[vtk-developers] New class for picking volume isosurfaces

[David Gobbi]

Hi All,

I've added a new class to cvs called vtkVolumePicker for picking
volume isosurfaces:

http://www.vtk.org/Wiki/VTK/Volume_Picking

This class also enhances the picking of polydata and images in several ways:

* Cell and Point information is returned (not just one or the other)
* the IJK indices of the pick are returned for images and volumes
* mapper clipping planes can be picked
* the surface normal at the pick position is returned

Like the PointPicker and CellPicker, this picker works by doing a
ray-cast into the VTK data sets in the renderer.  It is not a
hardware-based picker and it emphasizes accuracy over speed.

   David