rotate(Vector3.up * Time.deltaTime * rotaSpeed);
rotaSpeed-=1.5f;
DEAD_BG.color += new Color (0, 0, 0, 0.003f);
}
[ClientRpc]
void RpcRebirth(){
Invoke ("Go",5.0f);
print ("DIE");
if (isLocalPlayer)Alive (false);
}
void Go(){
HP = HP_MAX;
if (isLocalPlayer) {
DEAD_BG.color = new Color (1, 0, 0, 0);
Transform spawn = NetworkManager.singleton.GetStartPosition();
transform.position = spawn.position;
Alive (true);
CancelInvoke ("Dead");
}
}
}
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using UnityEngine.UI;
public class PlayerID : NetworkBehaviour {
void Start () {
GetNetIdentity ();
}
// Update is called once per frame
void Update () {
}
void GetNetIdentity(){
if (this.tag == "MONSTER") {
this.gameObject.name = "MONSTER_" + GetComponent<NetworkIdentity> ().netId.ToString();
}else
this.gameObject.name = "PLAYER_" + GetComponent<NetworkIdentity> ().netId.ToString();
}
public string ID(){
return this.gameObject.name;
}
}
以上都是為了是否為怪物增加的條件判斷。
5.怪物身上重點功能導航目標，首先新增Component零件NavMeshAgent，以及球形Trigger把半徑加大為5。
6.接下來撰寫SearchPlayer.cs搜索玩家的功能
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
public class SearchPlayer : NetworkBehaviour {
NavMeshAgent Nav;
public GameObject target;
public bool serverMonster;
// Use this for initialization
void Start () {
if (isServer) {
serverMonster = true;
Nav = GetComponent<NavMeshAgent> ();
} else
serverMonster = false;
}
// Update is called once per frame
void FixedUpdate () {
if (target && target != null && serverMonster) {
Nav.SetDestination(target.transform.position);
if (CloseYou ()) {
target = null;
Nav.Stop(true);
}
}
}
void OnTriggerStay(Collider other) {
if(other.tag == "PLAYER" && serverMonster){
Nav.Resume ();
target = other.gameObject;
}
}
bool CloseYou(){
float dis = Vector3.Distance(transform.position, target.transform.position);
if (dis < 5f) {
Nav.Stop ();
target.GetComponent<DamageScript> ().TakeDamage (3);
return true;
} else {
Nav.Resume ();
return false;
}
}
}
首先判定是否為SERVER端取得導航控件，然後將導航目標設為踩進球型偵測區的PLAYER，還有是否進入到攻擊範圍的CloseYou方法，執行傷害玩家以及導航關閉的功能。將怪製成預制物件後從場景刪除，指定給生怪程式還有NetworkManager的線上成員註冊。
7.另個可以擴增的功能則是攻擊打他的玩家，因此思考下這個程式邏輯便會得到，子彈需要帶有玩家資訊的結論；玩家帶著槍槍發射子彈，所以我們要改寫GunController.cs以及AmmoController.cs的內容，首先子彈的部分：需要一個可以帶玩家資訊的欄位
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
public class AmmoController : NetworkBehaviour
{
private float lifeTime;
public float maxTime = 3.0f;
public GameObject fromWho;
void Start ()
{
lifeTime = 0.0f;
}
[ServerCallback]
void Update ()
{
lifeTime += Time.deltaTime;
if( lifeTime > maxTime )
{
DestroyAmmo();
}
}
void OnCollisionEnter(Collision other)
{
if (other.gameObject.tag == "PLAYER") {
other.gameObject.GetComponent<DamageScript>().TakeDamage (1);
DestroyAmmo ();
}
if (other.gameObject.tag == "MONSTER") {
other.gameObject.GetComponent<DamageScript>().TakeDamage (1);
other.gameObject.GetComponent<SearchPlayer> ().target = fromWho;
DestroyAmmo ();
}
}
public void DestroyAmmo(){
NetworkServer.Destroy(gameObject);
}
}
這裡我們用fromWho來裝載這個資訊，並寫在打到怪物標籤物體時遞給怪物的目標物。
接著槍的部分：則是發射時將發射玩家的資訊貼到子彈的fromWho欄位中。
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
public class GunController : NetworkBehaviour
{
private float power;
private Transform playerCamera;
public bool alive = true;
void Start ()
{
power = 800.0f;
playerCamera = transform.FindChild("FirstPersonCharacter");
}
void Update ()
{
if(isLocalPlayer)
{
if(Input.GetButtonDown("Fire1") && alive)
{
CmdSpawnAmmo();
}
}
}
[Command]
void CmdSpawnAmmo ()
{
GameObject instance = Instantiate (Resources.Load ("Ammo")) as GameObject;
instance.name = "Ammo";
instance.transform.position = playerCamera.position + playerCamera.forward * 1.5f + playerCamera.up * -.5f;
instance.GetComponent<Rigidbody> ().AddForce (playerCamera.forward * power);
instance.GetComponent<AmmoController> ().fromWho = this.gameObject;
NetworkServer.Spawn (instance);
}
}
驗收!!
