[vtkusers] Uniform Grid with Vectors and Scalars

[Dan Barker]

Hi David,
I think I understand how to set up the vtkPointData so it is associated with the vtkDoubleArrays I need. However I'm slightly confused as to what the equivalent of 
vtkImageData::SetScalarComponentFromDouble(int x,int y,int z,int component,double val)
would be. I could insert the values into the vtkDoubleArrays linearly but how do I ensure they match the correct vtkImageData index?
Thanks,Dan

> From: dave.demarle at kitware.com
> Date: Thu, 1 Dec 2011 08:56:59 -0500
> Subject: Re: [vtkusers] Uniform Grid with Vectors and Scalars
> To: djb_ro at hotmail.co.uk
> CC: vtkusers at vtk.org
> 
> Call myImageData->Get[Point/Cell]Data() to get a hold of the container
> (vtkDataSetAttributes) for the point/cell associated arrays. The
> container can hold any number of arrays and they can have any number
> of components. Each array (vtkAbstractArray) has a SetName(const char
> *) and GetName method too.
> The API for vtkImageData that exposes only one scalar array is a
> legacy from the days before that container existed. It works simply by
> finding the one array in the container that has been marked as the
> "active" scalars.
> 
> 
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
> 
> 
> 
> On Thu, Dec 1, 2011 at 6:41 AM, Dan Barker <djb_ro at hotmail.co.uk> wrote:
> > Dear all,
> >
> > I have several fields, some of which are vector quantities and others
> > scalar, that I wish to store at points on a regular grid, i.e. cubic
> > lattice.
> >
> > I have some code working using the 'vtkImageData' class. This is okay except
> > it can only seem to store scalars (unless I'm missing something) and further
> > I can't see a way to label the scalar components of the vtkImageData with
> > meaningful names.
> >
> > So my question is: What class is best used to store mixed scalar/vector
> > quantities on a regular grid?
> >
> > Kind regards,
> > Dan
> >
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