Function geo_nd::matrix::inverse2

pub fn inverse2<V: Float>(m: &[V; 4]) -> [V; 4]

Find the inverse of a 2-by-2 matrix

Example

use geo_nd::vector::{length, sub};
use geo_nd::matrix::{identity2, inverse2, multiply2, MatrixType};
let i = identity2();
assert!( length(&sub(inverse2(&i), &i, 1.)) < 1E-8 );
for a in &[ [1.,0., 0.,1.],
            [1.,0., 1.,1.],
            [1.,2., 7.,2.] ] {
    let a_inv = inverse2(&a);
    assert!( length(&sub(multiply2(&a_inv,&a), &i, 1.)) < 1E-6 );
}