[vtkusers] Displaying Points

[Amy Henderson]

Karin,

This came up fairly recently on this list.  The following is the answer 
that was posted.

Amy

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>Date: Wed, 25 Oct 2000 13:32:39 -0400
>To: "Joris Vanden Wyngaerd" <joris.vandenwyngaerd at esat.kuleuven.ac.be>,
>         vtkusers at public.kitware.com
>From: Will Schroeder <will.schroeder at kitware.com>
>Subject: Re: [vtkusers] Rendering points and large models
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>Hi Joris-
>
>The reason that you have to create a poly vertex cell is because it
>indicates to the mappers that those points referenced are to be drawn.
>Points themselves are not drawn, only cells. You can always write
>your own mapper to do what you want.
>
>Will
>
>
>At 06:30 PM 10/25/00 +0200, kitware-vtk at kulnet.kuleuven.ac.be wrote:
> >---  Forwarded by news2mail for "Joris Vanden Wyngaerd" 
> <joris.vandenwyngaerd at esat.kuleuven.ac.be> ---
> >
> >Hi,
> >I am working with very polydata (e.g. 2.000.000 points and 4.000.000
> >triangles). When applying fitlers, memory usage quickly explodes. Even
> >rendering with display lists gets me into trouble.
> >For saving memory I would like to render the points and ignore the
> >triangles. I found that I can use vtkPolyData and create a single cell with
> >points 0,1,2,3, ... n-1. This seems like a waste of memory to me.
> >
> >Is it possible to draw simply draw all points in a vtkPointSet ?
> >
> >--
> >
> >================
> >Joris Vanden Wyngaerd
> >coordinates : http://www.esat.kuleuven.ac.be/~joris/personalia.html
> >
> >
> >
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