CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Kessler wrote:
> I have asked the list several times about the streamline routine Stream_line_2
> with no responses. Am I the only one who uses this routine?
>
> I can run the streamline example code (stl_regular_field.cpp), and modify it 
> to
> plot my data, with constant values for density and separation. But I don't see
> how to modify the code to find streamlines with separation distance as a
> function of velocity (i.e. the distance between streamlines is proportional to
> the velocity magnitude). As far as I can see the streamline separation is
> controlled by the two *constant* values dSep and dRat, but these only change
> the density uniformly over the field. How to make these functions of the flow
> velocity magnitude, as is typically done in meteorology?
After digging a little bit into the code, I did not find a constructor
to set the separation distance as a function. The authors of the paper
probably used an experimental version that is different from the version
published in CGAL.

I will try to get more information from the author of the package and 
let you know.

S.

> For an example of what I am trying to do, see Fig.7 of Mebarki, Alliez and
> Devillers: "Farthest point seeding for efficient placement of streamlines".
> IEEE Visualization, 2005.
>
> Any suggestions appreciated.
>
> Billy K