Class CameraManagerImpl

packages/camera/src/CameraManager.ts:87–314

 * ```
 */
export class CameraManagerImpl implements ICameraManager {
    private _scene: IScene | null = null;
    private _viewportWidth: number = 800;
    private _viewportHeight: number = 600;
    private _mainCameraEntity: Entity | null = null;
    private _mainCameraEntityDirty: boolean = true;

    /**
     * 设置场景引用
     * Set scene reference
     */
    setScene(scene: IScene | null): void {
        this._scene = scene;
        this._mainCameraEntityDirty = true;
        this._mainCameraEntity = null;
    }

    /**
     * 设置视口尺寸
     * Set viewport size
     */
    setViewportSize(width: number, height: number): void {
        this._viewportWidth = Math.max(1, width);
        this._viewportHeight = Math.max(1, height);
    }

    /**
     * 获取视口宽度
     * Get viewport width
     */
    get viewportWidth(): number {
        return this._viewportWidth;
    }

    /**
     * 获取视口高度
     * Get viewport height
     */
    get viewportHeight(): number {
        return this._viewportHeight;
    }

    /**
     * 获取视口宽高比
     * Get viewport aspect ratio
     */
    get aspectRatio(): number {
        return this._viewportWidth / this._viewportHeight;
    }

    /**
     * 标记主相机需要重新查找
     * Mark main camera as dirty (needs re-lookup)
     */
    invalidateMainCamera(): void {
        this._mainCameraEntityDirty = true;
    }