更新文档
This commit is contained in:
YHH
510
docs/guide/scene.md
Normal file
510
docs/guide/scene.md
Normal file
@@ -0,0 +1,510 @@
|
||||
# 场景管理
|
||||
|
||||
在 ECS 架构中，场景（Scene）是游戏世界的容器，负责管理实体、系统和组件的生命周期。场景提供了完整的 ECS 运行环境。
|
||||
|
||||
## 基本概念
|
||||
|
||||
场景是 ECS 框架的核心容器，提供：
|
||||
- 实体的创建、管理和销毁
|
||||
- 系统的注册和执行调度
|
||||
- 组件的存储和查询
|
||||
- 事件系统支持
|
||||
- 性能监控和调试信息
|
||||
|
||||
## 创建场景
|
||||
|
||||
### 继承 Scene 类
|
||||
|
||||
**推荐做法：继承 Scene 类来创建自定义场景**
|
||||
|
||||
```typescript
|
||||
import { Scene, EntitySystem } from '@esengine/ecs-framework';
|
||||
|
||||
class GameScene extends Scene {
|
||||
protected initialize(): void {
|
||||
// 设置场景名称
|
||||
this.name = "GameScene";
|
||||
|
||||
// 添加系统
|
||||
this.addSystem(new MovementSystem());
|
||||
this.addSystem(new RenderSystem());
|
||||
this.addSystem(new PhysicsSystem());
|
||||
|
||||
// 创建初始实体
|
||||
this.createInitialEntities();
|
||||
}
|
||||
|
||||
private createInitialEntities(): void {
|
||||
// 创建玩家
|
||||
const player = this.createEntity("Player");
|
||||
player.addComponent(new Position(400, 300));
|
||||
player.addComponent(new Health(100));
|
||||
player.addComponent(new PlayerController());
|
||||
|
||||
// 创建敌人
|
||||
for (let i = 0; i < 5; i++) {
|
||||
const enemy = this.createEntity(`Enemy_${i}`);
|
||||
enemy.addComponent(new Position(Math.random() * 800, Math.random() * 600));
|
||||
enemy.addComponent(new Health(50));
|
||||
enemy.addComponent(new EnemyAI());
|
||||
}
|
||||
}
|
||||
|
||||
public onStart(): void {
|
||||
console.log("游戏场景已启动");
|
||||
// 场景启动时的逻辑
|
||||
}
|
||||
|
||||
public unload(): void {
|
||||
console.log("游戏场景已卸载");
|
||||
// 场景卸载时的清理逻辑
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 使用场景配置
|
||||
|
||||
```typescript
|
||||
import { ISceneConfig } from '@esengine/ecs-framework';
|
||||
|
||||
const config: ISceneConfig = {
|
||||
name: "MainGame",
|
||||
enableEntityDirectUpdate: false
|
||||
};
|
||||
|
||||
class ConfiguredScene extends Scene {
|
||||
constructor() {
|
||||
super(config);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## 场景生命周期
|
||||
|
||||
场景提供了完整的生命周期管理：
|
||||
|
||||
```typescript
|
||||
class ExampleScene extends Scene {
|
||||
protected initialize(): void {
|
||||
// 场景初始化：设置系统和初始实体
|
||||
console.log("场景初始化");
|
||||
}
|
||||
|
||||
public onStart(): void {
|
||||
// 场景开始运行：游戏逻辑开始执行
|
||||
console.log("场景开始运行");
|
||||
}
|
||||
|
||||
public unload(): void {
|
||||
// 场景卸载：清理资源
|
||||
console.log("场景卸载");
|
||||
}
|
||||
}
|
||||
|
||||
// 使用场景（由框架自动管理生命周期）
|
||||
const scene = new ExampleScene();
|
||||
// 场景的 initialize(), begin(), update(), end() 由框架自动调用
|
||||
```
|
||||
|
||||
## 实体管理
|
||||
|
||||
### 创建实体
|
||||
|
||||
```typescript
|
||||
class EntityScene extends Scene {
|
||||
createGameEntities(): void {
|
||||
// 创建单个实体
|
||||
const player = this.createEntity("Player");
|
||||
|
||||
// 批量创建实体（高性能）
|
||||
const bullets = this.createEntities(100, "Bullet");
|
||||
|
||||
// 为批量创建的实体添加组件
|
||||
bullets.forEach((bullet, index) => {
|
||||
bullet.addComponent(new Position(index * 10, 100));
|
||||
bullet.addComponent(new Velocity(Math.random() * 200 - 100, -300));
|
||||
});
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 查找实体
