38 lines
996 B
TypeScript
38 lines
996 B
TypeScript
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import * as GA from "./ga";
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import * as GALine from "./galines";
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import { Point, Line, join } from "./ga";
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/**
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* TODO: docs
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*/
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export function from([x, y]: readonly [number, number]): Point {
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return [0, 0, 0, 0, y, x, 1, 0];
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}
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export function toTuple(point: Point): [number, number] {
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return [point[5], point[4]];
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}
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export function abs(point: Point): Point {
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return [0, 0, 0, 0, Math.abs(point[4]), Math.abs(point[5]), 1, 0];
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}
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export function intersect(line1: Line, line2: Line): Point {
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return GA.normalized(GA.meet(line1, line2));
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}
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// Projects `point` onto the `line`.
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// The returned point is the closest point on the `line` to the `point`.
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export function project(point: Point, line: Line): Point {
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return intersect(GALine.orthogonal(line, point), line);
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}
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export function distance(point1: Point, point2: Point): number {
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return GA.norm(join(point1, point2));
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}
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export function distanceToLine(point: Point, line: Line): number {
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return GA.joinScalar(point, line);
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}
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