[vtkusers] Issue on handling Large Data

[rakesh patil]

Hi folks,

Any suggestions for this problem?

Thanks

On Fri, Sep 9, 2011 at 7:51 AM, rakesh patil <prakeshofficial at gmail.com>wrote:

> Hello users,
>
> I have implemented a feature in my application which reads file that
> contains x,y and depths values and displays them as a scattered points.
> Well, the actual procedure what I have used is all the data which is read
> from the file is being stored into vtkDoubleArray and vtkPoints. i.e. x, y
> in vtkPoints(z = 0) and depth as a scalar array at the pointdata.
>
> Then I set these things to an unstructured grid and pass it through
> vtkDelaunay2D object to triangulate it. And then pass it through
> vtkTransformFilter to do some transformations and then finally send it to
> mapper which in turn will map it into an actor. Since I am away from my
> workplace so I cannot post the exact code.
>
> This works fine for small amount of datafile of say 30MB contains 2lakhs
> number of points. Now I have a file of 520MB which contains approximately 70
> to 80 lakhs nodes. On loading this file, my application crashes and closes
> automatically. So apart from this method, is there any other way to load
> such large amount of data?
>
> Or I can put the question in other way. How to handle large amount of datas
> in VTK? Is there any technique, which can handle such a large amount of data
> in order to display points.? Also how do I improve the rendering speed.? I
> use wxRenderWindowInteractor as my application is build with wxWidgets
>
> Thanks
>
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