import { ContextManager, Observable } from '@zcomponent/core';
import { CSS } from '@zcomponent/html/lib/CSS';
import { ScaleToFit, AlignTransform, DefaultEnvironment, ShadowPlane, GLTF, MouseOrbit, Group, DirectionalLight, PerspectiveCamera } from '../index';
interface ModelPreviewConstructorProps {
    /** @zprop
     * @zvalues files *.+(glb|gltf)
     */
    comparisonSource?: string;
    /** @zprop
     * @zvalues files *.+(glb|gltf)
     */
    source: string;
}
/**
 * @zcomponent
 */
export declare class ModelPreview extends Group {
    css: CSS;
    scaleToFit: ScaleToFit;
    alignTransform: AlignTransform;
    perspectiveCamera: PerspectiveCamera;
    defaults: Group;
    directionalLight: DirectionalLight;
    defaultEnvironment: DefaultEnvironment;
    shadowPlane: ShadowPlane;
    private overlayContainer;
    private animationsList;
    private morphTargetsList;
    private materialsList;
    gltf: GLTF;
    gltfComparison?: GLTF;
    mouseOrbitBehavior: MouseOrbit;
    private _source?;
    private _comparisonSource?;
    /**
     * @zui
     * @ztype proportion
     * @zdefault 0.5
     * @zgroup Comparison
     */
    sliderPosition: Observable<number, never>;
    private _isComparisonMode;
    private _leftPlane;
    private _rightPlane;
    private _renderer;
    private _camera;
    private _originalClippingEnabled;
    private _separatorLine;
    private compressionInfoDisplay;
    private readonly _enableCameraCaching;
    private _originalModelHash;
    private _frameCount;
    private _lastSaveFrame;
    private readonly SAVE_INTERVAL_FRAMES;
    constructor(contextManager: ContextManager, constructorProps: ModelPreviewConstructorProps);
    setComparisonFromArrayBuffer: (buffer: ArrayBuffer) => Promise<void>;
    private _updateComparisonModel;
    private _setupComparisonMode;
    private _setupCameraContext;
    private _frame;
    private _viewMode;
    private _comparisonViewMode;
    private _wireframeMaterial;
    private _normalMaterial;
    private _uvMaterial;
    private _originalMaterials;
    private _viewModeSelect;
    private _comparisonRadios;
    setToolbarDOM(toolbar: HTMLElement): void;
    private _updateViewMode;
    private _applyMaterialOverride;
    private _createOverrideMaterial;
    private _createComparisonToggle;
    private _setComparisonViewMode;
    private _updateComparisonViewMode;
    private _showOnlyOriginal;
    private _showOnlyOptimised;
    private _showSplitComparison;
    private _hideSeparatorLine;
    private _showSeparatorLine;
    private _resetCamera;
    private createHTMLOverlay;
    private _createSeparatorLine;
    private _createComparisonInfoDisplays;
    private _setupDragHandling;
    private _updateSeparatorPosition;
    private onLoaded;
    private _setupCameraCaching;
    private _initializeCameraPosition;
    private restoreFromState;
    private updateAnimationsList;
    private playAnimation;
    private updateMorphTargetsList;
    private updateMorphTarget;
    private updateMaterialsList;
    private updateComparisonStats;
    private calculatePolyCount;
    private _calculateTextureMemoryWithOriginalMaterials;
    private formatBytes;
    private getModelSizes;
    private saveState;
    private saveCameraState;
    private saveViewState;
    private restoreCameraState;
    private _updateClipping;
    private _applyClippingPlanes;
    private _clearClippingPlanes;
    private setupProperties;
    private setupHierarchy;
    dispose(): never;
}
export {};