/**
 * 2D Operations using Manifold CrossSection
 *
 * Implements 2D operations like offset, polygon creation, and conversion
 * between 2D CrossSection and 3D Manifold objects.
 */
import type { ManifoldObject } from "./types";
export type CrossSectionObject = any;
/**
 * Create a 2D square/rectangle
 */
export declare function createSquare2D(size: number | [number, number], center?: boolean): CrossSectionObject;
/**
 * Create a 2D circle
 */
export declare function createCircle2D(radius: number, segments?: number): CrossSectionObject;
/**
 * Create a 2D polygon from points
 */
export declare function createPolygon2D(points: [number, number][]): CrossSectionObject;
/**
 * Apply offset to a 2D shape
 * Positive delta expands, negative delta contracts
 */
export declare function offset2D(crossSection: CrossSectionObject, delta: number, joinType?: "round" | "miter" | "square", miterLimit?: number, circularSegments?: number): CrossSectionObject;
/**
 * Union of multiple 2D shapes
 */
export declare function union2D(crossSections: CrossSectionObject[]): CrossSectionObject;
/**
 * Difference of 2D shapes (first minus rest)
 */
export declare function difference2D(crossSections: CrossSectionObject[]): CrossSectionObject;
/**
 * Intersection of 2D shapes
 */
export declare function intersection2D(crossSections: CrossSectionObject[]): CrossSectionObject;
/**
 * Convex hull of 2D shapes
 */
export declare function hull2D(crossSections: CrossSectionObject[]): CrossSectionObject;
/**
 * Translate a 2D shape
 */
export declare function translate2D(crossSection: CrossSectionObject, offset: [number, number]): CrossSectionObject;
/**
 * Scale a 2D shape
 */
export declare function scale2D(crossSection: CrossSectionObject, factors: [number, number] | number): CrossSectionObject;
/**
 * Rotate a 2D shape (degrees)
 */
export declare function rotate2D(crossSection: CrossSectionObject, degrees: number): CrossSectionObject;
/**
 * Mirror a 2D shape
 */
export declare function mirror2D(crossSection: CrossSectionObject, normal: [number, number]): CrossSectionObject;
/**
 * Linear extrude a 2D shape to 3D
 */
export declare function linearExtrude2D(crossSection: CrossSectionObject, height: number, nDivisions?: number, twistDegrees?: number, scaleTop?: [number, number], center?: boolean): ManifoldObject;
/**
 * Revolve a 2D shape around the Y axis to create 3D
 */
export declare function revolve2D(crossSection: CrossSectionObject, circularSegments?: number, revolveDegrees?: number): ManifoldObject;
/**
 * Project a 3D manifold to 2D (along Z axis)
 */
export declare function project3Dto2D(manifold: ManifoldObject): CrossSectionObject;
/**
 * Slice a 3D manifold at Z=0 to get 2D cross section
 */
export declare function slice3Dto2D(manifold: ManifoldObject, height?: number): CrossSectionObject;
/**
 * Get area of a 2D shape
 */
export declare function area2D(crossSection: CrossSectionObject): number;
/**
 * Check if 2D shape is empty
 */
export declare function isEmpty2D(crossSection: CrossSectionObject): boolean;
/**
 * Get bounds of 2D shape
 */
export declare function bounds2D(crossSection: CrossSectionObject): {
    min: [number, number];
    max: [number, number];
};
/**
 * Convert CrossSection to polygon points (for debugging/export)
 */
export declare function toPolygons2D(crossSection: CrossSectionObject): [number, number][][];
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