/**
 * Scale operations for 3D elements
 * Core logic extracted from UI-dependent code
 */
import { OutlinerElement } from '../geometry/outliner_element';
import { Group } from '../geometry/group';
import { Vector3 } from './transform';
export interface ScaleOptions {
    scale: number;
    origin: Vector3;
    axis: {
        x: boolean;
        y: boolean;
        z: boolean;
    };
    integerSize?: boolean;
}
export interface ElementSnapshot {
    from?: Vector3;
    to?: Vector3;
    origin?: Vector3;
    vertices?: Record<string, Vector3>;
}
/**
 * Create a snapshot of element state before scaling
 */
export declare function createElementSnapshot(element: OutlinerElement): ElementSnapshot;
/**
 * Restore element from snapshot
 */
export declare function restoreElementFromSnapshot(element: OutlinerElement, snapshot: ElementSnapshot): void;
/**
 * Scale an element based on options
 */
export declare function scaleElement(element: OutlinerElement, options: ScaleOptions, snapshot?: ElementSnapshot): void;
/**
 * Scale multiple elements
 */
export declare function scaleElements(elements: OutlinerElement[], options: ScaleOptions, snapshots?: Map<OutlinerElement, ElementSnapshot>): Map<OutlinerElement, ElementSnapshot>;
/**
 * Scale groups
 */
export declare function scaleGroups(groups: Group[], options: ScaleOptions, snapshots?: Map<Group, ElementSnapshot>): Map<Group, ElementSnapshot>;
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