@thi.ng/geom-clip-line/liang-barsky.d.ts

2D line clipping (Liang-Barsky)

import type { FnU8, Maybe, Tuple } from "@thi.ng/api";
import type { ReadonlyVec, Vec } from "@thi.ng/vectors";
/**
 * Performs Liang-Barsky clipping of the line segment with endpoints `a`, `b`
 * against the clipping rect defined by `min` and `max`. The optional `ca` and
 * `cb` vectors can be given to store the result (clipped points). If omitted
 * creates new vectors. Returns a tuple of `[ca, cb, a, b]`, where the latter
 * two values represent the normalized distances of the clipped points relative
 * to original given line segment. Returns `undefined` iff the line lies
 * completely outside the rect.
 *
 * - https://en.wikipedia.org/wiki/Liang%E2%80%93Barsky_algorithm
 * - https://github.com/thi-ng/c-thing/blob/develop/src/geom/clip/liangbarsky.c
 *
 * @param a - line endpoint
 * @param b - line endpoint
 * @param min - bbox min
 * @param max - bbox max
 * @param ca - result A
 * @param cb - result B
 */
export declare const liangBarsky2: (a: ReadonlyVec, b: ReadonlyVec, min: ReadonlyVec, max: ReadonlyVec, ca?: Vec, cb?: Vec) => Maybe<[Vec, Vec, number, number]>;
/**
 * Same as {@link liangBarsky2} but for non-vector arguments.
 *
 * @param ax -
 * @param ay -
 * @param bx -
 * @param by -
 * @param minx -
 * @param miny -
 * @param maxx -
 * @param maxy -
 */
export declare const liangBarsky2Raw: FnU8<number, Maybe<Tuple<number, 6>>>;
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