|
||||
|
||||
```typescript
|
||||
class SearchScene extends Scene {
|
||||
findEntities(): void {
|
||||
// 按名称查找
|
||||
const player = this.findEntity("Player");
|
||||
const player2 = this.getEntityByName("Player"); // 别名方法
|
||||
|
||||
// 按 ID 查找
|
||||
const entity = this.findEntityById(123);
|
||||
|
||||
// 按标签查找
|
||||
const enemies = this.findEntitiesByTag(2);
|
||||
const enemies2 = this.getEntitiesByTag(2); // 别名方法
|
||||
|
||||
if (player) {
|
||||
console.log(`找到玩家: ${player.name}`);
|
||||
}
|
||||
|
||||
console.log(`找到 ${enemies.length} 个敌人`);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 销毁实体
|
||||
|
||||
```typescript
|
||||
class DestroyScene extends Scene {
|
||||
cleanupEntities(): void {
|
||||
// 销毁所有实体
|
||||
this.destroyAllEntities();
|
||||
|
||||
// 单个实体的销毁通过实体本身
|
||||
const enemy = this.findEntity("Enemy_1");
|
||||
if (enemy) {
|
||||
enemy.destroy(); // 实体会自动从场景中移除
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## 系统管理
|
||||
|
||||
### 添加和移除系统
|
||||
|
||||
```typescript
|
||||
class SystemScene extends Scene {
|
||||
protected initialize(): void {
|
||||
// 添加系统
|
||||
const movementSystem = new MovementSystem();
|
||||
this.addSystem(movementSystem);
|
||||
|
||||
// 设置系统更新顺序
|
||||
movementSystem.updateOrder = 1;
|
||||
|
||||
// 添加更多系统
|
||||
this.addSystem(new PhysicsSystem());
|
||||
this.addSystem(new RenderSystem());
|
||||
}
|
||||
|
||||
public removeUnnecessarySystems(): void {
|
||||
// 获取系统
|
||||
const physicsSystem = this.getEntityProcessor(PhysicsSystem);
|
||||
|
||||
// 移除系统
|
||||
if (physicsSystem) {
|
||||
this.removeSystem(physicsSystem);
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 系统访问
|
||||
|
||||
```typescript
|
||||
class SystemAccessScene extends Scene {
|
||||
public pausePhysics(): void {
|
||||
const physicsSystem = this.getEntityProcessor(PhysicsSystem);
|
||||
if (physicsSystem) {
|
||||
physicsSystem.enabled = false;
|
||||
}
|
||||
}
|
||||
|
||||
public getAllSystems(): EntitySystem[] {
|
||||
return this.systems; // 获取所有系统
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## 事件系统
|
||||
|
||||
场景内置了类型安全的事件系统：
|
||||
|
||||
```typescript
|
||||
class EventScene extends Scene {
|
||||
protected initialize(): void {
|
||||
// 监听事件
|
||||
this.eventSystem.on('player_died', this.onPlayerDied.bind(this));
|
||||
this.eventSystem.on('enemy_spawned', this.onEnemySpawned.bind(this));
|
||||
this.eventSystem.on('level_complete', this.onLevelComplete.bind(this));
|
||||
}
|
||||
|
||||
private onPlayerDied(data: any): void {
|
||||
console.log('玩家死亡事件');
|
||||
// 处理玩家死亡
|
||||
}
|
||||
|
||||
private onEnemySpawned(data: any): void {
|
||||
console.log('敌人生成事件');
|
||||
// 处理敌人生成
|
||||
}
|
||||
|
||||
private onLevelComplete(data: any): void {
|
||||
console.log('关卡完成事件');
|
||||
// 处理关卡完成
|
||||
}
|
||||
|
||||
public triggerGameEvent(): void {
|
||||
// 发送事件
|
||||
this.eventSystem.emitSync('custom_event', {
|
||||
message: "这是自定义事件",
|
||||
timestamp: Date.now()
|
||||
});
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## 场景统计和调试
|
||||
|
||||
### 获取场景统计
|
||||
|
||||
```typescript
|
||||
class StatsScene extends Scene {
|
||||
public showStats(): void {
|
