[vtkusers] help

[ghzhao]

I write a class vtkKnittedFabricSource, but it does not work.
When I move the Execut() method outside just like the CSpline.tcl demo, it works. Why?

void vtkKnittedFabricSource::Execute()
{
  float pi= 3.141592654;
  int i, numPts;
  float x, y, z, s;
  vtkPoints *newPoints; 
  vtkCellArray *newPolys;
  vtkTubeFilter *profileTubes;
  vtkPolyData *profileData = vtkPolyData::New();
  vtkPolyData *polyData = vtkPolyData::New();
 
//
// Set things up; allocate memory
//

  numPts = this->ThetaResolution;
  newPoints = vtkPoints::New();
  newPoints->Allocate(numPts);
  newPolys = vtkCellArray::New();
  newPolys->InsertNextCell(numPts);
//
// Generate points and lines
//
  for(i=0; i<numPts; i++)
  {
  s=1.0*i/numPts;
     x = this->Shape*s*s*s-1.5*this->Shape*s*s+(this->Width+this->Shape)*s/2;
     y = 0.5*(this->Height+this->Overlap)*(1-cos(pi*s));
     z = 0.5*(this->Thickness-2*this->Radius)*(1-cos(2*pi*s));
     newPoints->InsertPoint(i, x, y, z);
     newPolys->InsertCellPoint(i);
  }


  profileData->SetPoints( newPoints);
  profileData->SetLines( newPolys);

  profileTubes =vtkTubeFilter::New();
  profileTubes->SetNumberOfSides(this->PhiResolution);
  profileTubes->SetInput( profileData);
  profileTubes->SetRadius( this->Radius);
  
//
// Update ourselves and release memory
//
    this->SetOutput(profileTubes->GetOutput());
//  newPoints->Delete();
//  newPolys->Delete();
//  profileTubes->Delete();
}


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