mazth 0.6.0

Matrix utilities.
Documentation 
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#[allow(unused_imports)]
use std::cmp::Ordering;
#[allow(unused_imports)]
use std::ops::Div;

use i_comparable::IComparableError;

#[test]
fn test_mat4x1() {
    use mat::Mat4x1;

    let v = Mat4x1 { _val: [10f64; 4] };
    assert!(v.size().expect("size result invalid") == 4);

    let v2 = Mat4x1 { _val: [2f64; 4] };

    {
        let v3 = v.mul_elem(&v2).expect("mul result invalid");
        assert!(v3
            .is_equal(&Mat4x1 { _val: [20f64; 4] }, 0.0001f64)
            .expect("Mat4x1 is_equal invalid"));
    }
    {
        let v3 = v.div(&v2).expect("div result invalid");
        assert!(v3
            .is_equal(&Mat4x1 { _val: [5f64; 4] }, 0.0001f64)
            .expect("Mat4x1 is_equal invalid"));
    }
    {
        let v3 = v.plus(&v2).expect("plus result invalid");
        assert!(v3
            .is_equal(&Mat4x1 { _val: [12f64; 4] }, 0.0001f64)
            .expect("Mat4x1 is_equal invalid"));
    }
    {
        let v3 = v.minus(&v2).expect("plus result invalid");
        assert!(v3
            .is_equal(&Mat4x1 { _val: [8f64; 4] }, 0.0001f64)
            .expect("Mat4x1 is_equal invalid"));
    }

    assert!(v2.magnitude().expect("magnitude invalid") == ((2f64 * 2f64) * 4f64).sqrt());

    let v4 = v2.normalize().expect("normalize invalid");
    assert!(v4
        .is_equal(
            &Mat4x1 {
                _val: [2f64.div((2f64 * 2f64 * 4f64).sqrt()); 4]
            },
            0.0001f64
        )
        .expect("Mat4x1 is_equal invalid"));

    let v5 = v2.scale(4f64).expect("scale invalid");
    assert!(v5
        .is_equal(&Mat4x1 { _val: [8f64; 4] }, 0.0001f64)
        .expect("Mat4x1 is_equal invalid"));

    let v6 = Mat4x1 {
        _val: [5.0f64, 5.3f64, 7.7f64, 20f64],
    };
    let v7 = Mat4x1 {
        _val: [5.1f64, 5.4f64, 7.8f64, 19.9f64],
    };
    assert!(v6
        .is_equal(&v7, 0.1001f64)
        .expect("Mat4x1 is_equal invalid"));
    assert!(
        v6.is_equal(&v7, 0.0999f64)
            .expect("Mat4x1 is_equal invalid")
            == false
    );
}