frame.akima/dist/Akima.test.js

A package for Akima interpolation

// import { test, expect, describe } from 'vitest';
import { Point } from './Point';
import { createAkimaRadii } from './Akima';
import { Nidek } from './nidek/Nidek';
describe('Akima', () => {
    test('create an Akima', () => {
        const universeCenter = new Point(0, 0);
        const offset = 200;
        const points = [
            new Point(0, offset, universeCenter),
            new Point(0, -offset, universeCenter),
            new Point(offset, 0, universeCenter),
            new Point(-offset, 0, universeCenter),
        ];
        const expectedPoints = [
            new Point(200, 0, universeCenter),
            new Point(184.776, 76.537, universeCenter),
            new Point(141.421, 141.421, universeCenter),
            new Point(76.537, 184.776, universeCenter),
            new Point(0, 200, universeCenter),
            new Point(-76.537, 184.776, universeCenter),
            new Point(-141.421, 141.421, universeCenter),
            new Point(-184.776, 76.537, universeCenter),
            new Point(-200, 0, universeCenter),
            new Point(-184.776, -76.537, universeCenter),
            new Point(-141.421, -141.421, universeCenter),
            new Point(-76.537, -184.776, universeCenter),
            new Point(0, -200, universeCenter),
            new Point(76.537, -184.776, universeCenter),
            new Point(141.421, -141.421, universeCenter),
            new Point(184.776, -76.537, universeCenter),
        ];
        createAkimaRadii(points.map((point) => ({ x: point.X, y: point.Y })), { x: universeCenter.X, y: universeCenter.Y }, 16).forEach((point, index) => {
            // console.log(`new Point(${point.X}, ${point.Y}, universeCenter),`);
            // console.log(`expect(point.X).toEqual(${point.X});`);
            expect(point.x).toBeCloseTo(expectedPoints[index].X, 3);
            expect(point.y).toBeCloseTo(expectedPoints[index].Y, 3);
            // expect(point.Y).toBeCloseTo(0, 1);
        });
    });
    test('create an Akima 2', () => {
        const universeCenter = new Point(0, 0);
        const points = [
            new Point(200, 0, universeCenter),
            new Point(0, 200, universeCenter),
            new Point(-200, 0, universeCenter),
            new Point(0, -200, universeCenter),
            new Point(102.515625, 100.203125, universeCenter),
        ];
        const scaleFactor = 10;
        const akimaKoords = createAkimaRadii(points.map((point) => ({
            x: point.X / scaleFactor,
            y: point.Y / scaleFactor,
        })), { x: universeCenter.X, y: universeCenter.Y }, 1000);
        console.log(`universeCenter: [${universeCenter.X}, ${universeCenter.Y}]`);
        try {
            const nid = Nidek.createStringFromCoords(akimaKoords);
            throw new Error('This code path should not be reached because the function Nidek.createStringFromCoords(..) should throw an error');
        }
        catch (e) {
            expect(e).toBeInstanceOf(Error);
            console.error(`Error creating Nidek string: ${e}`);
        }
    });
});