@thi.ng/geom-resample/axis.d.ts

Customizable nD polyline interpolation, re-sampling, splitting & nearest point computation

import type { ReadonlyVec } from "@thi.ng/vectors";
/**
 * Samples 2D polyline at uniform step distance in `[x1..x2]` interval along
 * X-axis. Returns array of sampled points.
 *
 * @remarks
 * The polyline is assumed to fully cover the given X interval, no gaps are
 * allowed (or checked for). Sampling is done via ray-line intersection with the
 * ray cast into Y+ direction, starting at given `startY`.
 *
 * Also see {@link sampleUniformY}.
 *
 * @example
 * ```ts tangle:../export/sample-uniform.ts
 * import { sampleUniformX } from "@thi.ng/geom-resample";
 *
 * console.log(
 *   sampleUniformX([[0, 0], [3, 5], [5, 2]], 0, 5)
 * );
 * // [
 * //   [ 0, 0 ],
 * //   [ 1, 1.666... ],
 * //   [ 2, 3.333... ],
 * //   [ 3, 5 ],
 * //   [ 4, 3.5 ],
 * //   [ 5, 2 ]
 * // ]
 * ```
 *
 * @param pts
 * @param x1
 * @param x2
 * @param step
 * @param startY
 */
export declare const sampleUniformX: (pts: ReadonlyVec[], x1: number, x2: number, step?: number, startY?: number) => ReadonlyVec[];
/**
 * Similar to {@link sampleUniformX}, but samples 2D polyline at uniform step
 * distance in `[y1..y2]` interval along Y-axis. Returns array of sampled
 * points.
 *
 * @param pts
 * @param y1
 * @param y2
 * @param step
 * @param startX
 */
export declare const sampleUniformY: (pts: ReadonlyVec[], y1: number, y2: number, step?: number, startX?: number) => ReadonlyVec[];
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