import { ExtensionBase } from '../ExtensionBase.ts';
import { SceneLevel } from '../../scene/SceneLoader';
/**
 * Extension for controlling clipping planes based on model floor levels.
 * Follows the same plane management pattern as {@link SliceExtension}.
 */
export declare class LevelsExtension extends ExtensionBase {
    static getName: () => string;
    private renderManager;
    /** Whether level-based clipping is currently active. */
    isLevelsSliceOn: boolean;
    private bottomPlane;
    private topPlane;
    private levelsPlaneMap;
    /** Fallback top clipping offset (in metres) when the level has no next floor. */
    defaultLevelHeight: number;
    constructor(viewerName: string);
    /**
     * Called when the extension is added to the viewer.
     * @group Hooks
     */
    added(): void;
    /**
     * Called when the extension is removed from the viewer.
     * @group Hooks
     */
    deleted(): void;
    private get sceneManager();
    /**
     * Configures bottom and top clipping planes for the given floor level.
     * @param level - A {@link SceneLevel} object with elevation data.
     */
    sliceByLevel(level: SceneLevel | any): void;
    private applyClipping;
    /** Remove all level clipping planes and reset state. */
    clearClipping(): void;
}
export default LevelsExtension;