Antwort: vtkPicker..

[Patric.Weis at mycrona.de]

Hi K.R.,

Before using GetNextActor() you first have to set the data pointer at the
beginning of the collection list by InitTraversal(). This function is
inherited from vtkCollection.


Patric Weis
MYCRONA GmbH


- - - Original Message - - -



                                                                                                                                          
                    "K.R.Subramanian"                                                                                                     
                    <krs at zappa.uncc.edu>           An:     VTK HELP <vtkusers at public.kitware.com>                                         
                    Gesendet von:                  Kopie:                                                                                 
                    owner-vtkusers at public.k        Thema:  vtkPicker..                                                                    
                    itware.com                                                                                                            
                                                                                                                                          
                                                                                                                                          
                    16.03.00 19:42                                                                                                        
                                                                                                                                          
                                                                                                                                          




I am using the vtkPicker object to pick all actors intersected.  I am
trying
to retrieve the actors intersected using the GetActors() method (followed
by GetNextActor() from the vtkActorCollection method, but I get nil. I
looked
at the collection object and it has 3 items in it (which is what it should
be in
my application).


I am also able to use the GetActor() method to get the closest actor
intersected (and
the pick position also looks reasonable).


I assumed you iterate with GetNextActor() method of vtkActorCollection
until you get
nil to retrieve all of the actors that were intersected.


Any ideas what I am doing wrong?


    -- krs
--
K.R.Subramanian                           Phone: (704) 547-4872
Department of Computer Science            FAX:   (704) 547-3516
UNC Charlotte, 228A Kennedy
9201 Univ. City Blvd.                     Email: krs at cs.uncc.edu
Charlotte, NC 28223-0001                  WWW: http://www.cs.uncc.edu/~krs










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