@jscad/modeling/src/maths/line2/distanceToPoint.test.js

Constructive Solid Geometry (CSG) Library for JSCAD

const test = require('ava')
const { distanceToPoint, create, fromPoints } = require('./index')

const { nearlyEqual } = require('../../../test/helpers/index')
const { EPS } = require('../constants')

test('line2: distanceToPoint() should return proper values', (t) => {
  const line1 = create()
  const dis1 = distanceToPoint(line1, [0, 0])
  nearlyEqual(t, dis1, 0, EPS)
  const dis2 = distanceToPoint(line1, [1, 0])
  nearlyEqual(t, dis2, 0, EPS)
  const dis3 = distanceToPoint(line1, [0, 1])
  nearlyEqual(t, dis3, 1, EPS)

  const line2 = fromPoints(create(), [-5, 4], [5, -6])
  const dis4 = distanceToPoint(line2, [0, 0])
  nearlyEqual(t, dis4, 0.7071067690849304, EPS)
  const dis5 = distanceToPoint(line2, [1, 0])
  nearlyEqual(t, dis5, 1.4142135381698608, EPS)
  const dis6 = distanceToPoint(line2, [2, 0])
  nearlyEqual(t, dis6, 2.1213203072547913, EPS)
  const dis7 = distanceToPoint(line2, [3, 0])
  nearlyEqual(t, dis7, 2.8284270763397217, EPS)
  const dis8 = distanceToPoint(line2, [4, 0])
  nearlyEqual(t, dis8, 3.535533845424652, EPS)
  const dis9 = distanceToPoint(line2, [5, 0])
  nearlyEqual(t, dis9, 4.2426406145095825, EPS)

  t.true(true)
})