[Paraview-developers] different types of blocks , all share the same points

[Utkarsh Ayachit]

It is possible to set the same vtkPoints instance on all blocks in the
multiblock dataset, the caveat being that any filter operating on
points alone e.g. glyph will encounter duplicated points. Another
option is not to use a multiblock dataset, instead just put all of
that in a single vtkUnstructuredGrid and annotate element types using
some cell-data. YOu can then using threshold to remove show only
specific element types.

On Tue, Jun 7, 2016 at 2:51 AM, RIVERA ROLDAN, Jorge Orlando
<Orlando.RIVERA at mtu.de> wrote:
>
> Dear  PV Community,
>
> I am writing a  reader  and  I can't think of a optimal approach.
>
>
> I have a  point cloud , this is one  entity. The connectivity is on this points ,  but the elements are separated into different types or and sets.  I would like to have these element sets independently , so I can turn off /turn on .   I was thinking in using a MultiBlock ,     but  each grid should  have its own points, right?  However, all  grids/blocks share the same points.
>
> My data layout  looks like this:
>
> POINTS:
> Point 0:  X0  Y0  Z0
> Point 1: X1 Y1  Z1
> Point 2: X2  Y2  Z2
> ...
> Point n: Xn Yn  Zn
> ELEMENTS  TYPE=VTK_QUAD
> ELE0:  P0 P1 P3 P4
> ELE1 : P5 P6 P7 P8
> .....
> ELEMENTS  TYPE=VTK_TETRA
> ELE2:   P9 P10 P11 P12
> ELE3:   P13 P14...
> ...
> ELEMNTS TYPE=VTK_HEXAHEDRON
> ELE4 :  P15 P16 P17 P18 P0 P1 P2 P3 P4
> .....
> ELEN :  P19 P20 O21 ... .... Pn
>
>
> As you can see the natural way to separate all different  element types is by using the MB , but as already mentioned the points are  shared by al blocks
>
> Many thanks in advance
>
> Cheers
>
>
> Orlando
>
>
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