import { Vector2, Vector3, Line3, Plane } from 'three';
/**
 * Section determines the MRP section of a volume.
 */
export interface Section {
    origin: number[];
    xAxis: number[];
    yAxis: number[];
}
interface SectionVector {
    origin: Vector3;
    xAxis: Vector3;
    yAxis: Vector3;
}
/**
 * Converts the members of Section into Vector3 for easier calculation.
 * It is safe to modify the returned object because all the members are cloned.
 * @param section The input Section object.
 */
export declare function vectorizeSection(section: Section): SectionVector;
export declare function sectionToPlane(section: Section): Plane;
export declare function projectPointOntoSection(section: Section, point: Vector3): Vector2;
export declare function distanceFromPointToSection(section: Section, point: Vector3): number;
/**
 * Performs a parallel translation on a given section.
 */
export declare function translateSection(section: Section, delta: Vector3): Section;
/**
 * Calculates the intersection point of the given line segment and the plane.
 * This does not check if the intersection is within the section
 * (i.e., section is treated as a plane that extends infinitely).
 * @return The intersection point. null if there is no intersection.
 * @deprecated Use toPlane() and intersectLine() instead.
 */
export declare function intersectionOfLineAndPlane(section: Section, line: Line3): Vector3 | null;
/**
 * Returns true if the given point is within the given section.
 */
export declare function intersectionPointWithinSection(section: Section, pointOnSection: Vector3): boolean;
/**
 * Calculates the intersection point of the given line segment and the section.
 * @return The intersection point. null if there is no intersection.
 */
export declare function intersectionOfLineAndSection(section: Section, line: Line3): Vector3 | null;
/**
 * Calculates the intersection line segment of two (finite) sections.
 * @param section1
 * @param section2
 * @returns The intersection line segment
 */
export declare function intersectionOfTwoSections(section1: Section, section2: Section): Line3 | null;
/**
 * Calculates the normal vector of the given section.
 * @param section The section.
 * @returns The calculated normal vector.
 */
export declare function normalVector(section: Section): Vector3;
/**
 * Compare the contents of the two sections.
 * @param a The section to compare.
 * @param b The section to compare.
 * @returns True if the two given Sections are identical.
 */
export declare function sectionEquals(a: Section, b: Section): boolean;
export {};