[Paraview] Help with unstructured grid

[George Howitt]

Thanks for the file Sam, but having  looked into it some more I think that
I need to be using a polydata format rather than unstructured grid, as the
data I have is a point mesh.

Could anyone let me know how the legacy files need to be set up for
polydata using vertices?

My code outputs a grid of points with an x,y,z coordinate, and on each
point a value of a 3D velocity field (vx, vy, vz) is defined.

I want to use the stream tracer on this data, but don't know what the ASCII
files need to look like in order to be read correctly by Paraview.

Thanks
George


On Thu, Aug 8, 2013 at 11:34 PM, Samuel Key <samuelkey at bresnan.net> wrote:

>  George,
>
> Maybe this will help?
>
> Sam
>
>
> On 8/7/2013 8:09 PM, George Howitt wrote:
>
> Hi
>
>  I have a fortran code that I'm trying to get streamlines from. The code
> generates a spherical grid of points and a velocity on each of those
> points.
>
>  I have been using a structured grid but paraview doesn't seem to read
> the vectors, instead it thinks they are more grid points and plots them as
> such. >From what I've read it looks like I need to use an unstructured grid
> but I don't know how to set up the cell commands for that.
>
>  Here are the lines of my code that write the .vts files:
>
>
>          write(113,*) '# vtk DataFile Version 3.0'
>         write(113,*) 'This is the cartesian velocity field'
>         write(113,*) 'ASCII'
>         write(113,*) 'DATASET STRUCTURED_GRID'
>         write(113,*) 'DIMENSIONS',nx,ny,nz
>
>          do k = 1, nphi + 1
>         do j = 1, nth  + 2
>         do i = 1, nr
>         write(113,*) xc(i,j,k), yc(i,j,k), zc(i,j,k)
>         enddo
>         enddo
>         enddo
>
>   write(113,*) 'POINT_DATA',nx
>  write(113,*) 'VECTORS velocityfield float'
>  write(113,*) 'LOOKUP_TABLE default'
>
>          do k = 1, nphi + 1
>         do j = 1, nth  + 2
>         do i = 1, nr
>         write(113,*) ux(i,j,k), uy(i,j,k), uz(i,j,k)
>         enddo
>         enddo
>         enddo
>
>  Could anyone let me know how I should modify this for an unstructured
> grid?
>
>  Thanks
> George
>
>
>
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