[vtkusers] !PolyData->CopyCells method?

[Jingyi Jin]

Hi Terrence,

I took this idea from vtkQuadricDecimation class, may
be you want to examine the code by your own. 

I just want to make sure whether the result from your
Delaunay->GetMesh() has more than 17 cells... and
could you tell me which kind of error was generated?
Aparently your code looks correct. 

Good luck.

Jingyi

--- Terence Lim <tlim at mda.ca> wrote:
> 
> 
> -----Original Message-----
> From:
> Sent: October 16, 2001 12:08 PM
> To: 'Jingyi Jin'
> Subject: RE: [vtkusers] Is there a better way to
> delete cells from
> PolyData then....
> 
> 
> Hi there,
> 
> Sorry to bother you.  If you aren't too busy,
> perhaps I may have a moment of
> your time. I am trying to implement what you have
> suggested.  The problem is
> that I get an error everytime I try to call
> CopyCells.
> 
> Here is a piece of my code:
> 
> 
> vtkIdList *CellidList = vtkIdList::New();	//list to
> keep track of all the
> cell ids
> CellidList->InsertNextId(0);
> .
> .
> .
> CellidList->InsertNextId(17);
> 
> vtkPolyData *testPD = vtkPolyData::New();
> testPD = Delaunay->GetMesh();			//GetMesh returns a
> PolyData *
> 
> cout<<CellidList->GetClassName();		//prints out
> "vtkIdList"
> cout<<testPD->GetClassName();			//prints out
> "vtkPolyData"
> 
> vtkPolyData *test = vtkPolyData::New();
> test->CopyCells(testPD,CellidList); 	//results in an
> error?!
> 
> What am I doing wrong here?
> I have tried creating a vtkPointLocator *pl =
> vtkPointLocator::New();
> and then the call
> test->CopyCells(testPD,CellidList,pl); 	but this
> still
> resulted in an error?
> 
> Any ideas? Thanks for your time,
> 
> Terence.
> 
> 
> -----Original Message-----
> From: Jingyi Jin [mailto:jinjingyi at yahoo.com]
> Sent: October 12, 2001 6:45 PM
> To: tlim at mda.ca; vtkusers at public.kitware.com
> Subject: Re: [vtkusers] Is there a better way to
> delete cells from
> PolyData then....
> 
> 
> Or you can declare an IdList to keep the cellIds of
> the original mesh, then delete ID from it whenever
> you
> want to delete a cell. At the end you can call
> 
> newMesh->CopyCells(oldMesh, IdList);
> 
> This way, only the cells in the IdList will be
> copied
> to the new mesh.
> 
> Jingyi
> 
> --- Terence Lim <tlim at mda.ca> wrote:
> > Is there a better way to delete cells from
> PolyData?
> > or is this the best
> > method available?
> >
> > using vtkDecimatePro:
> >
> > -First do BuildCells().
> > -Then mark cells to delete with DeleteCell().
> > -Finally test every cell GetCellType() and copy to
> a
> > second vtkCellArray if
> > type is VTK_TRIANGLE.
> >
> > I've searched through the archives and this was
> the
> > best advice I could
> > find. Does anyone have any other ideas? Thanks.
> >
> > -Terence
> >
> >
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