||||
const stats = this.getStats();
|
||||
console.log(`实体数量: ${stats.entityCount}`);
|
||||
console.log(`系统数量: ${stats.processorCount}`);
|
||||
console.log('组件存储统计:', stats.componentStorageStats);
|
||||
}
|
||||
|
||||
public showDebugInfo(): void {
|
||||
const debugInfo = this.getDebugInfo();
|
||||
console.log('场景调试信息:', debugInfo);
|
||||
|
||||
// 显示所有实体信息
|
||||
debugInfo.entities.forEach(entity => {
|
||||
console.log(`实体 ${entity.name}(${entity.id}): ${entity.componentCount} 个组件`);
|
||||
console.log('组件类型:', entity.componentTypes);
|
||||
});
|
||||
|
||||
// 显示所有系统信息
|
||||
debugInfo.processors.forEach(processor => {
|
||||
console.log(`系统 ${processor.name}: 处理 ${processor.entityCount} 个实体`);
|
||||
});
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## 场景集成到框架
|
||||
|
||||
场景可以通过两种方式运行：
|
||||
|
||||
### 1. 简单的单场景应用
|
||||
|
||||
```typescript
|
||||
import { Core } from '@esengine/ecs-framework';
|
||||
|
||||
// 创建游戏场景
|
||||
class GameScene extends Scene {
|
||||
protected initialize(): void {
|
||||
this.name = "GameScene";
|
||||
this.addSystem(new MovementSystem());
|
||||
this.addSystem(new RenderSystem());
|
||||
}
|
||||
}
|
||||
|
||||
// 启动游戏
|
||||
Core.create();
|
||||
const gameScene = new GameScene();
|
||||
Core.setScene(gameScene);
|
||||
```
|
||||
|
||||
### 2. 复杂的多场景应用
|
||||
|
||||
```typescript
|
||||
import { WorldManager } from '@esengine/ecs-framework';
|
||||
|
||||
// 获取WorldManager实例
|
||||
const worldManager = WorldManager.getInstance();
|
||||
|
||||
// 创建World
|
||||
const gameWorld = worldManager.createWorld('game', {
|
||||
name: 'MainGame',
|
||||
maxScenes: 5
|
||||
});
|
||||
|
||||
// 在World中创建场景
|
||||
const menuScene = gameWorld.createScene('menu', new MenuScene());
|
||||
const gameScene = gameWorld.createScene('game', new GameScene());
|
||||
|
||||
// 激活场景
|
||||
gameWorld.setSceneActive('menu', true);
|
||||
```
|
||||
|
||||
## 多场景管理
|
||||
|
||||
在World中可以管理多个场景，通过激活/停用来切换：
|
||||
|
||||
```typescript
|
||||
class GameWorld extends World {
|
||||
private menuScene: Scene;
|
||||
private gameScene: Scene;
|
||||
private gameOverScene: Scene;
|
||||
|
||||
public initialize(): void {
|
||||
// 创建多个场景
|
||||
this.menuScene = this.createScene('menu', new MenuScene());
|
||||
this.gameScene = this.createScene('game', new GameScene());
|
||||
this.gameOverScene = this.createScene('gameover', new GameOverScene());
|
||||
|
||||
// 设置初始场景
|
||||
this.showMenu();
|
||||
}
|
||||
|
||||
public showMenu(): void {
|
||||
this.deactivateAllScenes();
|
||||
this.setSceneActive('menu', true);
|
||||
}
|
||||
|
||||
public startGame(): void {
|
||||
this.deactivateAllScenes();
|
||||
this.setSceneActive('game', true);
|
||||
}
|
||||
|
||||
public showGameOver(): void {
|
||||
this.deactivateAllScenes();
|
||||
this.setSceneActive('gameover', true);
|
||||
}
|
||||
|
||||
private deactivateAllScenes(): void {
|
||||
this.setSceneActive('menu', false);
|
||||
this.setSceneActive('game', false);
|
||||
this.setSceneActive('gameover', false);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## 与 World 的关系
|
||||
|
||||
Scene 的运行架构层次：
|
||||
|
||||
```typescript
|
||||
// Core -> WorldManager -> World -> Scene -> EntitySystem -> Entity -> Component
