Re: [eigen] RotationBase times DiagonalMatrix

[Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx>]

On 23.09.2011 22:42, Christoph Hertzberg wrote:
> class MyUberClass {
> // ...
> explicit MyUberClass(const double& someImportantInitialValue);
> };
>
> Then I would expect that
> MyUberClass a = 0.0;
> does not work (and it does work that way), while

Correction: (and it does _not_ work that way)

> MyUberClass a(0.0);
> does work. The first case would look as if MyUberClass could represent a
> double, which it does not can (it just happens to need one for
> construction).
>
> Also -- maybe more important -- if I have a function which expects a
> MyUberClass and I accidentally pass a double I expect that not to work.
> This, I would say, is again a case I would expect to work for
> Eigen::Transform/Eigen::Translation (passing a Translation to a class
> which expects a Transform), because a Transform *is a* Translation.

Correction: Translation *is a* Transform

> Christoph


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Dipl.-Inf. Christoph Hertzberg
Cartesium 0.051
Universität Bremen
Enrique-Schmidt-Straße 5
28359 Bremen

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