import type { Node } from '../Node';
import type { Group } from '../shapes/Group';
export interface Bounds {
    x: number;
    y: number;
    width: number;
    height: number;
}
/** World-space axis-aligned bounds for a node (with optional padding). */
export declare function getWorldBounds(node: Node, padding?: number): Bounds;
/** True if node or any descendant is dirty. */
export declare function isSubtreeDirty(node: Node): boolean;
/** Collect all listening leaf nodes for spatial indexing. */
export declare function collectHitTargets(root: Group, out?: Node[]): Node[];
/** Count nodes in subtree. */
export declare function countNodes(root: Group): number;