[vtkusers] Why I can't create a global vtkPolyData instance?

[alex Dowson]

Hi

Can you try this way ?


//----------------------------------------------------
#include <vtkPolyData.h>
#include <vtkPoints.h>
#include <vtkCellArray.h>
#include <vtkGenericDataObjectReader.h>

vtkPolyData* polydata;
vtkPoints* points;
vtkCellArray* polygon;
vtkGenericDataObjectReader* reader;


void main()
{

    polydata = vtkPolyData::New();                
    points = vtkPoints::New();                         
    polygon = vtkCellArray::New();               
    reader = vtkGenericDataObjectReader::New();


    reader->SetFileName("C:\\Users\\Wenlong\\Desktop\\surface.vtk");
    reader->OpenVTKFile();
    reader->Update();

    polydata = reader->GetPolyDataOutput();
    points = polydata->GetPoints();
    polygon = polydata->GetPolys();
}



From: Wenlong Wang 
Sent: Tuesday, May 01, 2012 5:39 PM
To: David Doria 
Cc: vtkusers at vtk.org 
Subject: Re: [vtkusers] Why I can't create a global vtkPolyData instance?

Hi, David

Here is a short demo code. It is built in an empty console application in Windows 7 with Visual Studio 2008(C++)

//----------------------------------------------------
#include <vtkPolyData.h>
#include <vtkPoints.h>
#include <vtkCellArray.h>
#include <vtkGenericDataObjectReader.h>

vtkPolyData* polydata = vtkPolyData::New();                // error pops
vtkPoints* points = vtkPoints::New();                           // no error
vtkCellArray* polygon = vtkCellArray::New();                // no error
vtkGenericDataObjectReader* reader = vtkGenericDataObjectReader::New();

void main()
{
    reader->SetFileName("C:\\Users\\Wenlong\\Desktop\\surface.vtk");
    reader->OpenVTKFile();
    reader->Update();

    polydata = reader->GetPolyDataOutput();
    points = polydata->GetPoints();
    polygon = polydata->GetPolys();
}

Many thanks.

Wenlng



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