TmMolStar/src/mol-math/linear-algebra/_spec/vec3.spec.ts

/**
 * Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
 *
 * @author Sebastian Bittrich <sebastian.bittrich@rcsb.org>
 */

import { Vec3 } from '../3d/vec3';

describe('vec3', () => {
    const vec1 = Vec3.create(1, 2, 3);
    const vec2 = Vec3.create(2, 3, 1);
    const orthVec1 = Vec3.create(0, 1, 0);
    const orthVec2 = Vec3.create(1, 0, 0);

    it('angle calculation', () => {
        expect(Vec3.angle(vec1, vec1) * 360 / (2 * Math.PI)).toBe(0.0);
        expect(Vec3.angle(orthVec1, orthVec2) * 360 / (2 * Math.PI)).toBe(90.0);
        expect(Vec3.angle(vec1, vec2)).toBeCloseTo(0.666946);
    });
});