狀態(tài)同步的一個(gè)核心是把整個(gè)游戲的所有數(shù)據(jù)與邏輯都跑到服務(wù)器上。

一聽感覺很難,其實(shí)也就是像寫客戶端一樣，跑一個(gè)update的幀頻率來進(jìn)行迭代(一般1秒15~20次迭代，或者動(dòng)態(tài)調(diào)整)。

和客戶端一樣，每個(gè)游戲的玩家都有一個(gè)數(shù)據(jù)對象，唯一不同的是客戶端有渲染，服務(wù)器只有數(shù)據(jù)沒有渲染。一般我們會(huì)在邏輯服上創(chuàng)建一個(gè)類似的數(shù)據(jù)結(jié)構(gòu):

public class PlayerEntity { @Protobuf(order = 1, required = true) public StatusComponent statusInfo; // 玩家的狀態(tài); @Protobuf(order = 2, required = true) public AccountComponent accountInfo; @Protobuf(order = 3, required = true) public GhostPlayerInfoComponent ghostInfo; @Protobuf(order = 4, required = true) public EquipmentComponent equipmentInfo; @Protobuf(order = 5, required = true) public TransformComponent transformInfo; // 玩家私密的數(shù)據(jù)是不必要的; @Protobuf(order = 6, required = false) ? public PrivatePlayerInfoComponent playerInfo; public AOIComponent aoiComponent; public SkillBuffComponent skillBuffComponent; public AttackComponent attackComponent; public ShapeComponent shapeInfo; public AStarComponent astarComponent; public JoystickComponent joystickComponent; public PlayerEntity() { this.accountInfo = null; this.playerInfo = null; this.ghostInfo = null; this.equipmentInfo = null; this.shapeInfo = null; this.transformInfo = null; this.astarComponent = null; this.joystickComponent = null; this.attackComponent = null; this.skillBuffComponent = null; this.statusInfo = null; } public static PlayerEntity create(Player p) { PlayerEntity entity = new PlayerEntity(); entity.statusInfo = new StatusComponent(); entity.statusInfo.state = RoleState.Idle; entity.accountInfo = new AccountComponent(); entity.playerInfo = new PrivatePlayerInfoComponent(); entity.ghostInfo = new GhostPlayerInfoComponent(); entity.equipmentInfo = new EquipmentComponent(); entity.shapeInfo = new ShapeComponent(); entity.transformInfo = new TransformComponent(); entity.aoiComponent = new AOIComponent(); SkillBuffSystem.InitSkilBuffComponent(entity); entity.astarComponent = new AStarComponent(); entity.joystickComponent = new JoystickComponent(); entity.attackComponent = new AttackComponent(); entity.statusInfo.entityId = p.getId(); LoginMgr.getInstance().loadAccountComponentFromAccountId(entity.accountInfo, p.getAccountId()); PlayerMgr.getInstance().loadPlayerEntityFromPlayer(entity, p); PlayerMgr.getInstance().loadEquipMentComponentDataFromPlayer(entity.equipmentInfo, p); entity.shapeInfo.height = 2.0f; entity.shapeInfo.R = 0.5f; return entity; } }

比如上面的TransformComponent, 描述的就是這個(gè)游戲?qū)ο笤谑澜缰械奈恢?，旋轉(zhuǎn)。

public class TransformComponent { @Protobuf(order = 1, required = true) public Vector3Component position; @Protobuf(order = 2, required = true) public float eulerAngleY = 0; public TransformComponent clone() { TransformComponent t = new TransformComponent(); t.position = this.position.clone(); t.eulerAngleY = this.eulerAngleY; return t; } public void LookAt(Vector3Component point) { Vector3Component src = this.position; Vector3Component dir = Vector3Component.sub(point, src); float degree = (float)(Math.atan2(dir.z, dir.x) * 180 / Math.PI); degree = 360 - degree; this.eulerAngleY = degree + 90; } }

當(dāng)創(chuàng)建一個(gè)玩家登錄到邏輯服的時(shí)候，服務(wù)器中的3D世界就會(huì)創(chuàng)建一個(gè)這樣的數(shù)據(jù)對象。接下來就要嘗試讓這個(gè)對象在游戲世界中跑動(dòng)交互起來，服務(wù)端的地圖如何做呢？

其實(shí)地圖數(shù)據(jù)可以導(dǎo)出為地形高度圖(x, y, z)+道路連通數(shù)據(jù)(哪些是可以行走，哪些不可以行走)。這個(gè)對團(tuán)隊(duì)的技術(shù)積累是有一點(diǎn)要求的。根據(jù)游戲不同的類型來做地圖編輯器，來采用最合適的技術(shù)。

同時(shí)客戶端+服務(wù)端都要使用這套，客戶端有地圖編輯器工具編輯地圖的地形+烘焙地圖連通數(shù)據(jù)，能將這些數(shù)據(jù)按照對應(yīng)的格式導(dǎo)出給服務(wù)端用，服務(wù)端使用這些數(shù)據(jù)利用上面的Update來進(jìn)行迭代計(jì)算(和客戶端開發(fā)的Update迭代是一樣的)。

地圖技術(shù)+尋路導(dǎo)航解決以后，其它的推動(dòng)游戲計(jì)算的也移植到到服務(wù)端，比如物理引擎，我們可以在服務(wù)器上部署一個(gè)物理引擎，然后從服務(wù)端的update來做物理引擎模擬迭代，再把物理剛體位置旋轉(zhuǎn)等同步給服務(wù)端上的玩家數(shù)據(jù)對象，這樣讓服務(wù)器上也可以跑物理引擎。