|
||||
|
||||
// 1. 简单应用：Core直接管理单个Scene
|
||||
Core.setScene(new GameScene());
|
||||
|
||||
// 2. 复杂应用：WorldManager管理多个World，每个World管理多个Scene
|
||||
const worldManager = WorldManager.getInstance();
|
||||
const world = worldManager.createWorld('gameWorld');
|
||||
const scene = world.createScene('mainScene', new GameScene());
|
||||
world.setSceneActive('mainScene', true);
|
||||
```
|
||||
|
||||
## 最佳实践
|
||||
|
||||
### 1. 场景职责分离
|
||||
|
||||
```typescript
|
||||
// ✅ 好的场景设计 - 职责清晰
|
||||
class MenuScene extends Scene {
|
||||
// 只处理菜单相关逻辑
|
||||
}
|
||||
|
||||
class GameScene extends Scene {
|
||||
// 只处理游戏玩法逻辑
|
||||
}
|
||||
|
||||
class InventoryScene extends Scene {
|
||||
// 只处理物品栏逻辑
|
||||
}
|
||||
|
||||
// ❌ 避免的场景设计 - 职责混乱
|
||||
class MegaScene extends Scene {
|
||||
// 包含菜单、游戏、物品栏等所有逻辑
|
||||
}
|
||||
```
|
||||
|
||||
### 2. 合理的系统组织
|
||||
|
||||
```typescript
|
||||
class OrganizedScene extends Scene {
|
||||
protected initialize(): void {
|
||||
// 按功能和依赖关系添加系统
|
||||
this.addInputSystems();
|
||||
this.addLogicSystems();
|
||||
this.addRenderSystems();
|
||||
}
|
||||
|
||||
private addInputSystems(): void {
|
||||
this.addSystem(new InputSystem());
|
||||
}
|
||||
|
||||
private addLogicSystems(): void {
|
||||
this.addSystem(new MovementSystem());
|
||||
this.addSystem(new PhysicsSystem());
|
||||
this.addSystem(new CollisionSystem());
|
||||
}
|
||||
|
||||
private addRenderSystems(): void {
|
||||
this.addSystem(new RenderSystem());
|
||||
this.addSystem(new UISystem());
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 3. 资源管理
|
||||
|
||||
```typescript
|
||||
class ResourceScene extends Scene {
|
||||
private textures: Map<string, any> = new Map();
|
||||
private sounds: Map<string, any> = new Map();
|
||||
|
||||
protected initialize(): void {
|
||||
this.loadResources();
|
||||
}
|
||||
|
||||
private loadResources(): void {
|
||||
// 加载场景所需资源
|
||||
}
|
||||
|
||||
public unload(): void {
|
||||
// 清理资源
|
||||
this.textures.clear();
|
||||
this.sounds.clear();
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 4. 事件处理规范
|
||||
|
||||
```typescript
|
||||
class EventHandlingScene extends Scene {
|
||||
protected initialize(): void {
|
||||
// 集中管理事件监听
|
||||
this.setupEventListeners();
|
||||
}
|
||||
|
||||
private setupEventListeners(): void {
|
||||
this.eventSystem.on('game_pause', this.onGamePause.bind(this));
|
||||
this.eventSystem.on('game_resume', this.onGameResume.bind(this));
|
||||
this.eventSystem.on('player_input', this.onPlayerInput.bind(this));
|
||||
}
|
||||
|
||||
private onGamePause(): void {
|
||||
// 暂停游戏逻辑
|
||||
this.systems.forEach(system => {
|
||||
if (system instanceof GameLogicSystem) {
|
||||
system.enabled = false;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
private onGameResume(): void {
|
||||
// 恢复游戏逻辑
|
||||
this.systems.forEach(system => {
|
||||
if (system instanceof GameLogicSystem) {
|
||||
system.enabled = true;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
private onPlayerInput(data: any): void {
|
||||
// 处理玩家输入
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
场景是 ECS 框架的核心容器，正确使用场景管理能让你的游戏架构更加清晰、模块化和易于维护。
|
||||
Reference in New Issue
Block a user