import { angleTo } from '../../src/Geometry/GeUtils';
import { Vector3 } from "three";
test('俯视图', () =>
{
    //逆时针
    let v = angleTo(new Vector3(1, 0, 0), new Vector3(0, 1, 0), new Vector3(0, 0, 1)); //?
    expect(v).toEqual(Math.PI * 0.5);

    //顺时针
    let v2 = angleTo(new Vector3(0, 1, 0), new Vector3(1, 0, 0), new Vector3(0, 0, 1)); //?
    expect(v2).toEqual(Math.PI * -0.5);
});
test('仰视', () =>
{
    //顺时针
    let v = angleTo(new Vector3(1, 0, 0), new Vector3(0, 1, 0), new Vector3(0, 0, -1)); //?
    expect(v).toEqual(Math.PI * -0.5);
});

test('右视图', () =>
{
    let v = angleTo(new Vector3(0, 0, 1), new Vector3(0, 1, 0), new Vector3(1, 0, 0)); //?
    expect(v).toEqual(Math.PI * -0.5);

    v = angleTo(new Vector3(0, 1, 0), new Vector3(0, 0, 1), new Vector3(1, 0, 0)); //?
    expect(v).toEqual(Math.PI * 0.5);
});

test('0向量', () =>
{
    let v = angleTo(new Vector3(1, 0, 0), new Vector3(0, 0, 1), new Vector3(1, 0, 0)); //?
    expect(v).toEqual(0);
});

test('变量补全', () =>
{
    let v = angleTo(new Vector3(1, 0, 0), new Vector3(0, 0, 1)); //?
    expect(v).toEqual(Math.PI * 0.5);
});

test('几乎平行的2向量', () =>
{
    let v1 = new Vector3(1);
    let v2 = new Vector3(-1, 1.2246467991473532e-16, 5.041544910049491e-16);
    let v = angleTo(v1, v2); //?
    expect(v).toEqual(0);
});