[vtkusers] vtkPointPicker - I fixed it

[Sarah Graham]

Will,

I found the source of my problem.  I had points and pointSet declared as
static.  It seems this shouldn't affect the program in this case, but it
obviously did.

Thanks again,

-Sarah

On Fri, 7 Jul 2000, Sarah Graham wrote:

> Will,
> 
> Thanks for the tips.  I implemented the markers using vtkGlyph3D, and all
> works well... UNTIL I try to rotate the model.  Then, I get a similar
> error as before: "[processId] Killed".  
> 
> So the questions remains-is it my code, or is there something going on in
> the vtkRenderWindowInteractor causing this?
> 
> Here's a brief description of my implementation:
> PickerHandler() :
>   pointSet->InsertNextPoint(currPicker->GetPickPosition());
>   points->Modified(); 
> Main():
>   pointSet = vtkPoints::New();
>   points = vtkPolyData::New();
> 	points->SetPoints(pointSet);
>   vtkSphereSource *sphere...
>   vtkGlyph3D *glyph...
> 	glyph->SetInput(points);
> 	glyph->SetSource(sphere->GetOutput);
>   ...
>   renderer->AddActor(glyphActor);
> 
>   iren->SetEndPickMethod(PickerHandler...);
>   iren->Initialize();
>   iren->Start();
> 
> Thanks for your help,
> -Sarah
> 
> On Fri, 7 Jul 2000, Will Schroeder wrote:
> 
> > Hi Sarah-
> > 
> > At 11:31 AM 7/7/00 -0400, Sarah Graham wrote:
> > 
> > >So...2 questions:
> > >1) Any idea why the program is crashing when I try to add markers and then
> > >move the model.
> > >2) Is there a better way to add multiple spherical markers other than
> > >creating a new sphereActor each time?
> > 
> > 1) I'm guessing it's a memory problem...I use Rational's Purify product to track things like this down.
> > It's expensive but very good. Also, it may not support your compiler.
> > 
> > 2) You can add points to a vtkPolyData, and then use vtkGlyph3D to place spheres around the points.
> > That way the pipeline never changes, just the data in the initial vtkPolyData. (Caution: if you add a point
> > to the vtkPolyData, you will probably manually want to send a Modified() to the polydata to insure that
> > the pipeline executes properly. This is because low-level data access functions do not invoke Modified() 
> > for performance reasons.)
> > 
> > Will
> > 
> > 
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> 
> ------------------------
> Sarah Graham
> Johns Hopkins University
> sarah at cs.jhu.edu
> http://www.sarahgraham.org
> 
> 
> 
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------------------------
Sarah Graham
Johns Hopkins University
sarah at cs.jhu.edu
http://www.sarahgraham.org