Can you share the sample dataset? That'll make it easier to provide
some options.

Utkarsh

On Fri, Sep 16, 2016 at 1:35 PM, Wei Liu <weiliu...@gmail.com> wrote:
> Hi paraview users,
>
> I hope this is a simple question. I'm trying to visualize a 3D vector field,
> and wonder what is the format of the data. I have a .nrrd file with header
> like:
>
> dimension: 4
> space: left-posterior-superior
> sizes: 3 256 256 130
>
> paraview seems not load the data correctly, because it only show a single
> slice no matter what 'representation' I choose.
>
> Then I use unu tool (for nrrd file) to permute the dimension order and now
> the size is: [256 256 130 3]. I loaded the data into paraview and can see 3D
> cube.  I guess I can use arrow glyph to visualize the vector at each voxel?
> But I couldn't make it work. The arrow always point to same direction.
>
> I may need to read the document more carefully, but is there an simple
> instruction for vector image visualization (3D volume image where each voxel
> is a vector)?
>
> Thank your for your help .
>
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