[vtkusers] RE: Suggestions for implementing this new approach ?

[tutu lamotte]

Nigel,

All datasets are vtkPolyData instances. Cell types
will not be constant. (Strip, lines, polys, ...)

Each can be very simple, (CUBE) others more complex.
(mesh formed from up to 10000 points for instance.)

They accumulates over time and yes i could work
directly on them since they are the first vtk entity
for their display pipeline. (No source before them)
If i am to group them in a single polydata though,
they will be deleted and replaced by a struct i would
make which would allow me to retreive them from the
big main polydata instance.

Thanks !


--- Nigel Nunn <nNunn at ausport.gov.au> wrote:
> 
> Hi tutu, 
>  
> What is the nature of these "small datasets"?  How
> many 
> points and cells to they contain?  Do you have all
> your 
> "small datasets" at the start of the appending
> operation, 
> or do they accumulate over time?  Can you work
> directly 
> with the points and cells, rather than treating them
> as 
> individual datasets? 
>  
> Nigel 
>  
> >> About the problem we have where our application
> >> takes way too much memory to display lots of
> small
> >> datasets.
> > 
> > Another solution to our problem would be to create
> one
> > big dataset to which all small datasets are
> appended.
> > The original small dataset would then be deleted.
> > Then instead of having many small dataset
> connected to
> > one mapper, we would have a single dataset
> associated
> > to the one mapper.
> > To do that we tried vtkAppendPolyData but its way
> too
> > slow.
> > Any suggestion on how to easily create a filter
> that
> > would merge vtkPolyData instances into one..
>  
>  
> 
>
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