[vtkusers] Ray casting and intersection point

[David Doria]

On Tue, Mar 20, 2012 at 6:57 AM, wingsneak <naygniw at hotmail.com> wrote:
> thank you very much JB.
>
> what do you mean by 1.5 diagonal of dataset?

You can get the bounds of the dataset:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/DataBounds , compute
the length of the diagonal, and use 1.5x that value as the length of
the line segment that you use to do the "ray" intersection.

David