[vtkusers] how to copy point coordinates to an array

[Hal Canary]

On 05/08/2012 06:43 AM, elem wrote:
> hello
> i need to copy point coordinates which i read from the input mesh to an
> array
> because i have to change (point coordinates)  but i'd like to let the
> original coordinates unchanged !
>
> what i must do ! i m new in vtk and i neeeed help .
> thanks;


Will something like this work?

vtkDoubleArray * getcoords(vtkPointSet * pointSet) {
   vtkPoints * points = pointSet->GetPoints();
   int numberOfPoints = points->GetNumberOfPoints();
   vtkDoubleArray * coordinates = vtkDoubleArray::New();
   coordinates->SetName("coordinates");
   coordinates->SetNumberOfComponents(3);
   coordinates->SetNumberOfTuples(numberOfPoints);
   for (int ptId = 0; ptId < numberOfPoints; ptId++) {
     double x[3];
     pointSet->GetPoint(ptId, x);
     coordinates->SetTupleValue(ptId,x);
   }
   return coordinates;
}

-- 
Hal Canary
http://cs.unc.edu/~hal/