[vtkusers] vtkBox::IntersectBox

[David Gobbi]

On Thu, Oct 14, 2010 at 1:34 PM, David Doria <daviddoria at gmail.com> wrote:
> Has anyone used this function? It doesn't seem to return in an
> intersection in a simple case where I would expect it to.
>
> This example outputs "Not hit!" when I would expect there to be an
> intersection at (-1,0,0):
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/Box
>
> Am I doing something wrong?

The "dir" is more than just a direction, its magnitude is important.
It must be long enough to intersect the box. The documentation for the
method is fairly clear on this point.

  David