Hi all,

I have a Eigen::Vector2d which I would like to upgrade into a 3d vector Vector3d within computations. Currently what I am writing is:

Code: Select all

Eigen::Vector2d v_2d;
...
Eigen::Vector3d p_3d = <some operation> * Eigen::Vector3d(v_2d.x(), v_2d.y(), 0.0);


Is there a more compact way to code the same behavior?

Thanks,

Antoine.

If you want to extend with 0, then remove the respective content:

p_3d = <some operation>.leftCols<2>() * v_2d;

If you want to extend with 1, then there is v_2D.homogeneous();

And finally, you can also create the 3D vector as:

Vector3d v3;
v3 << v2, 0;

Very relevant, thanks!