Function robust_geo::sign_det_x_x2y2z2

pub fn sign_det_x_x2y2z2(
    a: Vector3<f64>, 
    b: Vector3<f64>, 
    c: Vector3<f64>
) -> f64

Computes the determinant of the following matrix

┌─                               ─┐
│ a.x   a.x^2 + a.y^2 + a.z^2   1 │
│ b.x   b.x^2 + b.y^2 + b.z^2   1 │
│ c.x   c.x^2 + c.y^2 + c.z^2   1 │
└─                               ─┘

and returns a number with the same sign as the determinant, or 0 if the determinant is 0