| Re: [eigen] initialize vector3d from array |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] initialize vector3d from array
- From: Sergiu Dotenco <sergiu.dotenco@xxxxxxxxx>
- Date: Fri, 6 Nov 2015 10:43:46 +0100
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On 11/6/2015 2:01 AM, Nico Schlömer wrote:
> Hi everyone,
>
> I have a large array with the data organized like
> ```
> x0, y0, z0, x1, y1, z1, ...
> ```
> I would like to create some `const Vector3d` from these. How can I do
> that most efficiently?
>
> Cheers,
> Nico
You can use a map:
double a[] = { ... };
Eigen::Map<const Eigen::Vector3d> > vec1(a);
Eigen::Map<const Eigen::Vector3d> > vec2(a + 3);
and so on.