/**
 * Sampling kernels.
 *
 * @category Math
 */
export class Kernel {
    /**
     * Generate a set of points distributed in a series of concentric rings around the origin. The
     * spacing between points is determined by the number of points in the first ring, and subsequent
     * rings maintain this spacing by adjusting their number of points accordingly.
     *
     * @param {number} numRings - The number of concentric rings to generate.
     * @param {number} numPoints - The number of points in the first ring.
     * @returns {number[]} An array where each point is represented by two consecutive numbers (x, y).
     * @example
     * // Generate a kernel with 3 rings and 8 points in the first ring
     * const kernel = pc.Kernel.concentric(3, 8);
     * // kernel is a flat array: [x0, y0, x1, y1, x2, y2, ...]
     */
    static concentric(numRings: number, numPoints: number): number[];
}