export declare let DEFAULT_SAMPLES: number;
/**
 * Sets the number of {@link DEFAULT_SAMPLES} for various operations.
 *
 * @param n
 */
export declare const setDefaultSamples: (n: number) => number;
export interface SamplingOpts {
    /**
     * Number of points to sample & return. Defaults to the implementing
     * type's default samples if neither this nor `theta` option is
     * given.
     */
    num: number;
    /**
     * Defines the target angle between sampled points. If greater than the
     * actual range of the arc, only the two end points will be returned at
     * most. This option is used to derive a `num` value and takes priority if
     * `num` is given as well.
     *
     * This option is useful to adapt the sampling based on angular resolution,
     * rather than a fixed number of samples.
     *
     * Note: Currently, in thi.ng/geom this option is only used for resampling
     * arcs, circles or ellipses.
     */
    theta: number;
    /**
     * Approximate desired distance between sampled result points. If
     * given, takes priority over the `num` option, but the latter MIGHT
     * be used as part of the sampling process (implementation
     * specific).
     */
    dist: number;
    /**
     * If `true`, the shape's end point will be included in the result
     * array. The default setting for open geometries is `true`, for
     * closed ones `false`. This option has no influence on any internal
     * resolution calculation.
     *
     * For open geometry this option is useful to when re-sampling paths
     * of consecutive segments, where the end points of each segment
     * coincide with the start points of the next segment. For all but
     * the last segment, this option should be `false` and so can be
     * used to avoid duplicate vertices in the concatenated result.
     *
     * When sampling closed shapes, enabling this option will include an
     * extra point (start), i.e. if the `num` option was given, results
     * in `num+1` points.
     */
    last: boolean;
    /**
     * Optional parametric (normalized) start position.
     *
     * @remarks
     * Note: Currently, in thi.ng/geom this option is only used for resampling
     * circles or ellipses.
     *
     * @defaultValue 0
     */
    start: number;
}
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