import type { ReadonlyVec } from "@thi.ng/vectors";
import type { Circle } from "./api/circle.js";
/**
 * Inverts circle `c` in regards to reference circle `ref`. Mutates `c` in place
 * and returns it.
 *
 * @remarks
 * Reference:
 * https://en.wikipedia.org/wiki/Inversive_geometry#Inversion_in_a_circle
 *
 * @param c
 * @param ref
 */
export declare const invertCircle: (c: Circle, ref: Circle) => Circle;
/**
 * Applies inversion of point `p` in regards to reference circle `ref`.
 *
 * @remarks
 * From Wikipedia: "...for a point inside the circle, the nearer the point to
 * the center, the further away its transformation. While for any point (inside
 * or outside the circle), the nearer the point to the circle, the closer its
 * transformation."
 *
 * https://en.wikipedia.org/wiki/Inversive_geometry#Inversion_in_a_circle
 *
 * @param p
 * @param ref
 */
export declare const invertCirclePoint: (p: ReadonlyVec, ref: Circle) => import("@thi.ng/vectors").Vec<number>;
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