CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 06/20/2012 04:30 AM, hugodelgado wrote:
> Hi and thanks for the interest.
>
> I'm receiving a point set that have been previously cleaned with some
> algorithms for cleaning an image and identifying objects on a MR image scan.
> I do some PCA with the dataset and also extract the surface from a subsample
> of the points representing the surface. As in my project i need ed some
> visualization tool to preview the results, and since that example seemed to
> me to have more tools, i've started adapt that one to include some the stuff
> i needed on my project. I don't know how the triangulation demo could help,
> can you explain me how?
I read triangulate when you wrote translate, sorry.

Point_set_3 inherits from std::deque<UI_point_3<Gt> > so the
std::transform call should work.
Note that you then need to call invalidate_bounds() to indicates that
bounds of the point set have changed.

To update the display, you need to call changed() at the 
Point_set_scene_item level to update the display.

Sebastien.

> Right now i'm translating the points in order to test the PCA algorithms
> since the plane and the line that i receive from the fitting algorithm and
> although they seemed to have the correct orientation they aren't scaled to
> the object, and i think that could be because the particle isn't sampled
> around its centroid. So i'm trying to translate that point set. But i can
> only store the resulting translated points on a vector or some container i
> create to them. I would like to be able to replace my existing point_set
> with the translated one.
>
> Best Regards
> Hugo Delgado
>
> --
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> http://cgal-discuss.949826.n4.nabble.com/Adapting-Point-Set-Processing-demo-tp4655265p4655273.html
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